4. lighting
Contents
1. Control Offline Isolated Solution AN1916 TSM famil N Channel MOSFET TSM101 d AN2042 Current Mode PWM Controller TSM102 AN2067 Quasi Resonant Controller TSM103 AN201 1 Viper Famil TSM104 AN1059 Viper12 22A AN1060 Viper17 Viper27 Viper53 45 Offline LED Driver Gr Illumination Emergency lighting Architectural amp design lighting e Water features and pools Main MEM Daf Dacinn Vin VAC ST Parts Remark Ref Design Insulated output VIPer12A amp STEVAL Insulated output nsulated outpu 6 0 to VIPer22 amp STEVAL source ei neulat ount STEvaL TSM104 ILL001V1 265 source 5 non insulate Viper17 amp STEVAL 176 to 264 EN 7 max TSM103W Constant current ILLO17V1 nsu lated output 200 to ViPer53 amp Schematic 82 to 265 1000 E TSM101 Dimmable current and layout AN2067 source Up to Up to L6562A amp Insulated PFC amp 6562 d TSM1052 current source 35VVFLB Up to L6562A 82 HV Pwr 80W LED Driver 88 to 265 400VD MOSFETs amp Non insulated SMPS C rectifier PFC 8 Modified Buck Limited Vout in STEVAL ILLO17V1 VIPer1 can provide also up to 15V and 350mA 46 Low Power Offline LED Driver Topologies Buck converter Q1 at high side requires a floating gate drive nherent L C filter provides low ripple current Very short duty cycle with big Vin to Vout ratio Modifie2. E AG LED Driver SD buffer1 DO p buffer2 SDO SD x L FUTLETTL T mi Ste L TL time vVvvevvv vevvvvv 36 STEVAL ILL015V1 Functionality 2 LED Dimming C library Make the designer s life easier UM0588 dimming C library user manual Library key features source files for STM32 and STM8 peripheral pre setting timer DMA SPI to requested values e timer running on background interrupt STM8 or interrupt STM32 simple addition of customer foreground and background tasks brightness and color of each LED defined by three R G B variables ser main c board control c led demoenstration c table generator c led dimmers stmati Hardware 3 STEVAL ILLO15V1 Functionality 3 Output Error Detectio Vo LEDs voltage supply lw a le I n SLL LL LIL Normal Mode Serial Data SDI vvv vvv Nl ca fod Gal ce OR 5 4 Error Detection gp H r 55 s 7 REXI Serial Data Result Entering in Error Detection Mode Serial Data 444 444 38 Tools and Documents Reference Design STEVAL ILLO15V1 Application Note AN2841 User Manuals UM0574 HW UM0588 C Firmware library Datasheets SI P24DP05 SIM32F103 511510
3. C113 J3 47u 450V Ri Q101 7 bl Vr BG High STP8NM50 R114 116 Bis book 1 C112 1k R11 R112 100p OR4 0R41 V DC High D105 STPS5L60 6V primary C202 C20 22uF 25V 100nF y STMicroelectNenics Riis pare ii D ar a 2 ETD29 1mm gap N67 208 turns 2x0 4 Di ble Off 03 16565 STP8NM50 D108 STTH1L600 R2082k7 0107 1N4148 R204 R206 R207 R208 586 586 586 R2051k Offline LED Driver 64 az EVL6562A 35WFLB AN2838 Line voltage range 90 to 265 Vac Minimum Line frequency f 41 63 Hz Regulated output voltage 48V Rated output power 35 W Power Factor Load gt 50 0 9 minimum 4 Minimum efficiency 65 atfull load 1 Maximum 2f output voltage ripple 1 5V pk pk 0 39 Vrms Vin 90Vac Pout Maximum ambient temperature 50 k Conducted In with EN55022 Class B y 4 b l 3 own 244 Fu pr x nina TE UTE od a Surge rejection surge Test 2 5kV Primary to secondary insulation 4 kV PCB type and size Double Side 35 um 120 x 82m 65 sK 2KBPosM 01 S 800V uv 5005006 2 1 2 100nF R25 63V 0627 BY REWORKING 2 2nF C8 STPSNK80ZFP I Fi 20deg W 2A 2200nF 250
4. Power and analog key program IPS amp POWER CONVERSION agenda Power conversion SMPS Main topologies quick roundup Power Factor Correction PWM offline amp HV DCDC Low Voltage DC DC Converters Lighting Fluorescent ballast Analog driven Digital driven advanced H D e LED DISPLAY DRIVER DC DC driven Offline driven Display control fully controlled pre heating ignition Relamp in a single chip Birdroinitfe H multipower system lamp recognition dimming energy saving and ambient light uC for e PFC control feedback 1 multipovver system lamp recognition e dimming energy saving and ambient light v PFC stage complete and reliable v OVP and feedback disconnection protection Anti choke saturation protection allows the use of smaller chokes v Complete and independent programmability of frequencies and intervals v End of life rectification effect capacitive mode and hard switching detection Y Integrated bootstrap diode v Shutdown pin HALF BRIDGE PFC DRIVERS LOGIC amp GATE DRIVER PROTECTIONS HALI BRIDGE SENSE PFC OSCILLATOR CURRENT MULT PL ER Eno ortirc PREHEAT amp SENSE IGNITION PFC SECTION HALF BRIDGE Updated Feature New Feature Application example z 7
5. Application described in AN 1891 More LED applications in AN 1941 Jo Step up topology Signage Torch portable lighting Power Schottky Diode P DC Ma alithie Step up l Switching LEDs Regulator Step up Topology STLD20D STLD40D L6920D L6920DB AN1891 AN1941 96 L6920 1V START UP SYNCHRONOUS STEP UP CONVERTER Features 0 6 TO 5 5V OPERAT NG INPUT VOLTAGE 1V START UP INPUT VOLTAGE INTERNAL SYNCHRONOUS RECTIFIER ZERO SHUT DOWN CURRENT 9 9V AND 5V FIXED OR ADJUSTABLE OUTPUT VOLTAGE 2V UP TO 5 2V 120mO INTERNAL ACTIVE SWITCH LOW BATTERY VOLTAGE DETECTION REVERSE BATTERY PROTECTION E LBI D99IN1041 97 STEVAL ILLOO8V1 L6920 Application CON 1 7 il T achievable 1A output current LED can be driven with 700mA output current Vf 4 4 V 1 LED can be driven with 350mA output current Vf 4V wv 2 35 3 J 3 8 6 s Application described AN 1891 More LED applications in AN 1941 1A DC DC Synchronous Step Up Converter Main Characteristics ST8R00 MICROPOWER 1A DC DC CONVERTER Adjustable Output Voltage from V to 12V e DC DC Switching Frequency 1 2MHz or 600Khz VERY LOW SUPPLY CURRENT n REGULATED OUTPUT VOLTAGE Output Current up to r WIDE RANGE OF OUTPUT VOLTAGE ADJUSTABLE FROM V TO 12 n OUTPUT VOLTAGE ACCURACY 42 Internal Sy
6. SPI dimmable current sink STEVAL ILL003V1 error detection STEVAL ILL002V 1 3 STP16CP05 SPI dimmable current sink STEVAL ILLOO3V 1 2 thermal protection SPI dimmable current sink STP16CPS05 thermal protection Auto Power Save error detection SPI STP16DP05 dimmable current sink therm e 4 3 currnet source values STEVAL ILLO15V1 dimmable current sink therm 11 45 4 75 t0 13 34 35 Adjustable current sink SIP24DP05 Limitation on current solutions for full color Display Complicated PCB routing E STPOSDP05 SDO E 5 OE mn STP0SDP05 SDI LE Rext CLK Red SDO 28 Thermal Shut Down LE DM STP24DP05 B6 N N N e Individual current setting for each color N N V VV channel Oe O SDO _ OE R DM O OE G O D RextR RGB grouping 29 STP24DPO5 Basic Features HGB LED LT block Key Features m Accept 3 3v and 5v micro driver Pu m x3 Channel groups of constant current output channels m Adjustable output current through one external resistor for each group of 8 channel m Short and Open Output Error R1 8 G1 8 Bi 8 1 Detection via and flag pin Driving 1 STP24DPO5 Serial Data IN Parallel Data OUT TM 7777 3 SPI Serial Interface m Gradual Output Delay m Thermal Shut
7. V lave gp X 1 M i 3 e charges on Vn MOS n Vi gp e discharges on nV p VDss gt Vy i laws p X 61 L656x Application Modified Non Isolated Buck Controller for LED Supply Flexible Number of LEDs IN Vac SERIES eg 30 x 1VV GOLDEN B DRAGON E g Vin 110Vac or 230V Measured efficiency 90 but application fine tuning is still necessary e g MOS DIODE GREEN LED CURRENT BLUE SENSE RESISTOR VOLTAGE n PWM dimming 2 1mH F FIXED OFF TIME NETWORK 62 Non Insulated Offline LED Driver for Fashionable Lighting 1 2 Input Active PFC Wide input voltage range 88 264 Output Current source 350 700mA 1000m adjustable mean value Output power 80W Max current ripple 100mA Dimmable 100 Dimension 60x 130 x 2 mm Efficiency prototype 490976 63 Non Insulated Offline LED Driver for Fashionable Lighting 2 2 16V_primary E25x13x7 1 5mm gap N67 Primary 105 turns 2x0 3 Secondary 11 turns 1x0 3 F101 2A T BIO L102 330uH 1A oro Q bi DC High L 73 L101 a NTC 10R oos D102 1n Y1 C104 R101 C10949nF Y Y STTH1L06 R113 57 220nF X2 50k C102 220nF X2 177 MC 2dmH 1A 100R TRNSFMR 67128990 R114 R107 50k 68k C110 1 1 U101 2 d C111 L6562 470 4
8. 36V 0 5V to Vin 290 40 C to 4125 Inhibit Vref Sync 85 L598X Family Gp up to 4A More than 2A in small QFN3x3 8L package with minimum external component count P channel power MOS no bootstrap capacitor QFNS 3x3 Wide input voltage range 2 9V up to 18V High switching frequency 250KHz adjustable up to 1MHz with Synchronization capability Internal Soft start Inhibit pin Embedded protection features B Suitable for MLCC output filter Typ Rpso 7140mo 5 9 wadeksyach re rt g r y Vin V Vout V Fsw kHz Extra Functions 2A up to 1MHz 1 5A up to 1MHz O O 1A up to 1MHz 0 7A up to 1MHz uggested when 00000 2 9V to 18V 0 6V to Vin Inh AdjFsw Sync 2 9V to 18V 0 6V to Vin Inh AdjFsw Sync QFN 3x3 8L Rth j amb 60 C W 86 497 Application Vinz48V 77 Vfb Vsense NER 220nF 78 524 Up to Opt 12 LEDs l 3x 100uF Vled B s uv Rsens 1 40 lled2350mA Vsense 0 5V Circuit for driving up to 12 LEDs T0 LEDs 12 LEDs x 350 Application described in AN 1891 87 L497x Family 4 Up to 3 5A available both and SO packages Wide voltage input range 8V up to 55V and output range 0 5V up to 50V Internal current limit Inhibit pin OVP External reference 3 5A up to 300 KHz
9. 39 5 4 F i lan ON 11 7mA typ CHi Clock AETERNE ESSERE 1 m ll lop Shut down 100uUA typ 2 SDI 2 IccisHUT DoWN CH9 Latch is 117 times less CH4 Supply 4 Current Power Savings An example LED panel size 10m x 5m Estimated number of LED Drivers 10 000 pcs LED drivers active at any one time 20 X Using std LED driver 10 000 will consume high current approx 117 A V Using STP16CPS05 Only 2 000 will consumer high current approx 23 A Power savings using STP16CPSO5 is 80 x E AI EL 2 LEL les k LE z mum games n 4 LZ mo a GE 5 5 regulation usss i mm Adjustable blinking speed m 309 m 936 NU 127 f l f f 9 L N oa roy 1 i 9 10 IDE 119 19 Uu 6 76 19 100 DC DC Pre regulator for high efficiency 16 ir 16 1 HM L PL Typical Applications v LED Information Panels v STP16CPSO5 Y LED Displays ST7FLITEOS signs v ignals 7 Y Decorative Lighting Y Home Appliances White Goods 41 dA 40 L ED array y evaluation board with 6 el 4 4 8 Features 40 OSRAM BLUE LED Matrix is driven Open and Short Line error detection Adjus
10. Circuit for r driving up to 6 LEDs way TouteasomA 7 89 sss 1 ssw 99 95 Vinz24V I T T 1 5 9 945 975 Application described in AN 1991 81 Application Example 597 MR 16 Halogen socket LED replacement Solution 102216 52 L ai 04 Ji STF32 L4 U 05 51 52140 Phoenix 2 pin r STPS2L4DU x J4 05 STPRSZzL4nDL CONN 2 CONN PCB 2 Rs 1568 Ohm 14 Ris 39 6 0 ga hm e LED bulb based on halogen MR16 Solution has very small footprint solution uses the L5970 e This board is intended to work with a 12V c input works 4 4V lt Vin lt 36V e his board is shown driving a single 3W white LED The board can also drive a 1W or future higher wattage LED with some resistor changes e Order Code STEVAL ILLOO7V 1 e Application Note AN2259 Application Example L5973AD 1000 lumen OSTAR LED Driver Main Characterisitics Input voltage Vin 5 30V DC limited by transil Switching Frequency 500KHz Output current lout 1A optionally 350mA or 700mA by jumper setting Output voltage Vout lt Vin Short circuit over temperature protection Drives 1000 lumen OSTAR with 1A at Vin 24V 93 L597x Family 000 6 OQO y TOES 2 250KHz More than 2A in
11. a microcontroller or another simple PWM generator IT Analog control PWM control 1 5mA 20 Color change comparison Current vs wavelength characteristic Power TOPLED Datasheet OSRAM 20 LED Lighting and Norms PFC even when LEDs are used EN 61000 3 2 is valid for LED Lighting too gt At output power gt 25W only with active PFC Power Factor Correction is this norm achievable 21 Solution for Color LED displays based on N STP24DP05 and STM32 N Advanced display LED array drivers control and reference designs 5 Application examples Signs Full color Monochrome Signals Traffic Other Automotive Automobile exterior stop tail turn lights Automobile interior instrumental panel and dashboard Truck and bus exterior Display backlighting PDAs MP3 players and digital camera backlight Mobile phones displays Keyboard backlight Other displays Specialty illumination Flashlights headlights Architectural and design lighting Emergency lighting Water features and pools Home Appliance System Indicator lights Advertising Information panels Special light effects in shop windows Industrial application T E D displavs LEW UlSDIdavS L L 7 V4 O w V I pn HA 1 di 4 y ES O f d z m il 25 E Y Colored traf
12. driven advanced e HID LED DISPLAY DRIVER DC DC driven Offline driven Display control How to control LED Light output There are two basic principles how the light output of the LED can be controlled Since the light brightness is proportional to the current both methods are dealing with current regulation The first and the easiest way is to control the LED current itself with the principal sketch in Figure 1 where current is changed proportionally with the dimming signal Disadvantage of this ana log control is that there can be a significant change of color wavelength difference could be several nanometers in deep dimming less that 10 This potential disadvantage is compen sated by a very simple control circuit usually a simple potentiometer is enough Figure 1 Analog current control Figure 2 Average current control by PWM max average time The second method is based on an average current control digital control as can be seen in Figure 2 The current is switched between zero and the nominal current with a frequency high er than 100Hz to avoid flickering The change of duty cycle and hence the average current change will be seen as a brightness change because human eye reaction is slow enough to integrate the light output and it will not be noticed as a blinking This method avoids the color change problem but on the other hand it needs more sophisti cated control circuits usually
13. resistor e R7 amp C7 compensation circuit of U2 in order to drive Q1 properly Bridge R10 amp R11 to provide 0 3V reference from Vref in pin 3 of U2 Q1 the buffer stage to feed signal to U1 51 STEVAL ILLO17V1 Load efficiency and stdby power ST Products technical document VIPER17HN Offline high voltage converter 115 KHz SM103W Dual operational amplifier and voltage reference STPS2H100A Power Schottky rectifier SITH1RO6A urbo 2 ultrafast high voltage rectifier BAT46JFILM Small signal Schottky diode AN2011 Application note of STEVAL ILLO17V1 53 More application fields Applicable fields Fridge Refrigerator Night light for indoor use Guiding indicator 54 Insulated Flyback solution with High PF 1 180Vac 265Vac gt 11 2 7 y N 4 52 AC IN FUSE H gt 100nF X2 Dout1 3 5V 350mA ou 3 5V 350mA R11 0 530 377mA typ Concept is based on the capability of modulating the Input RHz1 43MQ Current according the mains voltage it is done thanks to the RL 3 3KQ Viper Current limit internal circuit and to the external resistor divider composed by RH and connected between the input Coutz57OyF CONT pin and ground Cin 10nF Input capacitor C2 is ceramic and only 10 nF 95 Insulated Flyback solution with High PF 2 The three figures show input and output voltage and
14. resolution mode for each color gt 16 million colors demonstration e Animated text menu oimple game Wave color demo Solid color demo LED diagnostic Software features e USB interconnection Virtual comport driver used e LED diagnostic during any running firmware demo e Demoboard firmware mode control by on screen buttons instead of on board buttons mi 1 Connect board ta the USE first amp 2 Connect power supply to board 7 U S B 3 Press this button Find board on COM port e e i Board found on e ee e e 1 4 If board found press this button Perform error detection e 1 Automatic error detection rate 1000 ms 500 ms _ C Mone e Exit the application LI ok Incomming Ea STEVAL ILLO15V1 Functionality 2 LED dimming using shift Cascading Principle Shift Register LED Driving Principle 34 STEVAL ILL015V1 Functionality 2 LED dimming using shift Example for 4 channels 8bit resolution dimming 2222 Tswew O O 1111 1101 0101 0001 0000 1111 or new data 256 LEVELS 496 Duty Cycle 1496 Duty Cycle 396 Duty Cycle 99 Duty Cycle 35 STEVAL ILLO15V1 Functionality 2 LED dimming using shift regisi Look up table waveforms for each LED stored in RAM
15. small SO8 package vvith minimum external component count P channel povver MOS no bootstrap capacitor VVide input voltage range 4 4V up to 36V High switching frequency 250KHz 500KHz sync up to 700KHz PI 1A 250 KHz Inhibit pin Embedded protection f 275 whe Typ Rpson 200MmQ Vin 18V 23V to Vin to Vin L5973D HSOP8 4 4V to 36V 5V to Vin all but L5972D 508 Rth j amb 115C W Rth j amb 62C W for L5972D 84 DC DC converters A597xD for Autom More than 2A in small 508 package with minimum external component count P channel PowerMOS no bootstrap 59730 2 250kHz capacitor VVide input voltage range 4V up to 36V 2A 250kHz High switching frequency 250kHz r gt 500kHz A5973AD 1 5A 500kHz Inhibit pin Embedded protection features A5972D 1 5A 250kHz Operates over the 40 to 125 C temperature range BURN IN test for high reliability B5973D 4 A59 0AD 1A 500kHz A5970D 1A 250kHz Demo so 1s asviovm mmen wet syne yas sos Tus ays sov mmen vet Sme so 2 35 c m A5972AD Hsop 2 15 4Vto36V 0 5V to Vin 500 40 C to 125C Inhibit Vref Sync A5973D HSOP8 25 2 AV to 36V 0 5V to Vin 40 C to 4125 Inhibit Vref Sync B5973D HSOP8 2 AV to
16. 1 161 N2 15 amp w 23 Lamp Voltage Inductor Current VLamp Vin Capacitor Emult 10 nF Ignition Capacitor Ecomp 1 8 uF Frequency Capacitor eM 100 nF Lamp Voltage Resistor Aspl2 120 k hm Inductor Current Diode Dboost STTH1LUB Resistor 68 k hm E 5 Ohm Status P Macrom mw Lighting 57 L69741 35 H tf nu in sra 12 Macromedia Flash Player 1 in refinement power mos selection Jireh Current 0 8 Arms Max preh Voltage 339 Vpk in inductors dimentioning gain graph and operating p dn Voltage 735 Vpk views frequency Solution based on the L5574 n supports PFC and a wide range of warmiy ignited lamps fa without dimming The associated explorer offers interactive lamp circuit refinement power m s selection nsses extimation inductors dimentioning gain graph and operating point views Fixed frequency Solution based on the 18559 IC supports PFC and a wide range of warmly or coldly gt ignited lamps without dimming The associated explorer offers interactive lamp circuit refinement power mos selection losses extimation inductors dimentioning gain graph and operating point views Start Window Highlights gt User Friendly Interface Many IC solutions available Combo IC L6574 L6569 or discrete Most Used Lamp model available gt Three main inp
17. 2A up to 300 KHz 0000 O00 DIP8 amp SO 1 14971 Suggested When Vin gt 36V an all but L4976 L4976 and L4973 DIP18 amp SO20 DIP8 amp SO16W 88 Step Down DC DC with Main Characteristics e PWM fixed frequency 900KHz It can be ext synch from 0 4 to 1 2MHz Output Current Capability max over all operating conditions e Output Voltage Adjustable from 0 8V feedback voltage Ceramic Capacitors and small Inductor 3 3V 5V Fixed Output Voltages under customer request e Max Operating Input voltage up to 18V Soft Start circuit to reduce inrush current 57 Efficiency up to 90 e Fast Transient Response e Available with logic control Electronic Shutdown PPAK and DFN Packages e lt SO 8 Exposed Pad ST1S10 Evaluation board with voltage output iz UR STEVAL ISA044V1 SSTEVAL ISA044V2 89 High Current LED Driver Controller Vin 8 18V Vout 2 5 14V lout 1 5A 2 8A only limited by MOSFET and current sense resistors PWM and analog dimmable through interface High efficiency due to synchronous rectification Very compact Key components L6726 SIS8DNH3LL Tools SIEVAL ILLO23V1 coming 5 AN in preparation zs E WU JA T 11 4031 S a ANO 04408 su 90 L78L06AC D2 1 VeceV 6 10uF
18. 36 L6902 Step down current control STEVAL ILLO10V1 AN1891 1941 AN2129 4 4 to 36 121095 2500 L5973 Step down current control STEVAL ILL007V1 CAN 8 0 to 55 333050 1000 L4976 Step down current control 55 AN1891 L6562 Modified Buck Vin Vout Schematics e g 100 lt Vin e g 700 PowerMOS lout 9 available Linear current source 500 STCS05 Linear constant current 4 5 to 40 4 5 to 40 1500 STCS1 source STEVAL ILLO14V1 2000 STCS2 PWM dimming up to 50kHz for buck boost ref AN1891 and AN1518 6 Step dovvn topology Signage Torch portable lighting Power Schottky Diode DE Step down Switching IE Regulator Step down Topology AN1891 L597X AN 2129 L497X L6925 ST1S10 L6926 77 L6902D and Automotive A6902 Up to 1A svvitching reg lator vvith adiustable current lin Step down switching regulator Up to 1A output current 5 output current accuracy e Adjustable current limit Thermal shutdown e 250KHz internally fixed frequency e Precise 3 3V 296 reference voltage Operating input voltage from 8V to 36V Output voltage adjustable from 1 235V to 34V e Protection against feedback disconnection TEST AND APPLICATION CIRCUIT Vy 78V to 36V Veuq 3 3V C1 TOuF 25V C CERAMIC 220pF DONN ISOGA 78 STEVAL ILL010V1 L6902D Reference Design Designed for 350mA LEDs Easily modificat
19. O AC MAINS CHARGE 1 19 1 PUMP e PROTECTIONS PFC section features MULTIPLIER v sinusoidal reference Y superior PF performance v Wide range Mains operation optimized THD ERROR AMPLIFIER Y Compensation network SY ZCD network v E A inverting input 2205 v Static OVE pem v Dynamic OVP optimizer O HB INPUT TM type lac Ej ZCD MAINS _ dal CURRENT SENSE NB x T v current mode control 1V clamp 3 Y choke saturation protection V leading edge blanking _ 4 ae GATE DRIVER v 300mA source typ Y 600mA sink typ Updated Feature a atur New Feature 8 Peng X Regg X Coso PRE SUEDE 1 328 Regg Ipng D Hp Cp 2 03 leu Tppe 4 53 TE Tien 3 Rope PRE HEATING 1 328 22 2 RUN Cosc HB section HBCS Features 1 Ignition gt Controlled lamp voltage current Double threshold e LOW 1 6V frequency increasing and Fast Tch cycle timing externally programmable to limit the current in case of broken lamp or too old lamp Noise immune overcurrent detection method is used e HIGH 2 75 IC stops immediately in case of capacitive mode caused by choke saturation 2 Run mod
20. Phase Hann Inductor un c 10uH 4 D3 STPSIL30M Stop prece zm pes Usan 7 ya es mr ia zm rn m Jusipa ic T m mizan pi e Schematic ZEE 0 5 j f H 2 80 1 a Output current with 1 x 2 8A LED 2 78 embed Her eH dE edere E dH de HE Sere eden He Ee EH He Ee EH n Ee EH E Hn e EH ES In i Ch4 Mean 91 L EL as Step Up Solutions Step dovvn topology Signage Torch portable lighting DC LI Step down Switching onu Regulator Step down Topology 6902 597 L497X ST1Sxx AN1891 AN1941 1 6925 1 6926 93 L6925 L6926 Monolithic synchronous converter High efficiency monolithic step down regulator gt Operating input voltage 2V 5 5V battery supplied applications No external Schottky required minimized external component count 600kHz switching frequency gt Externally synchronizable from 500kHz 1 4MHz gt MSOP8 package 800mA maximum current Overcurrent protection x POWER CROSSING Nios 6925 16926 Application Monolithic synchronous converter Vinz5V L 6 8 uH wm vs T 9 _ L6926D in buck topology supplied by 5V for 1 high brightness LED
21. R operation T Frequency foldback function ine voltage feedforward function Pulse by pulse overcurrent protection 2nd overcurrent level with latched shutdown Disable function nternal current sense RC filter Package SO 8 Minidip For LED application it is used as a standard fly back converter with current regulator on the secondary side e g with TSM10xW 59 L6562AT PFC Controller Guaranteed for extreme temp range outdoor Streetlighting Transition Mode controller of Proprietary Multiplier for min THD Micropower start up current 30 uA Low quiescent current 2 5 mA typ SUPPLY BUS ZCD inputfor TM operation Very precise adjustable output OVP 1 internal reference e On Chip Filter on current sense 47 pem Pulse by pulse overcurrent protection Disable function nternal current sense RC filter Package 50 8 Minidip8 si C ERROR MULTIPLIER AND THD OPTIMZER For LED application it is used as a standard fly back converter with current regulator on the secondary side e g with TSM10xW 60 L656x Application Modified Non lsolated Buck Controller for LED Suppl Ba m n lr L P i a LI AA TET mE a ray Y 3 4 AZN D Ses x Su A A a D DIODE e VRRM gt
22. V TSM1052 lt 1 Rey 09 T nF NZ PL us mw 19 q x SEC 90 265Vac 66 6562 Insulated High PF AC DC LEDs Driver 16562 In fly back topology addresses medium power LED applications offering Cheap and flexible Insulated Single Stage conversion PF greater than 0 9 NO electrolytic input capacitor NO electrolytic output capacitor if its value allows the use of ceramics Key Components L6562A T 51 1052 STP5NK80ZFP 5 1106 STTH3R02 Tools EVL6562A 35WFLB voltage output can be expanded to Curr Ctrl AN2838 67 Topologies amp Solutions for Street Lighting New trend for High power Street lights is based on LEDs due to gt reliable and safe gt technically advanced gt economical gt environmentally friendly gt convenient for maintenance save energy improve light quality 68 Street lighting with 108W LED lamp Street lighting with 250W HPS lamp 70 LEDs Street Light Current solutions in the market are facing some main bottlenecks Life time of the solution after 1 5 years a lot of failures in LED and power supplies One of the most critical components in the power supply is the E CAP Wide range of temperature operation still a lot of problems in sustaining adverse weather operating conditions and power dissipation Market maturity This business has a very high p
23. VAL5973 L6902D order code EV AL6902 L497x order code EV AL4971 or EVAL4971D or EVAL4973 L6561 order code EVAL6561 80 L6562 order code EV AL6562 60 L6920 order code EV AL6920 113 App plication Notes Overview ated for LEDs 1891 Application ideas driving LEDs using L497x L597x L692x DC DC converters families 1941 Low voltage LED driver using L6920D 14971 and 169020 AN 2129 Dimmable LED driver using L6902D 2333 White LED power supply for large display backlight using STLD40 2243 Step up converter for camera flash light using STCFO1 2304 Designing a Flash LED driver using an STCFO2 step up down current mode converter AN 2259 High intensity LED driver using the L5970D L5973D UM ILL023 High current 2 8A LED driver using 16726 in preparation Offline 1916 ViPower Offline constant current LED driver using VIPer12 22A 2042 VlPovver Dimmable driver for high brightness LEDs with VIPer22A AN 1060 Flyback converters with the L6561 PFC 1059 Design equations of high power factor flyback converters based on L6561 AN 2067 Dimmable white LEDs power supply with VIPer53 1734 VIPer12A SINGLE OUTPUT REF BOARD 85 TO 264 VAC INPUT 6W OUTPUT AN 1934 VIPer12A NON ISOLATED FLYBACK CONVERTER REFERENCE BOARD 1894 VIPer12A NON ISOLATED BUCK AND BUCK BOOST CONVERTER REF BOARD AN2811 VIPer17 bas
24. ble with SOT23 8L version e White Led supply for LCD backlight Mobile phone PDA and organizers Any handsets powered from 2 8V to 4 2V Maximum output voltage 18 5V internally limited 5 white LEDs be driven with 20mA output current Vf 3 5V 102 STLD40 Application Vi 24 7 uH D STLD4OD typical application circuit White Led supply for LCD backlight Any handsets powered from 3 3V to 4 8V PDA and organizers Mobile phone Maximum output voltage 37V 10 white LEDs can be driven with 20mA output current Vf 3 5V 103 Linear solution to drive LEDs Linear solution with high power dissipation on resistor using 21 Advantage Disadvantage Low cost solution Efficiency Easy design Power losses on resistor Less components 1s used Output voltage range 1 25V to 37V Maximum output current 1 5A R2 U adj I led LED1 15 77 EM 715715 U adj 1 25V DC input XE 7 ma voltaqe p LED2 2 LED 104 1 5A Max constant current LED driver Description Features The STCS1 is a BiCMOS constant current source designed to provide Up to 40V input voltage a precise constant current starting from a varying input voltage Less than 5 voltage overhead source The main target 15 to replace discrete components solution for Output current setting between driving LEDs in low volta
25. current obtained from the schematic described in the previous page used to supply 3X1 W series Led Vin 180 Vac Vin 230 Vac Vin 265 Vac PF z 0 944 PF 0 917 PF 0 882 TT m T T T E LL R EL cm sm TI x SS l 4 f 1 1 ZOT I i i Lu L UA La Che Oma 12 Che n 1 3 ist i i 1 E Ed i D Der 125 Dil 1062 L Dp M zooms 12 Se cns iz 104 a end n LN CE E 1 1 1 1 1 hi BOLD sdi Chi o TERM Di Chi lm 2 EH p 96 AC DC high efficient solutions for general lighting and street lighting Offline LED Driver Non Isolated illumination Architectural Lighting General Lighting Peak Clamp Ultra fast 200V 300V 400V diodes PKC 136 PWM 1 Control ni Offline Isolated Solution TOUS AN2838 amily M067 N Channel MOSFET TSM101 Current Mode PWM Controller TSM102 Juasi Resonant Controlle TSM103 Resonant Controller Viper Family TSM104 Viper12A Viper22A Viper53 Viper17 58 L6565 Quasi Resonant Controller e Current mode quasi resonant PWM controller Micropower start up current 75 uA Low quiescent current 3 mA typ e ZCD input for Q
26. d or inverted buck converter Q1 at low side the gate drive is referred to ground Vout is referred to high side Inherent L C filter provides low ripple current Ene Very short duty cycle with big Vin to Vout ratio Flyback converter Flyback transformer is required It also provides bias for Q1 amp Vaux for PWM controller Low input current and optimized duty cycle also with big Vin to Vout ratio 47 VIPer22A Application Example Application described in AN1916 11 0 047 Isolated flyback configuration Constant current output 350mA Output voltage from 5 7V to 27V 9 LEDs can be driven with 350mA output current Vf 2 3 4V B m k sir m nd Teo Uj i HE EIAS Evaluation Board STEV AL ILL006V1 Dimmable Evaluation Board STEVAL ILLO001 V1 48 STEVAL ILLO17V1 Reference Design 2W not insulated Offline Constant Current LED driver PCB dimension is important No line isolation is required he specification is as following AC input 220 0 Output current 500 mA Output voltage 7 maximum Dimension 30 mm x 30 mm Isolation from mains Not required Topology Constant current source y 49 STEVAL ILL017V1 Miniature size 30 00 90 STEVAL ILLO17V1 Offline Constant Current Control e Not isolated common ground R9 amp R12 the output current sensing
27. down with flag m Excellent Current Accuracy m Output Current 5 80 a 25MHz Clock Frequency 11 e ez 26767 697 m Z TQFP48 Aimed to customers working on applications with high I number of low power LEDs either color or monochromatic Open software architecture easily integrates Demo USB and JI AG programming connectivity to use the board as a simple development tool Gerber Files PC Software available as example STEVAL ILLO15V1 6 rows 30mA LEDs driver with buck regulator Applications Indoor or outdoor use LED advertisement billboards Graphic boards Colored traffic signs Variable message signs Key Products STP24DP05 STM32F103 511510 Documentation AN2841 UM0574 amp 0 588 published 31 LED driver STP24DP05 Power supply x LED driver 571510 STP24DP05 T s FE EEE Er 4 5 STM32 3 3V USB LED Drivers Open jumpers N 1 GAF 99999 Ta on r a ru Select ram h E E E uuum a L xun ILI come ie OE yoz EE T 1 2 5 ui i i 41 i 7 18V 15 m 7 Short jumpers JTAG RGB LEDs Error Flag Temperature flag RESET Buttons Knob 32 STEVAL ILLO15V1 Functionality 1 PC Interface Firmware modes 8 bit
28. e gt 3 levels Over current protection Triple threshold e LOW 0 9V frequency increasing and Tch cycle timing to limit the current Noise immune overcurrent detection method is used MIDDLE 1 6V IC stops immediately when a long 300ns hard switching pulse is detected Capacitive Mode protection Lamp disconnection 9 HIGH 2 75V IC stops after 350 subsequent hard switching pulses 40ns in order to prevent capacitive mode due to operation close to Normal X Saturating Switching resonance HV BUS HV BUS CBOOT 000 LAMP E m v Compliant with both standard ballast configurations without circuit change using EOLP pin v Precise and programmable thresholds for the EOL intervention v Filtering to delete noise effects 2 LAMP Support material Datasheet gt Demo board STEVAL ILB005V2 gt Application Notes AN2870 Combo IC for ballast control Developing software 57 6574 IC based Ligthing Solution 115 HE 35W Tools Windows schematic Stage Switching Stag Current 0026 0 00281 0 00282 0 0 00284 0028 Lamp Stage Parts Reference L mH 2 Inductor Design 561 PFE Driver C 33nF L CC Selection Capacitor Cin 150 nF Resistor Rif Ri2 1000 kOhm Preheating Resistor Rent_3 6 8 kOhm Frequency E20 10 5 Inductor Lboost 2 23 mH lgap 0 55 N
29. ed 2 W non insulated Flyback LED driver UM0670 80W non insulated offline LED driver with PFC and DC DC converterbased on L6562A AN28368 35W High power insulated flyback LED Driver based on L6562A LED Matrix Display AN 2141 STP16CP596 L5970 ST7Lite09 LED Array driver reference design AN 2415 STPO8CDC596 15970 LE50 ST7Lite39 LED error detection demo board AN 2478 STPOSDPO5 STP16DP05 Normal mode and error detection features 2531 Generating multicolor light using RGB LEDs with STPO4CM596 AN2841 0 0574 0 0588 STP24DP05 STM32F103 Array and Display driver reference design 114
30. fic signs RGB lighting for gaming and gambling machines RGB LED matrix displays LED advertisement billboards Graphic boards Variable message signs N 4 LED Array Big panel LED display Traffic signs 4 5 5 5 16 5 16 5 16 505 STP24DP05 Switch Mode Current Control Power Supply and Driver LED Displays Big Panel VED Display Traffic Signs Viper Family Current Mode CPWM Controller Microcontroller ST7 5 85 STM32 25 LED array sink drivers Features Low voltage power supply 3 0 to 5 5V Voltage capability at Outputs 20V e 4 8 16 24 constant current output channels e Adjustable output current through external resistor Serial data in parallel data out e Serial out changes state on the raising edges of clock e Up to 30MHz clock frequency 3 3V micro driver able Output current 3 500mA depending on type of STPxxyy05 Thermal protection e Auto Power save at STPxxCPS05 LED failure detection at STPxxDP05 e Available in high thermal efficiency TSSOP exposed PAD LED array sink drivers block diagramm OUTO OUT1S R EXT sn lie D l D 500 elrel pei CLK 9 gt 5515030 26 SPI dimmable current STEVAL ILL009V1 Part sinkPVVM dimming thermal STEVAL ILL009V3 STPO4CMO5 50 to 500 protection STEVAL ILLOO9VA
31. ge applications ImA and 1 5A precision 10 PWM Dimming pin up to 50kHz Shutdown pin LED disconnection diagnostic Slope control with external cap for controlling current rise from tens of microseconds to tens of milliseconds allowing reduction of EMI Applications LED constant current supplying for varying input voltages d N gr OFF Lovv voltage lighting T Rea Small appliances LED lighting ei 0 2 Car LED lights Open Drain output 10nF 105 LED7706 7 backlight and emergency lighting 106 iy 2A svvitch up to S5mA for each rovv up to 1MHz 15 e family for LCD Backlight and Emergence in I lt lt L e 5 VIN from 4 5V to 36V Available soon 2A switch up to 30mA for each row up to 1MHz lt gt FAULT lt 1 OVSEL lt PGND CC ROVV6 C ROWS ROWA C ROVV3 2 2 2 3 888 V E Example of LED load view board VFQFPN 4x4 107 0A LED7706 7 Key Features S7 Boost Section 6 8uH 4 5V To 36V Input Voltage Range VIN Internal Power MOSFET 4 5V to T Internal 5V LDO for device supply m Up To 36V Output Voltage Constant Frequency Peak Current mode Control 200kHz to 1MHz adjustable switching frequency External synchronization for Multi device Application Pulse skip power
32. ion for higher E current v Fully dimmable board i ll l ON2O 192 gt O T a ay T und N S Im NO Na B Analog dimming Digital PVVM dimming Maximum output voltage limited 5 LEDs can be driven with 700mA output current Vf z 4 4V 6 LEDs can be driven with 350mA output current Vf AV Reference Documentation AN 2129 More LED applications in AN 1891 AN 1941 19 L597x Family Step down switching regulator L5970D 1A switchin SO II L5970AD 1A Switch in 508 500kHz switching frequency L5972D 2A switch in 5 8 4 ground leads L5973D 2 5A switch in HSO8 4 4V to 36V input voltage L5973AD gt Internal P channel DMOS transistor with a typical Rds 2A switch in HSO8 on of 250m0 500kHz switching frequency adjustable output from 1 25V gt 250kHz or 500kHz internally fixed frequency 5 VOLTAGES gt 3 3V reference available L5972D res s y REF gt Inhibit for zero current consumption except L5972D De gt Internal current limiting Protection against feedback disconnection gt Thermal shutdown and Synchronization LPDMOS POWER GND OUT DONT 125 o0 L597x Application Schematic Up to VIN 15 uH 12V to 24V x k 6 LEDs STPS2L25U F 59700 Vled 10uF 22nF v 25V GND INH 4 TKO i Rsense 1 1 322 Vsense x350 mA 7
33. nchronous Rectification 22 lt n SYNCRONOUS RECTIFICATION Efficiency up to 9075 Output set to 9V TEVIXIRMALCOMPONINTS DEN SS n VERY SMALL PACKAGE DEN 5x5 8L The STRRUU is to he ji sed in 57 where Logic Control Electronic Shutdown low noise low ripple and lw supply DESCRIPTION required The Is anl in very small Output Current CUT OFF when in shutdown The STSROO is a synchronous high efficiency PWM packages DFNSxs 8L QFN 4X4MM 8L Demo board available on request E 7 Step up topology Signage Torch portable lighting Step up Topology 0200 0400 Power Schottky Diode P Step up Switching Regulator L6920D AN1891 L6920DB AN1941 100 STLD20D STLD40D STLD20D drives 4 and STLD40D drives 10 white LEDs from battery voltage supply Constant LED current regulation High efficiency over extremely wide range of battery voltage LED branch isolation switch STLD20 only Over voltage and over temperature protection Dynamic battery voltage variation compensation Soft start Shut down mode with dimming control STLD20D C8 only Smal packages 101 STLD20 Application LOHSSCM STMBAT20J Efficiency versus for 4 LEDS Tamb 25 C L 10uH D LED 20mA F an LQH32CN 10uH DCR 1 0150 9 500kHz EFFICIENCY Availa
34. otential but it is still in the demand creation phase and waiting for the adoption form local governments 71 LED Street Light ST solution ST addresses all these bottlenecks with a solution based on ac mains l 85 305 Vac DIMMING DIMMING L6562AT L6599A T are guaranteed over 40 to 125 degrees making them suitable for reliable power supply with very aggressive form factor easily fitting all the current street lamp solutions 72 Schematic of Streetlighting Resonant Suitable for 120W Streetlighting sizeable to 250W 73 Streetlighting Resonant Circuit Key components L6562AT Resonant Controller L6599AT MOSFETs STP21NM50N STP8NM60N Ultrafast Diode ST TH3LOGU Schottky Diodes STPS1015DCG Tools Reference board in design AN in preparation 74 Switching DC DC up to 2 8A supply and control for general lighting and automotive Low Voltage LED Driver 177 7 Where Vin lt V LED use Step Up topology Where Vin V LED use Step Down topoloqv Vin Vout lout ST Part Remark Ref Design App Note VDC VDC mA otep Up 2 510 5 0 Up to 18 5 STLD20D 060055 2t052 soo L6920 Step up current control STEVAL ILLOOSV 1 AN1891 AN1941 6 X30 LED7706 1 x Step 6 x linear EVALED7706 AN2806 6X85 LED7707 current sink dimmable EVALED7707 Step Down 1000 L6726 Step dovvn current control 8 0 to
35. rnet m Input voltage 90 265Vrms m PFC vvorking in a fixed off time mode m Ballast efficiency higher than 90 m Output stage Full Bridge vvorking in continuous conduction mode m Lamp driven with low frequency 160HZ square waveform m Lamp current controlled by high frequency 40kHz buck converter Typical Applications STGIONB60SD Y Street Lighting y yos Y Retail Lighting Solution replacing 7 v Warehouses magnetic ballast with er Y Industrial Lighting better efficiency and STP12NM50FP eria STTH8O amp TTI Y STTH1L06 Y ST7FLITE3 F2M3 STEVAL ILH003V1 Lighting 70W H D Lamp Ballast based on L6569A and L6562A Features Driver L6385ED m 50 60 Hz 88V 264V wide input voltage range m Easily drive of a 70W metal halide lamp m working in Fixed On Time m iwo stage topology m Warming up state for start up m Illuminate in steady state m Dual Buck Converter solution L amp driven with low frequency 200 2 HB buck converter m L amp current controlled by high frequency HB buck converter m Load power control technique m Ballast efficiency higher than 88 ESESE3 EVALUATION BOARD www st com evalboards 1 8 IPS amp POWER CONVERSION agenda Power conversion SMPS Main topologies quick roundup Power Factor Correction PWM offline amp HV DCDC Low Voltage DC DC Converters Lighting e Fluorescent ballast Analog driven Digital
36. saving mode at light load Programmable Soft start Programmable OVP protection Thermal Shutdown Suitable for MLCC Output Filter VouT up to 36V SS COMP SGND 0000 O 99 0 108 LED7706 7 Key Features Backlight driver Section Six rows with 30mA 85mA maximum current capability Adjustable Up to 60 White LEDs Parallelable rows for higher current LED7707 Vour up gt Rows disable option to 36V Less than 500ns 10us minimum dimming time 1 minimum 4 7uF dimming duty cycle at 20kHz MLCC gt 2 current matching 9V il between rows LED failure open T T and short circuit 86 komka detection Internal MOS A 5 NN SN 5 75 LED7707 only L s 6 2 NN NN NS NN Up to 10 WLEDs per row nu L imming Fault Faults Management Selection Enable Sync Output 1 09 7707 6 rows 85mA LEDs driver with boost regulator for LCD panels backlight m LED7707 VFQFPN 4x4 driver onboard set for T g T TES 60mA channel m 4 5V to 32V input voltage range m Up to 10 White LEDs 36V in series on each channel Selectable switching frequency 660kHz or 825kHz Selectable fault management TENEO REGIT m Onboard test point for each important signal for laboratory Ies n 02255509 IST G l evaluation Bw WLS T EOFS Onboard reset b
37. table Brightness e Led current regulation b o xu speed w Jii PE i ii p us d n Different blinking modes IC DICHOTONE Animated text I i 44 f H R 5 16 f tB CEC l f 16 fe 7 DC DC Pre regulator for high efficiency p 41 uf l 1 1 16 4 fere 19 H l Te 16 it il amp Input voltage supe v STPOSDPO5 TV T 51232 v L597OD Typical Applications Y LED Information Panels Y LED Displays Y Traffic Signs v Signals STEVAL ILLOO2V 3 becorative Lighting Y Home Appliances White Goods 40 LED array evaluation board with diagnostic based on advanceddogic STPO8SDPOS Features 40 TOSHIBA GREEN LED Matrix is driven Open and Short Line error detection Adjustable Brightness Led current regulation Adjustable blinking speed Different blinking modes Animated text 1 1 1 1 m 1 1 1 1 Bonan u ununu un DC DC Pre regulator for high efficiency STEVAL ILLOO2V4 15970D v Signals Y Decorative Lighting Y Home Appliances White Goods 43 AC DC single package drivers ViPer with minimum stand by consumption Offline LED Driver illumination Architectural Lighting General Lighting Peak Clamp Ultra fast 200V 300V 400V diodes PKC 136
38. ut voltage range selectable Warm or Cold lgnition design PFC design Dimming feature under development 13 IPS amp POWER CONVERSION agenda Power conversion SMPS Main topologies quick roundup Power Factor Correction PWM offline amp HV DCDC Low Voltage DC DC Converters Lighting e Fluorescent ballast Analog driven Digital driven advanced HID e LED DISPLAY DRIVER DC DC driven Offline driven Display control Metal Halide MHD high efficacy excellent color rendition long service life and good lumen maintenance commercial interiors i 1 High pressure sodium lamps HPS energy efficient yellow orange light extremely good lumens per watt poor colors render exceptionally long service life up to Bae EIS 40 000 hours 5 Eris 7 ens Mercury Vapor Mercury F25 117 EDA8 EN Poor colors rendering 4 x 5 4 h Ballast for high intensity discharge HID lamps half full bridge configuration low frequency PWM lamp resonance lamp current control Auxillary Power Suppiy y High Voltage High Voltage m High Voltage Level Shifter Level Shifter Level Shifter Power Factor Lorrector Communication Interface 16 Sales description STEVAL ILHO01V1 12747 on Inte
39. utton Pi 6 m 8 pins header for external LEDs array connection m Fault LED indicator Typical Applications LCD monitors amp TV Panels v PDAs Panel Backlight ino Y GPS Panel Backlight control performance for Y Emergency Lighting driving LEDs in not only 6 strings 85 each but even one string at o00mA 110 Documentation Demo Evaluation boards overvievv LED dedicated STP2ADPO5 order code STEVAL ILLOISV1 STPIOCPOS order code STEVAL ILL003V2 STPOSDPOS order code STEVAL ILLOO2V 3 A 4 order code STEVAL ILL009V5 order code STEVAL ILLOO9 V3 LOAD board with LEDs order code STEV AL ILL009V4 LOAD board with LEDs L6902D order code STEVAL ILLOIOV 1 Coming soon L6726 STSSDNHLIL order code STEVAL ILL023V1 L6920 order code STEVAL ILLOOSV 1 L5973D driver for MR 16 STEVAL ILL007V1 STLD40 order code STEVAL TLLOOIV 1 SICFOI order code STEVAL TLLOO2V1 coming soon SICFO2 order code STEVAL TLLOO3 V1 coming soon LED7706 7 order code EVALED7706 7 VTPer12A order code STEVAL ILL005V1 New VIPer17 order code STEVAL ILLO17V1 VIPer22A order code STEVAL ILLOO6V 1 VIPer22A with DALI connector STEVAL ILLOOIVI Coming soon L6562A order code STEVAL ILLOI3VI Osram Dragon LEDs order code STEVAL ILLO18 V 1 2 3 4 112 Demo Evaluation boards Overvievv General purpose boards L597x order code EV AL5970 or E
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