Delta Electronics S24SA User's Manual
Contents
1. Delphi Series S24SA 2 x1 Family m DC DC Power Modules 18 36Vin 1 8V 12A out The Delphi Series S24SA surface mountable 24V input single output isolated DC DC converter is the latest offering from a world leader in power system and technology and manufacturing Delta Electronics Inc This product family provides up to 36 watts of power or up to 12A of output current for output voltage 1 8V or below in a low profile 2 x1 industry standard form factor and pinout The S24SA operates from a wide input range of 18V to 36V output ranges from 1 2V to 12V For 1 8V at 12A full load the efficiency is up to 87 5 With creative design technology and optimization of component placement these converters possess outstanding electrical and thermal performance as well as extremely high reliability under highly stressful operating conditions All models are protected from abnormal input output voltage and current conditions and feature 2250V input output isolation and basic insulation DATASHEET DS S24SA1R812 05092006 FEATURES High efficiency 87 5 1 8V 12A Size 47 2mm x 29 5mm x 8 5mm 1 86 x 1 16 x 0 33 Low profile 0 33 Industry standard footprint and pin out Surface mountable Fixed frequency operation Input UVLO Output OCP OVP OTP No minimum load required 2 1 input voltage range Basic insulation 2250 isolation ISO 9001 TL 9000 ISO 14001 QS9000 OHSAS18001 certified manufacturing facilit2. OPTION OPTION o OPTION OPTION UI cl A Ro LO W L LO of N Vin Vin ON OFF al 7 Vin Vin ON OFF N Du 12 11 8 Ny 12 11 8 GE aire p O Q 92 35 0 093 DIA 3 35 00 1 378 SOLDER PLATED 35 00 1 578 1 378 D COPPER 6X 47 2 1 86 8 Sen 47 2 1 86 L a BOTTOM VIEW a 30TTOM VIEW E D S AY oz 2 2E E oj a zli W olz L gj S S ice 2 a CN i 0 SE rol Ae o Le Tra ee on RBE BER Tn 1 Ge Te 1 00 0 040 DIA g 120 0 12 CUSTOMER BOARD SOLDER PLATED COPPER ex WITH 2 4 0 09 SHOULDER SIDE VIEW SIDE VIEW NOTES DIMENSIONS ARE IN MILLIMETERS AND INCHES TOLERANCES X Xmm 0 5mm X XX in 0 02 in X XXmm 0 25mm X XXX in 0 010 in Pin No Name Function 1 Vout Positive output voltage 2 Vout Negative output voltage 6 Trim Output voltage trim 8 ON OFF ON OFF logic 11 Vin Negative input voltage 12 Vin Positive input voltage Optional Pin Name Function 4 Sense Option Positive sense pin 5 Sense Option Negative sense pin 12 DS S24SA1R812 05092006 Da PART NUMBERING SYSTEM 6S 2 s A 18 12 N R MAN A Form Input Number of Product Output Output ON OFF Pin Type Option Factor Voltage Outputs Series Voltage Current Logic Code S Small 24V S Single A Advanced 1R2 1 2V 03 3 0A N Negative R SMD F RoHS 6 6 A 6 pins no Power 1R5 1 5V 06 6 6A P Positive T Through Lead Free sense 1R8 1 8V 10 10A hole B 8 pin
3. Considerations The power module must be installed in compliance with the spacing and separation requirements of the end user s safety agency standard if the system in which the power module is to be used must meet safety agency requirements When the input source is 60Vdc or below the power module meets SELV safety extra low voltage requirements If the input source is a hazardous voltage which is greater than 60 Vdc and less than or equal to 75 Vdc for the modules output to meet SELV requirements all of the following must be met e The input source must be insulated from any hazardous voltages including the ac mains with reinforced insulation One Vi pin and one Vo pin are grounded or all the input and output pins are kept floating The input terminals of the module are not operator accessible A SELV reliability test is conducted on the system where the module is used to ensure that under a single fault hazardous voltage does not appear at the module s output Do not ground one of the input pins without grounding one of the output pins This connection may allow a non SELV voltage to appear between the output pin and ground DS S24SA1R812 05092006 This power module is not internally fused To achieve optimum safety and system protection an input line fuse is highly recommended The safety agencies require a normal blow fuse with 54 maximum rating to be installed in the ungrounded lead A lower rated fus
4. Inches Figure 17 Wind tunnel test setup figure DS S24SA1R812 05092006 PICK AND PLACE LOCATION SURFACE MOUNT TAPE amp REEL 47 2 1 86 e 23 40 0 921 F TOP COVER TAPE ma n 36 00 1 417 4 00 0 157 EMBOSSED CARRIER 9 40 0 370 z A ofotud Bask see L ect E Biro OU a A D Ya ce Oo een SIRIS W S a DIRECTION ol amp so S oe Es R l ES W 3 a 8 N Li 1 n ia ia P d 6 0 0 24 MIN AREA PICK AND PLACE LOCATION NOTES aa Kael A SS ALL DIMENSIONS ARE IN MILLIMETERS AND INCHES MODULES ARE SHIPPED IN QUANTITIES OF 120 PER REEL TOLERANCES X Xmm 0 5mm X XX in 0 02 in Ee X XXmm 0 25mm X XXX in 40 010 in X XXmm 0 25mm X XXX in 0 010 in RECOMMENDED PAD LAYOUT SMD 47 2 1 86 Lo a l SE TO O O l of 3 12 11 8 3 A itin vin ON OFF sl W SENSE SENSE mpn o fs de Vout Vout OPTION OPTION TRIM N X 2 4 3 6 n Q ee a 3 6 0 14 2 80 0 110 PAD 9X 5 00 0 191 3x RECOMENDED P W B PAD LAYOUT NOTES DIMENSIONS ARE IN
5. MILLIMETERS AND INCHES TOLERANCES X Xmm 0 5mm X XX in 0 02 in X XXmm 0 25mm X XXX in 0 010 in DS S24SA1R812 05092006 Sy LEADED Sn Pb PROCESS RECOMMEND TEMP PROFILE 2nd Ramp up temp Peak temp 210 230 C Ssec 250 1 0 3 0 C sec Pre heat temp S 2007 140 180 C 60 120 sec 2 Ramp up temp Cooling down rate lt 3 C sec 150 zu 0 5 3 0 sec SS Over 200 C 50 A 40 50sec ee Sen venn 0 60 120 180 240 300 Time sec Note The temperature refers to the pin of S24SA measured on the pin Vout joint LEAD FREE SAC PROCESS RECOMMEND TEMP PROFILE e rain En Ramp down A max 4 C sec 200 C 5 150 C Preheat time 100 140 sec Time Limited 90 sec above 217 C Ramp up max 3 C sec 25 C Time Note The temperature refers to the pin of S24SA measured on the pin Vout joint DS S24SA1R812 05092006 MECHANICAL DRAWING Surface mount module Through hole module 40 00 1 575 40 00 1 575 3 6 0 14 __ 5 00 0 191 3 6 0 14 52 00 0 191 TYP TYP So SOO r do ERC a ol N 1 2 4 5 6 CH 1 2 Ji pe 16 wo ei Vout Vout SENSE SENSE TRIM oi m Vout Vout SENSE SENSE TRIM oO
6. power Figure 15 Circuit configuration for trim down decrease output voltage If the external resistor is connected between the TRIM and Vo pins the output voltage set point decreases The external resistor value required to obtain a percentage of output voltage change A Vo 6 is defined as Rtrim down E 104 KQ A Vo Yo Ex When trim down 10 1 8V X 0 9 1 62V Rtrim down Weg 104 4 9 KQ Figure 16 Circuit configuration for trim up increase output voltage If the external resistor is connected between the TRIM and Vo pins the output voltage set point increases The external resistor value required to obtain a percentage output voltage change A Vo 6 is defined as DS S24SA1R812 05092006 Sa A w THERMAL CONSIDERATIONS THERMAL CURVES Thermal management is an important part of the system BS m design To ensure proper reliable operation sufficient SS Se Aaa SET 0 15 cooling of the power module is needed over the entire MADI fant ot CS temperature range of the module Convection cooling is Busually the dominant mode of heat transfer de Hence the choice of equipment to characterize the E thermal performance of the power module is a wind gt tunnel Thermal Testing Setup Delta s DC DC power modules are characterized in heated vertical wind tunnels that simulate the thermal Figure 18 Hot spot temperature measured point environments encounte
7. still exists the module will shut down again This restart trial will continue until the fault condition is corrected Over Temperature Protection The over temperature protection consists of circuitry that provides protection from thermal damage If the temperature exceeds the over temperature threshold the module will shut down The module will try to restart after shutdown If the over temperature condition still exists during restart the module will shut down again This restart trial will continue until the temperature is within specification Remote On Off The remote on off feature on the module can be either negative or positive logic Negative logic turns the module on during a logic low and off during a logic high Positive logic turns the modules on during a logic high and off during a logic low Remote on off can be controlled by an external switch between the on off terminal and the Vi terminal The switch can be an open collector or open drain For negative logic if the remote on off feature is not used please short the on off pin to Vi For positive logic if the remote on off feature is not used please leave the on off pin floating 4SA1R812_05092006 Figure 13 Remote on off implementation Remote Sense Optional Remote sense compensates for voltage drops on the output by sensing the actual output voltage at the point of load The voltage between the remote sense pins and the output terminals mus
8. a 25 C Airflow 200LFM 5 7 M hours Weight 18 grams Over Temperature Shutdown Please refer to Fig 18 For measuring point 115 C DS S24SA1R812 05092006 ELECTRICAL CHARACTERISTICS CURVES EFFICIENCY 0 1 2 4 6 8 10 12 OUTPUT CURRENT A Figure 1 Efficiency vs load current for minimum nominal and maximum input voltage at 25 C 1 60 1 40 INPUT CURRENT A 1 20 1 00 0 80 0 60 0 40 0 20 0 00 INPUT VOLTAGE V Figure 3 Typical input characteristics at room temperature DS S24SA1R812 05092006 POWER DISSIPATION W 0 1 2 4 6 8 10 12 OUTPUT CURRENT A Figure 2 Power dissipation vs load current for minimum nominal and maximum input voltage at 25 C NORMS00kS s ams div Stopped 2ms div CHI SY CH2 1 DC 11 DC 1 1 Ja Figure 4 Turn on transient at full rated load current 2 ms div Top Trace Vout 1V div Bottom Trace ON OFF Control 5V div Ka ELECTRICAL CHARACTERISTICS CURVES NORMS00kS s 2ms di Stopped q 2ms div CHISEN CH2 1V ki DC ii DC 1 1 Figure5 Turn on transient at zero load current 2 ms div Top Trace Vout 1mV div Bottom Trace ON OFF Control 5V div NORM 2MS s 500us div 500us div Stopped q CH2 50m Z CMM AG 1 1 i DC 1 1 alen Zeneneeeg a kebek iis ako akasan est kkas Figure 7 Output voltage response to step change in loa
9. capacitor and 10uF tantalum capacitor Bandwidth 20 MHz DS S24SA1R812 05092006 RESISTIVE LOAD Figure 10 Output voltage noise and ripple measurement test setup Scope measurement should be made using a BNC cable length shorter than 20 inches Position the load between 51 mm to 76 mm 2 inches to 3 inches from the module 2 0 1 8 1 6 1 4 1 2 1 0 0 8 0 6 0 4 0 2 OUTPUT VOLTAGE V 0 0 e vin z4v 0 0 5 0 10 0 15 0 20 0 LOAD CURRENT A Figure 12 Output voltage vs load current showing typical current limit curves and converter shutdown points ka DESIGN CONSIDERATIONS Input Source Impedance The impedance of the input source connecting to the DC DC power modules will interact with the modules and affect the stability A low ac impedance input source is recommended If the source inductance is more than a few uH we advise adding a 10 to 100 uF electrolytic capacitor ESR lt 0 7 Q at 100 kHz mounted close to the input of the module to improve the stability Layout and EMC Considerations Delta s DC DC power modules are designed to operate in a wide variety of systems and applications For design assistance with EMC compliance and related PWB layout issues please contact Delta s technical support team An external input filter module is available for easier EMC compliance design Application notes to assist designers in addressing these issues are pending release Safety
10. d current 75 50 of lo max di dt 0 1A us Load cap 10uF 100 MQ ESR tantalum capacitor and 1uF ceramic capacitor Top Trace Vout 50mV div Bottom Trace lout SA div DS S24SA1R812 05092006 NORM 2MS s 500us div 500us div CH4 10m Stopped q CH2 50m A 11 i DC 1 1 Figure 6 Output voltage response to step change in load current 50 75 of lo max di dt 0 1A us Load cap 10uF 100 mM ESR tantalum capacitor and 1uF ceramic capacitor Top Trace Vout 50mV div Bottom Trace lout 5A div is gt LYVYYVY L Cs 220uF Cs 100uF ESR lt 0 10 ESR lt 0 50 20 C 100KHZ 20 C 100KHZ Figure 8 Test set up diagram showing measurement points for Input Reflected Ripple Current Figure 9 Note Measured input reflected ripple current with a simulated source Inductance rel of 12 uH Capacitor Cs offset possible battery impedance Sa A w ELECTRICAL CHARACTERISTICS CURVES NORM 10065 s 2us div Stopped q 2us div S a i CHIE Ten AC 1 1 Figure 9 Input Reflected Ripple Current is at full rated output current and nominal input voltage with 12uH source impedance and 100uF electrolytic capacitor 2 mA div NORM 200MS s 2us div Stopped q 2us div 7 CH2S10mY i AC 11 Figure 11 Output voltage ripple at nominal input voltage and rated load current 10 mV div Load capacitance 1uF ceramic
11. e can be used based on the maximum inrush transient energy and maximum input current Soldering and Cleaning Considerations Post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing Inadequate cleaning and or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test Adequate cleaning and or drying is especially important for un encapsulated and or open frame type power modules For assistance on appropriate soldering and cleaning procedures please contact Delta s technical support team gt DS S2 FEATURES DESCRIPTIONS Over Current Protection The modules include an internal output over current protection circuit which will endure current limiting for an unlimited duration during output overload If the output current exceeds the OCP set point the modules will automatically shut down hiccup mode The modules will try to restart after shutdown If the overload condition still exists the module will shut down again This restart trial will continue until the overload condition is corrected Over Voltage Protection The modules include an internal output over voltage protection circuit which monitors the voltage on the output terminals If this voltage exceeds the over voltage set point the module will shut down Hiccup mode The modules will try to restart after shutdown If the fault condition
12. in 18V to36V 2 5 mV Over Temperature Ta 40 C to 85 C 100 300 ppm C Total Output Voltage Range Over sample load line and temperature 1 73 1 87 V Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth Peak to Peak Full Load 1uF ceramic 10uF tantalum 20 50 mV RMS Full Load 1uF ceramic 10uF tantalum 5 15 mV Operating Output Current Range 0 12 A Output DC Current Limit Inception Output Voltage 10 Low 13 2 18 A MDYNAMIC CHARACTERISTICS Output Voltage Current Transient 24V 10uF Tan amp 1uF Ceramic load cap 0 1A ps Positive Step Change in Output Current 50 lo max to 75 lo max 30 75 mV Negative Step Change in Output Current 75 lo max to 50 lo max 30 75 mV Settling Time to 1 of Final value 200 us Turn On Transient Start Up Time From On Off Control 12 ms Start Up Time From Input 12 ms Maximum Output Capacitance Full load 5 overshoot of Vout at startup 2200 uF 100 Load 87 5 Isolation Voltage 2250 V Isolation Resistance 10 MQ Isolation Capacitance 1500 pF Switching Frequency 330 kHz ON OFF Control Logic Low Module ON Logic Low Von off at lon off 1 0mA 0 0 8 V Logic High Von off at lon off 0 0 pA 15 V ON OFF Current lon off at Von off 0 0V 1 mA Leakage Current Logic High Von off 15V 50 uA Output Voltage Trim Range Across Trim Pin amp Vo or Vo Pout lt max rated 10 10 Yo Output Over Voltage Protection Hiccup Over full temp range of nominal Vout 115 160 GENERAL SPECIFICATIONS Calculated MTBF lo 80 of lo max T
13. red in most electronics The allowed maximum hot spot temperature is defined at 110 C equipment This type of equipment commonly uses vertically mounted circuit cards in cabinet racks in which the power modules are mounted 24SA1R812NR Standard Output Current vs Ambient Temperature and Air Velocity Output Current A Either Orientation The following figure shows the wind tunnel characterization setup The power module is mounted on a test PWB and is vertically positioned within the wind tunnel The space between the neighboring PWB and the top of the power module or a heat sink is Natural Convection 6 35mm 0 25 F De n A a O E pe Dam 100LFM 200LFM Thermal Derating oi E alee tet Ee 400LFM Heat can be removed by increasing airflow over the E e ee ee aaa module The module s maximum hot spot temperature is 110 C To enhance system reliability the power module d J should always be operated below the maximum Ambient Temperature C operating temperature If the temperature exceeds the P l l maximum module temperature reliability of the unit may Figure 19 Output current vs ambient temperature and air velocity be affected Either Orientation FACING PWB 1 PWB MODULE AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW i THE MODULE i 50 8 2 0 AIR FLOW pA o F le 10 0 4 Note Wind Tunnel Test Setup Figure Dimensions are in millimeters and
14. s with 2R5 2 5V 12 12A sense MODEL LIST MODEL NAME INPUT OUTPUT EFF 100 LOAD 22K S24SA1R512NRFA 18V 36V 2 2A 1 5V 12A 87 0 S24SA1R612NRFA H S24SA2R510NRFA 18V 36V 88 5 87 S24SA05006NRFA 18V 36V 90 0 S24SA3R310NRFA 18V 36V 90 0 S24SA12003NRFA 18V 36V 89 5 CONTACT www delta com tw dcdc USA Europe Asia amp the rest of world Telephone Phone 41 31 998 53 11 Telephone 886 3 4526107 ext 6220 East Coast 888 335 8201 f Fax 886 3 4513485 West Coast 888 335 8208 A Email DCDC delta com tw Fax 978 656 3964 Email DCDC delta es com Email DCDC delta corp com WARRANTY Delta offers a two 2 year limited warranty Complete warranty information is listed on our web site or is available upon request from Delta Information furnished by Delta is believed to be accurate and reliable However no responsibility is assumed by Delta for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or patent rights of Delta Delta reserves the right to revise these specifications at any time without notice DS S24SA1R812 05092006
15. t not exceed the output voltage sense range given here Vo Vo SENSE SENSE lt 10 x Vout This limit includes any increase in voltage due to remote sense compensation and output voltage set point adjustment trim Figure 14 Effective circuit configuration for remote sense operation If the remote sense feature is not used to regulate the output at the point of load please connect SENSE to Vo and SENSE to Vo at the module The output voltage can be increased by both the remote sense and the trim however the maximum increase is the larger of either the remote sense or the trim not the sum of both When using remote sense and trim the output voltage of the module is usually increased which increases the power output of the module with the same output current Care should be taken to ensure that the maximum output power does not exceed the maximum rated power a W FEATURES DESCRIPTIONS CON ap en dK AVo m Output Voltage Adjustment TRIM Ex When trim up 10 1 8V X 1 1 1 98V To increase or decrease the output voltage set point the modules may be connected with an external resistor 23 8 100 10 1089 between the TRIM pin and either the Vo or Vo The rm up 10 104 48 9 KQ TRIM pin should be left open if this feature is not used Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated
16. y UL cUL 60950 US amp Canada recognized and TUV EN60950 certified OPTIONS Positive on off logic SMD or Through hole mounting APPLICATIONS Telecom DataCom Wireless Networks Optical Network Equipment Server and Data Storage Industrial Test Equipment AA NELTA Delta Electronics Inc TECHNICAL SPECIFICATIONS TA 25 C airflow rate 200 LFM Vin 24Vdc nominal Vout unless otherwise noted PARAMETER NOTES and CONDITIONS S24SA1R812NRFA Min Typ Max Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 0 3 50 Vdc Operating Temperature Please refer to Fig 18 For measuring point 40 110 C Storage Temperature 55 125 C Input Output Isolation Voltage 2250 Vdc Operating Input Voltage 18 24 36 V Input Under Voltage Lockout Turn On Voltage Threshold 17 18 V Turn Off Voltage Threshold 13 15 V Lockout Hysteresis Voltage 1 2 3 V Maximum Input Current 100 Load 18Vin 2 2 A No Load Input Current 50 mA Off Converter Input Current 7 mA Inrush Current I t 0 01 A s Input Reflected Ripple Current P P thru 12pH inductor 5Hz to 20MHz 5 mA Input Voltage Ripple Rejection 120 Hz 50 dB Output Voltage Set Point Vin 24V lo 50 lo max Ta 25 C 1 77 1 80 183 vi Output Voltage Regulation Over Load lo lo min to lo max 2 10 mV Over Line V
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