LXY28161 USER`S MANUAL
Contents
1. aaa athe aaa aa aa GHD 14 SN of chips FOC GND 1 1 2 2 4 4 5 5 B B 7 5 B SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD EA 9 Rt EE Rt obs Hr fe ELE CERE The Rt value should satisfy Et RE H 98 besides set the value as small as possible Otheranse there willbe current difference betaeen ICs which wall effect the color uniformity LXY28161 USER S MANUAL 4 2 In the Line output before connecting the GND add a zener diode The voltage of the zener diode is between 3 0V and 3 6V Test and choose one that suit most In out test 3 3V is good Line output ROWO 510 ohm pull down resistor Zener diode 4 3 For Electronic capacitors please use Taiwan Lelon s RXZ series high frequency capacitors or some other brand which is similar in functions with the follow specifications http www lelon com tw index php fn search2 amp keyword rxz SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD 15 LXY28161 USER S MANUAL Aluminum Electrolytic Capacitors RXZ Feature 105 C 2 000 hours assured Low Impedance type 6 Enabled high ripple current by a reduction of ESR high MESZ RL frequency range suitable for computer motherboard RoHS Compliance 680 16v 680uF 7 SPECIFICATIONS Performance Operating Temperature Range 40 C 105 Capacitance Tolerance 20 at 120Hz 202. OBIIT 10 2 12 Thermal PUNCO 11 210 Supply 11 2 12 watches Noise e derart 11 2 15 Equivalent Circuits of Inputs and 12 2 Package 12 4 14 CO SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD 2 LXY28161 USER S MANUAL 1 Product Description Small OutLine Package LX Y28161 the 16 channel constant current LED Driver is designed for LED video applications using internal Wise Pulse Width Modulation W PWM control with selectable 16 bit color depth LX Y28161 saves the 60 Hz images input data in the 8K RAM then converts into each pixel gray scale of output channel all L SOP24 300 1 0 output channels can be built with 65536 gray scales and 4800 Hz refresh rate Thin Shrink Package LXY28161 has 16 constant current output channels Constant output current is invariant to load voltage change The output current can be preset through an external resistor LXY28161 supports static and any scan mode within 16 led displays The gray scales and refresh rate 15 user adjustable 5 550 24 150 0 635 1 1 Features Backward com
3. C 1 0 01 or 3 whichever 1s greater after 2 minutes Leakage Current at 20 C Where C rated capacitance in V rated DC working voltage in V eas cand 1208 201 re When the capacitance exceeds 1 000 uF 0 02 shall be added every 1 000 uF increase Impedance ratio shall not exceed the values given in the table below TON Raed oe impotence 2250020000 Ratio zcaycyzemt Load Life Test The above specifications shall be satisfied when the capacitors are restored to 20 C after the rated voltage applied with rated ripple current for 2 000 hrs at 105 C Shelf Life Test Test time 500 hrs other items are the same as those for the load life test Ripple Curent amp Malis Multiplier 05 08 09 10 DIAGRAM OF DIMENSIONS D f max LEAD SPACING AND DIAMETER Unit mm 263 0 1 Y qx es N x 7 i 1 44 lt NM 27 15 Ls dane 4min Dimension DxL mm Ripple Current mA rms at 100KHz 105 C DIMENSION amp PERMISSIBLE RIPPLE CURRENT Impedance 2 at 100KHz 20 C 8x20 1 800 0 019 1 870 1 500 0 019 1 870 1 000 0 019 1 870 008 2000 F
4. CIENCE AND TECHNOLOGY CO LTD LXY28161 USER S MANUAL 2 6 Timing Waveform 2 6 1 Serial Port Timing Waveform WIDCLK DCLK LE SDI SDO 2 6 2 Output Current Channel Timing Waveform DELK OUT4n 1 OUT4nt2 OUT4n 3 SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD LXY28161 USER S MANUAL 2 Constant Current In LED display application LXY28161 provides nearly no variation in current from channel to channel and from IC to IC This can be achieved by 1 The typical current variation between channels is less than 3 and that between IC is less than 6 2 In addition the output current can be kept constant regardless of LED forward voltages This guarantees LED to be performed on the same brightness as user s specification 2 8 Setting Output Current The output current is set by an external resistor R The default relationship between I is Veexr l 20V Vicexr 15 5 Rext is the resistance of the external connected to R EXT terminal VR EXT is its voltage The output current is about 2113 when Rext 91092 and 10 8 when Rext 1800 9 2 9 Delay Time of Staggered Output LXY28161 has a built in staggered circuit to perform delay mechanism 16 channels are divided to four groups Each output port has 25nS delay time so that the instant current from the power line will be lowered 2 10 Package Power Dissipation The maximum allowab
5. LXY28161 USER S MANUAL LXY28161 USER S MANUAL JULY 2008 V1 0 Pay attention to the last page SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD LXY28161 USER S MANUAL CONTENTS 1 E 0 3 12 210 1 1111 3 22 Basie Stuctire 3 2 2516 SPCC CAO e Esain 3 2 1 Block Diagram and Pin 3 22 5 2 3 Electrical Characteristics 06 6 24 Switching Characteristics Vpp 3V 7 2 9 Test Circuit for Switching Characteristics eiscescccsscascscsecsaccsavvsnevesabesysannsaeevoasboseeessvavetsanvaee 8 26 WAVETORIM 0s sccceccevessacersoctsresissasesoetancsessassseessnsvevesessensseesveeeseatescasrsersentsenseeeys 9 20601 0 Dui 9 2 6 2 Output Current Channel Timing Waveform 2 211111 26000000000 0500000000 9 24 Consin CUr bap diu dte mita Mr mU Ee ee idt 10 26 CHPIGTE a 10 2 9 Delay Time of Staggered 10 2 10 Package Power aika 10
6. Output Current vs oL AV Output Voltage 1 0V and 3 0V 0 1 0 5 V Regulation Ret 9100 21mA Output Current vs 9 dV Output Voltage 4 5V and 5 5V 1 0 5 0 96 V Regulation Pulldown Resistor down Resistor own Putco ests Gin OUTO OUT15 114 f Rext Open Off Ipp o eu CAR QUTIS Supply Current E of TS QUTIS PEL ud o OUT15 On e 947000179 QUTiS ime Ret 910 122 TTF Junction Temperature Temperature Junction Temperature 135 150 Thermal CO SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD 6 LXY28161 USER S MANUAL 2 4 Switching Characteristics Vpp 5V Setup Time DCLK tsut 1 ns Hold Time DCLK SDO adjustable DCLK output to the receiver end SDI of next driver IC GCLK 1 OUT4n OUT4n 1 025 Stagger OUT4n 2 2 Delay Ti Say T Touran 3 Propagation Delay Time Pulse Width Ports ndi Output Fall Time of Output Ports id Refer to the Timing Waveform when n 0 1 2 3 SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD 7 LXY28161 USER S MANUAL 2 5 Test Circuit for Switching Characteristics Test Circuit for Switching Characteristics Function Generator Logicinput Waveform uf F Li Pir II ie no rm c 42 WsGNDL 1 c SHENZHEN LINGXINYU S
7. age reducer lets VDS VLED VF VDROP Resistors or Zener diode can be used in the applications as shown in the following figures Voltage Supply Voltage Supply V V n o Vollage Supply V Lep LED a Mi 28161 22 LX 26161 2 14 Switching Noise Reduction LED drivers are frequently used in switch mode applications which always behave with switching noise due to the parasitic inductance on PCB To eliminate switching noise refer to Application Note for 8 bit and 16 bit LED Drivers Overshoot SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD 11 LXY28161 USER S MANUAL 2 15 Equivalent Circuits of Inputs and Outputs DCLK SDI terminal LE terminal VDD VDD OUT IN IN Equivalent circuits of Inputs and Outputs 3 Package Outline LXY2816 applies SOP 24 and TSSOP 24 package outline Ou mea ule SOP 24 Outline Drawing SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD 12 LXY28161 USER S MANUAL 2 21 0 04 ri i a m 0 SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD LXY28161 USER S MANUAL 4 Attention 4 1 The Rt value should satisfy Rt lt C Rf N 9 besides set the Otherwise there will be current difference between ICs which will effect the color uniformity value as small as possible GHD 2 Cay lay Lop boy eo l 2 3 4 5 5 T 8 VOU aaa
8. le package power dissipation is determined as Py max Tj Ta Ra Cj a When 16 output channels are turned on simultaneously the actual package power dissipation is P act IpxVy IonxDut yxVpsx16 Therefore to keep P act lt max the allowable maximum output current as a function of duty cycle is Iour Tj Ta RthG a pox Vpop DutyxVpsx16 Tj 150 The maximum power dissipation PD max Tj Ta Rth j a decreases as the ambient temperature increases So the LXY28161 must work in safe Operation Area 2 11 Usage of Thermal Pad PCB area L2xW2 is 4 times of the IC s area SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD 10 LXY28161 USER S MANUAL Copper foul 2 12 Thermal Protection Function The thermal protection function is enabled by default The output current will decrease to 25 As soon as the temperature is below 110 the thermal error flag will return to 0 and the output current will recover from the 25 current 2 13 LED Supply Voltage LXY28161 are designed to operate with VDS ranging from 0 4V to 0 8V depending on IOUT 5 60mA considering the package power dissipating limits VDS may be higher enough to make when VLED 5V PD act PD ao when VLED 5V and VDS VLED VF in which VLED is the load supply voltage In this case it is recommended to use the lowest possible supply voltage or to set an external voltage reducer VDROP A volt
9. patible with main trend 16 channel constant current IC in package 16 constant current output channels 16 bit color depth W PWM control Refresh rate up to 4800Hz Schmitt trigger input Staggered output delay reduce EMI Over temperature protection Constant output current range 5V 5 60mA Output current accuracy between channels 3 between ICs 6 Maximum data clock frequency 25MHz 5V supply voltage 1 2 Applied field LED video applications 1 3 Basic Structure Description LXY28161 mainly includes serial data input Wise Pulse Width Modulation constant current controlling circuit constant current output 2 LXY28161 Specification 2 1 Block Diagram and Pin Configuration LXY28161 applies SOP 24 and TSSOP 24 in package outline Block Diagram and Pin Configuration are as following diagrams CO SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD 3 LXY28161 USER S MANUAL Block Diagram lo Regulator and DAC Pin Configuration GND 501 CLK LE OUTO OUT1 OUT2 OUT3 OUT4 OUTS OUTS OUT OUTO OUT OUT14 OUT15 16 bit Shift Register FIFO YDD REXT SDO Nc OUT15 OUT14 OUT13 OUT12 QUT OUT10 OUTS OUTS SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD smej 10 19 18 31 LXY28161 USER S MANUAL Pin Name Pin No Type Function GND 1 Power Ground terminal for control BE SDI 2 Schmitt trigger Serial data input to the shift input regis
10. ter C 3 Schmitt trigger Clock input terminal for data input shift on rising edge 4 Schmitt trigger Data strobe terminal and input controlling command with DCLK OUTO 15 b 20 Output Constant current output terminal 5 60mA LK LB NC _ qq t ON SDO 22 Controllable 10ns 20ns 30ns selectable staggered Serial data output to the output delay receiver end SDI of next driver IC R EXT 25 Controlling Input terminal used to connect an external resistor for setting up output current for all output channels SV supply voltage terminal 2 2 Maximum Rating Symbol Supply Voltage Vin 0 4 Input Pin Voltage SDI VDD 0 4 ouput Current e BE Sustaining Voltage at OUT Port Data Clock Frequency DCLK GND Terminal Current 1000 R W W C W T 5 sme Ooo 2 E Power Dissipation L Type P 2 12 W Bb L3 Ww 40 485 C 55 150 C SHENZHEN LINGXINYU SCIENCE AND TECHNOLOGY CO LTD 5 LXY28161 USER S MANUAL 2 3 Electrical Characteristics Vpp 5 0V e e Tone Supply Voltage Seems De mcam 0 1 Refer to Test Circuit for 44 2 Electrical Characteristics Voltage L level meos S v spem pim e urren Output baton Voltage 6 60 eem Tr 1 0 8mA 0 EM
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