For more information, please visit the product page. date 06/16/2015 page 1 of 8 SERIES: PYB20-T & PYB20-U │ DESCRIPTION: DC-DC CONVERTER FEATURES • • • • • • • • • • • up to 20 W isolated output industry standard pinout 4:1 input range (9~36 Vdc, 18~75 Vdc) smaller package single/dual regulated outputs 1,500 Vdc isolation continuous short circuit, over current protection, over voltage protection reverse polarity protection on chassis mount (-T) models temperature range (-40~85°C) six-sided metal shielding efficiency up to 90% MODEL input voltage output voltage output current output power ripple and noise1 efficiency2 typ (Vdc) range (Vdc) (Vdc) min (mA) max (mA) max (W) max (mVp-p) typ (%) PYB20-Q24-S3 24 9~36 3.3 250 5000 16.5 100 86 PYB20-Q24-S5 24 9~36 5 200 4000 20 100 90 PYB20-Q24-S12 24 9~36 12 84 1667 20 100 89 PYB20-Q24-S15 24 9~36 15 67 1333 20 100 90 PYB20-Q24-S24 24 9~36 24 42 834 20 100 90 PYB20-Q24-D5 24 9~36 ±5 ±100 ±2000 20 100 86 PYB20-Q24-D12 24 9~36 ±12 ±42 ±834 20 100 88 PYB20-Q24-D15 24 9~36 ±15 ±33 ±667 20 100 88 PYB20-Q48-S3 48 18~75 3.3 250 5000 16.5 100 86 PYB20-Q48-S5 48 18~75 5 200 4000 20 100 90 PYB20-Q48-S12 48 18~75 12 84 1667 20 100 89 PYB20-Q48-S15 48 18~75 15 67 1333 20 100 90 PYB20-Q48-S24 48 18~75 24 42 834 20 100 90 PYB20-Q48-D5 48 18~75 ±5 ±100 ±2000 20 100 86 PYB20-Q48-D12 48 18~75 ±12 ±42 ±834 20 100 88 PYB20-Q48-D15 48 18~75 ±15 ±33 ±667 20 100 89 Notes: 1. Ripple and noise are measured at 20 MHz BW by “parallel cable” method with 1 µF ceramic and 10 µF electrolytic capacitors on the output. 2. Efficiency is approximately 2% lower for chassis mount (-T) models. PART NUMBER KEY PYB20 - QXX - XXX - X - X Mounting Type T = Chassis mount U = U-frame Base Number Input Voltage Output S = single D = dual Output Voltage cui.com Heatsink "blank" = no heatsink H = with heatsink For more information, please visit the product page. CUI Inc │ SERIES: PYB20-T & PYB20-U │ DESCRIPTION: DC-DC CONVERTER date 06/16/2015 │ page 2 of 8 INPUT parameter conditions/description operating input voltage 24 Vdc input models 48 Vdc input models min typ max units 9 18 24 48 36 75 Vdc Vdc start-up voltage 24 Vdc input models 48 Vdc input models 9 17.8 Vdc Vdc under voltage shutdown1 24 Vdc input models 48 Vdc input models 7.5 16 surge voltage for maximum of 1 second 24 Vdc input models 48 Vdc input models -0.7 -0.7 start-up time nominal input, constant load filter pi filter Vdc Vdc 50 100 Vdc Vdc 10 ms 1 mA models ON (CTRL open or connect TTL high level, 2.5~12 Vdc) CTRL models OFF (CTRL connect GND or low level, 0~1.2 Vdc) 2 input current (models OFF) Notes: 1. Contact CUI if you are planning to use this feature in your application. 2. CTRL pin voltage is referenced to GND. OUTPUT parameter conditions/description typ max units line regulation full load, input voltage from low to high min ±0.2 ±0.5 % load regulation 5% to 100% load ±0.5 ±1 % cross regulation dual output models: main output 50% load, secondary output from 10% to 100% load ±5 % ±1 ±3 % ±0.5 ±1 % voltage accuracy voltage balance 3 dual output, balanced loads adjustability4 ±10 % kHz switching frequency PWM mode 300 transient recovery time 25% load step change 300 500 μs transient response deviation 25% load step change ±3 ±5 % temperature coefficient 100% load ±0.02 %/°C max units Note: 3. For dual output models, unbalanced loads should not exceed ±5%. If ±5% is exceeded, it may not meet all specifications. 4. Output trimming available on single output models only. PROTECTIONS parameter conditions/description short circuit protection hiccup, continuous, automatic recovery min over current protection over voltage protection 3.3 Vdc output models 5 Vdc output models 12 Vdc output models 15 Vdc output models 24 Vdc output models typ 160 % 3.9 6.2 15 18 30 Vdc Vdc Vdc Vdc Vdc SAFETY AND COMPLIANCE parameter conditions/description min isolation voltage for 1 minute at 1 mA max. 1,500 Vdc isolation resistance at 500 Vdc 1,000 MΩ cui.com typ max units For more information, please visit the product page. CUI Inc │ SERIES: PYB20-T & PYB20-U │ DESCRIPTION: DC-DC CONVERTER date 06/16/2015 │ page 3 of 8 SAFETY AND COMPLIANCE (CONTINUED) parameter conditions/description conducted emissions CISPR22/EN55022, class A, class B (external circuit required, see Figure 1-b) min typ radiated emissions CISPR22/EN55022, class A, class B (external circuit required, see Figure 1-b) ESD IEC/EN61000-4-2, class B, contact ± 4kV radiated immunity IEC/EN61000-4-3, class A, 10V/m EFT/burst IEC/EN61000-4-4, class B, ± 2kV (external circuit required, see Figure 1-a) surge IEC/EN61000-4-5, class B, ± 2kV (external circuit required, see Figure 1-a) conducted immunity IEC/EN61000-4-6, class A, 3 Vr.m.s voltage dips & interruptions IEC/EN61000-4-29, class B, 0%-70% MTBF as per MIL-HDBK-217F @ 25°C RoHS 2011/65/EU max 1,000,000 units hours ENVIRONMENTAL parameter conditions/description min operating temperature see derating curves storage temperature storage humidity non-condensing case temperature at full load, Ta=71°C vibration 10~55 Hz for 30 min. along X, Y and Z axis typ max units -40 85 °C -55 125 °C 5 95 % 105 °C 10 G MECHANICAL parameter conditions/description min dimensions chassis mount: 76 x 31.5 x 21.2 chassis mount with heatsink: 76 x 31.5 x 25.10 U-Frame: 52.32 x 54.99 x 19.05 U-Frame with heatsink: 52.32 x 54.99 x 22.90 case material aluminum alloy weight chassis mount chassis mount with heatsink U-Frame U-Frame with heatsink typ units mm mm mm mm 50 58 58 66 cui.com max g g g g For more information, please visit the product page. CUI Inc │ SERIES: PYB20-T & PYB20-U │ DESCRIPTION: DC-DC CONVERTER date 06/16/2015 │ page 4 of 8 MECHANICAL DRAWING CHASSIS MOUNT units: mm[inch] tolerance: ±0.50[±0.02] wire range: 24~12 AWG PIN CONNECTIONS PIN Single Output Dual Output 1 CTRL CTRL 2 GND GND 3 Vin Vin 4 0V -Vo 5 Trim 0V 6 +Vo +Vo Top View Front View CHASSIS MOUNT WITH HEATSINK units: mm[inch] tolerance: ±0.50[±0.02] wire range: 24~12 AWG PIN CONNECTIONS PIN Single Output Dual Output 1 CTRL CTRL 2 GND GND 3 Vin Vin 4 0V -Vo 5 Trim 0V 6 +Vo +Vo Top View Front View cui.com For more information, please visit the product page. CUI Inc │ SERIES: PYB20-T & PYB20-U │ DESCRIPTION: DC-DC CONVERTER date 06/16/2015 │ page 5 of 8 MECHANICAL DRAWING (CONTINUED) U-FRAME units: mm[inch] tolerance: ±0.50[±0.02] wire range: 22~14 AWG DIN-rail mounting kit available (part# STK-DIN) 54.99 2.165 4.75 0.187 (2 PLCS) 0.079 X 0.157 [2.01 X 3.99] (2 PLCS) 3.51 0.138 (2 PLCS) 20.32 0.800 0.010 (2 PLCS) PIN CONNECTIONS PIN Single Output Dual Output 1 GND GND 2 Vin Vin 3 CTRL CTRL 4 Case Case 5 NC NC 6 +Vo +Vo 7 Trim 0V 8 0V -Vo 52.32 2.060 1 2 3 4 5 6 7 8 1.00 0.039 (TYP) 34.93 1.375 0.010 34.01 1.339 0.010 9.16 0.361 0.010 Top View 5.21 0.205 (2 PLCS) 12.19 0.480 33.02 1.300 0.010 (2 PLCS) 10.99 0.433 0.010 (2 PLCS) 52.99 2.086 R1.76 0.069 (2 PLCS) 5.31 0.209 (5 PLCS) M3X4 (5 PLCS) Bottom View 19.05 0.750 4.01 0.158 0.010 (TYP) Front View U-FRAME WITH HEATSINK units: mm[inch] tolerance: ±0.50[±0.02] wire range: 22~14 AWG DIN-rail mounting kit available (part# STK-DIN) 54.99 2.165 4.75 0.187 (2 PLCS) 0.079 X 0.157 [2.01 X 3.99] (2 PLCS) 3.51 0.138 (2 PLCS) 20.32 0.800 0.010 (2 PLCS) PIN CONNECTIONS PIN Single Output Dual Output 1 GND GND 2 Vin Vin 3 CTRL CTRL 4 Case Case 5 NC NC 6 +Vo +Vo 7 Trim 0V 8 0V -Vo 52.32 2.060 1 2 3 4 5 6 7 8 1.00 0.039 (TYP) 5.21 0.205 (2 PLCS) 52.99 2.086 10.99 0.433 0.010 (2 PLCS) 22.90 0.902 4.01 0.158 0.010 (TYP) Front View cui.com 34.93 1.375 0.010 34.01 1.339 0.010 9.16 0.361 0.010 Top View R1.76 0.069 (2 PLCS) 12.19 0.480 33.02 1.300 0.010 (2 PLCS) Bottom View 5.31 0.209 (5 PLCS) M3X4 (5 PLCS) For more information, please visit the product page. CUI Inc │ SERIES: PYB20-T & PYB20-U │ DESCRIPTION: DC-DC CONVERTER date 06/16/2015 │ page 6 of 8 DERATING CURVES With heatsink 100 Load (%) 80 Without heatsink 60 Safe operating area 40 20 -40 -20 0 20 40 55 60 85 Ambient Temperature (°C) EMC RECOMMENDED CIRCUIT Table 1 Figure 1 Vin LDM1 FUSE CY1 Vin C0 M OV GND Recommended external circuit components Vin (Vdc) (a) + DC / DC C1 (b) GND CY2 FUSE +Vo Cout LOAD -Vo ( 0 V) MOV 48 Choose according to input current S14K35 S14K60 LDM1 4.7μH 4.7μH C0 330μF/50V 330μF/100V C1 1μF/50V 1μF/100V CY1 1nF/2kV 1nF/2kV CY2 1nF/2kV 1nF/2kV Note: cui.com 24 1. See Table 2 for Cout values. For more information, please visit the product page. CUI Inc │ SERIES: PYB20-T & PYB20-U │ DESCRIPTION: DC-DC CONVERTER date 06/16/2015 │ page 7 of 8 APPLICATION NOTES 1. Recommended circuit This series has been tested according to the following recommended testing circuit before leaving the factory. This series should be tested under load (see Figure 2). If you want to further decrease the input/output ripple, you can increase the capacitance accordingly or choose capacitors with low ESR (see Table 2). 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 3). Figure 2 Single Output Dual Output Vin +Vo Vin Cin DC DC DC Cin Cou t 0V GND Cin (µF) Cout (µF) 3.3 100 470 -- 5 100 470 ±5 12 100 220 ±12 15 100 220 ±15 100 100 -- 24 0V Cou t -Vo Table 3 Single Vout (Vdc) Note: DC GND Table 2 +Vo Cout Dual Vout (Vdc) Cin (µF) Max. Capacitive Load1 (μF) Cout (µF) Single Vout (Vdc) Max. Capacitive Load (μF) Dual Vout (Vdc) -- -- 3.3 10200 -- -- 100 220 5 4020 5 4800 100 100 12 1035 12 800 100 100 15 705 15 500 -- -- 470 -- -- 1 1. For each output. 24 Note: 1. For each output. 2. Output voltage trimming Leave open if not used. Figure 3 Application Circuit for Trim pin (part in broken line is the interior of models) R1 R2 RT R1 R3 Trim V re f R3 RT aR 2 R2-a -R3 a= Vref R1 Vo’ - Vref down : R T= aR 1 R1-a -R3 a= Vo’ - Vref R2 Vref Trim R2 0V 0V Tr im up up : R T= + Vo +Vo V re f Formula for Trim Resistor Note: Tr im down Table 4 Note: Value for R1, R2, R3, and Vref refer to Table 4 RT: Trim Resistor a: User-defined parameter, no actual meanings Vo': The trim up/down voltage Vout (Vdc) R1 (kΩ) R2 (kΩ) R3 (kΩ) Vref (V) 3.3 4.801 2.863 15 1.24 5 2.883 2.864 10 2.5 12 10.971 2.864 17.8 2.5 15 14.497 2.864 17.8 2.5 24 24.872 2.863 20 2.5 1. Minimum load shouldn't be less than 5%, otherwise ripple may increase dramatically. Operation under minimum load will not damage the converter, however, they may not meet all specifications listed. 2. Maximum capacitive load is tested at input voltage range and full load. 3. All specifications are measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified. cui.com For more information, please visit the product page. CUI Inc │ SERIES: PYB20-T & PYB20-U │ DESCRIPTION: DC-DC CONVERTER date 06/16/2015 │ page 8 of 8 REVISION HISTORY rev. description date 1.0 initial release 06/26/2013 1.01 updated spec 08/16/2013 1.02 updated spec 08/18/2014 updated spec 06/16/2015 1.03 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 20050 SW 112th Ave. Tualatin, OR 97062 800.275.4899 Fax 503.612.2383 cui.com [email protected] 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.