dat date e 03/19/2013 page page 1 of 6 1 of 6 SERIES: PDS1-S │ DESCRIPTION: DC-DC CONVERTER FEATURES • 1 W isolated output • smaller package • single unregulated output • 1,500 Vdc isolation • continuous short circuit protection • extended temperature range (-40~105°C) • antistatic protection up to 8kV • high efficiency at light load • efficiency up to 82% input output output output ripple efficiency MODEL 1 voltage voltage current power and noise typ range min max max typ typ (Vdc) (Vdc) (Vdc) (mA) (mA) (W) (mVp-p) (%) PDS1-S3-S3-S 3.3 2.97~3.63 3.3 30 303 1 30 80 PDS1-S3-S5-S 3.3 2.97~3.63 5 20 200 1 30 80 PDS1-S5-S3-S 5 4.5~5.5 3.3 30 303 1 30 80 PDS1-S5-S5-S 5 4.5~5.5 5 20 200 1 30 80 PDS1-S5-S9-S 5 4.5~5.5 9 12 111 1 30 80 PDS1-S5-S12-S 5 4.5~5.5 12 9 83 1 30 81 PDS1-S5-S15-S 5 4.5~5.5 15 7 67 1 60 81 PDS1-S5-S24-S 5 4.5~5.5 24 4 42 1 60 81 PDS1-S12-S5-S 12 10.8~13.2 5 20 200 1 30 80 PDS1-S12-S9-S 12 10.8~13.2 9 12 111 1 30 80 PDS1-S12-S12-S 12 10.8~13.2 12 9 83 1 30 81 PDS1-S12-S15-S 12 10.8~13.2 15 7 67 1 60 80 PDS1-S15-S5-S 15 13.5~16.5 5 20 200 1 30 80 PDS1-S15-S15-S 15 13.5~16.5 15 6 67 1 60 81 PDS1-S24-S3-S 24 21.6~26.4 3.3 30 303 1 30 80 PDS1-S24-S5-S 24 21.6~26.4 5 20 200 1 30 80 PDS1-S24-S9-S 24 21.6~26.4 9 12 111 1 30 80 PDS1-S24-S12-S 24 21.6~26.4 12 9 83 1 30 81 PDS1-S24-S15-S 24 21.6~26.4 15 7 67 1 60 82 PDS1-S24-S24-S 24 21.6~26.4 24 4 42 1 60 82 Notes: 1. ripple and noise are measured at 20 MHz BW by “parallel cable” method cui.com CUI Inc │ SERIES: PDS1-S │ DESCRIPTION: DC-DC CONVERTER date 03/19/2013 │ page 2 of 6 PART NUMBER KEY PDS1 - SXX - SXX -S Packaging Style Base Number Input Voltage Output Voltage SIP INPUT parameter conditions/description min typ max units 3.3 V input models 2.97 3.3 3.63 Vdc 5 V input models 4.5 5 5.5 Vdc operating input voltage 12 V input models 10.8 12 13.2 Vdc 15 V input models 13.5 15 16.5 Vdc 24 V input models 21.6 24 26.4 Vdc for maximum of 1 second 3.3 V input models -0.7 5 Vdc 5 V input models -0.7 9 Vdc surge voltage 12 V input models -0.7 18 Vdc 15 V input models -0.7 21 Vdc 24 V input models -0.7 30 Vdc filter capacitance filter OUTPUT parameter conditions/description min typ max units for Vin change of 1% line regulation 3.3 V model ±1.5 % all other models ±1.2 % measured from 10% load to full load load regulation 3.3 V model 20 % all other models 15 % voltage accuracy see tolerance envelope curve switching frequency 100% load, nominal input voltage 100 300 kHz temperature coefficient 100% load ±0.03 %/°C PROTECTIONS parameter conditions/description min typ max units short circuit protection continuous, automatic recovery SAFETY AND COMPLIANCE parameter conditions/description min typ max units isolation voltage for 1 minute at 1 mA max. 1,500 Vdc isolation resistance at 500 Vdc 1,000 MΩ conducted emissions CISPR22/EN55022, class B (external circuit required) ESD IEC/EN61000-4-2, class B, contact ±8KV MTBF MIL-HDBK-217F @ 25°C 3,500,000 hours RoHS compliant yes cui.com CUI Inc │ SERIES: PDS1-S │ DESCRIPTION: DC-DC CONVERTER date 03/19/2013 │ page 3 of 6 ENVIRONMENTAL parameter conditions/description min typ max units operating temperature see derating curve -40 105 °C storage temperature -55 125 °C storage humidity non-condensing 95 % temperature rise at full load 25 °C SOLDERABILITY parameter conditions/description min typ max units hand soldering 1.5 mm from case for 10 seconds 300 °C wave soldering see wave soldering profile 260 °C Peak Temp. 260°C Max. Wave Soldering Time 250 4 Sec. Max. 200 10 Sec. Max. 150 100 50 0 MECHANICAL Time (sec.) parameter conditions/description min typ max units dimensions 11.6 x 6.00 x 10.0 (0.461 x 0.236 x 0.394 inch) mm case material plastic (UL94-V0) weight 1.2 g MECHANICAL DRAWING units: mm[inch] tolerance: ±0.25[±0.010] pin section tolerance: ±0.10[±0.004] Grid Size: 10.0 [0.394] 2.54mm x 2.54mm 12 34 4.10 [0.161] Ø1.00 [0.059] PCB Layout Top View 7.62 [0.300] Front View PIN CONNECTIONS 11.6 [0.461] PIN function 0.90 [0.035] 0.50 [0.020] 6.00 [0.236] 1 GND 2 Vin 1 2 34 3 0V 4 +Vo Bottom View cui.com 0.30 [0.012] 0.50 [0.020] Temperature (°C) Typical Load Line CUI Inc │ SERIES: PDS1-S │ DESCRIPTION: DC-DC CONVERTER date 03/19/2013 │ page 4 of 6 DERATING CURVES Tolerance Envelope Curve Temperature Derating Curve 10 7.5 100 5 80 2.5 2.5 Rated Output Voltage 0 60 -2.5 -2.5 Safe operating area 40 -5 -7.5 20 -7.5 -10 10 20 30 40 50 60 70 80 90 100 -40-20 0204060 85 105 120 Output Current Percentage (%) Ambient Temperature (°C) (Nominal Input Voltage) EMC RECOMMENDED CIRCUIT LDM Recommended external circuit components Vin Vin +Vo Vin C1 LDM C2 (Vdc) EUT LOAD C1 3.3 475K/50V 6.8μH NC GND GND 0V 5 475K/50V 6.8μH NC 12 475K/50V 6.8μH NC 15 475K/50V 6.8μH 470pF/2kV C2 24 475K/50V 6.8μH 470pF/2kV TEST CONFIGURATION Oscilloscope Lin External components Lin 4.7μH Current Cin Probe DC Load DC 220μF, ESR < 1.0Ω Cin at 100 KHz Note: Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance. cui.com Output Voltage Accuracy (%) Load (%) CUI Inc │ SERIES: PDS1-S │ DESCRIPTION: DC-DC CONVERTER date 03/19/2013 │ page 5 of 6 APPLICATION NOTES 1. Output load requirement To ensure this module can operate efficiently and reliably, the minimum output load may not be less than 10% of the full load during operation. If the actual output power is low, connect a resistor at the output end in parallel to increase the load. 2. Overload Protection Under normal operating conditions, the output circuit of this product has no protection against overload. The simplest method to add this is to add a circuit breaker to the circuit. 3. Recommended circuit If you want to further decrease the input/output ripple, you can increase the capacitance accordingly or choose capacitors with low ESR (see Figure 1). However, the capacitance of the output filter capacitor must be appropriate. If the capacitance is too high, a startup problem might arise. For every channel of the output, to ensure safe and reliable operation, the maximum capacitance must be less than the maximum capacitive load (see Table 1). +Vo Vin Figure 1 Cout Cin DC DC GND 0V Vin Cin Vo Cout (Vdc) (µF) (Vdc) (µF) 3.3 4.7 3.3 10 5 4.7 5 10 Table 1 12 2.2 9 4.7 15 1 12 2.2 24 1 15 1 -- -- 24 0.47 It’s not recommended to connect any external capacitors in applications with less than 0.5 watt output. 4. Output Voltage Regulation and Over-voltage Protection Circuit The device for output voltage regulation, over-voltage and over-current protection is a linear regulator and a capacitor filtering net- work with overheat protection which can be connected to the input or output end in series (see Figure 2). The recommended capaci- tance of its filter capacitor (see Table 1), and the linear regulator is based on the actual voltage and current required. +Vo REG Vin REG Figure 2 DC DC GND 0V Note: 1. Operation under minimum load will not damage the converter; however, they may not meet all specifications listed. 2. Max. capacitive load tested at input voltage range and full load. 3. All specifications measured at: Ta=25°C, humidity<75%, nominal input voltage and rated output load, unless otherwise specified. cui.com CUI Inc │ SERIES: PDS1-S │ DESCRIPTION: DC-DC CONVERTER date 03/19/2013 │ page 6 of 6 REVISION HISTORY rev. description date 1.0 initial release 03/19/2013 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 20050 SW 112th Ave. Fax 503.612.2383 Tualatin, OR 97062 cui.com 800.275.4899 techsupport@cui.com CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website. CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use. CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.