For more information, please visit the product page. date 07/15/2015 page 1 of 7 SERIES: PQA50-T │ DESCRIPTION: DC-DC CONVERTER FEATURES • • • • • • • • • • • up to 50 W isolated output 2:1 input range (18~36 Vdc, 36~75 Vdc) smaller package single, regulated output 1,500 Vdc isolation short circuit, over current, input under voltage protection inverse polarity protection remote on/off operating temperature range (-40~85°C) six sided metal shielding efficiency up to 91% MODEL input voltage output voltage output current output power ripple and noise1 efficiency typ (Vdc) range (Vdc) (Vdc) min (mA) max (A) max (W) max (mVp-p) typ (%) PQA50-D24-S3-T 24 18~36 3.3 500 10 33 150 89 PQA50-D24-S5-T 24 18~36 5 500 10 50 150 91 PQA50-D24-S12-T 24 18~36 12 208 4.167 50 150 91 PQA50-D24-S15-T 24 18~36 15 167 3.333 50 150 91 PQA50-D24-S24-T 24 18~36 24 104 2.083 50 150 91 PQA50-D48-S3-T 48 36~75 3.3 500 10 33 150 89 PQA50-D48-S5-T 48 36~75 5 500 10 50 150 91 PQA50-D48-S12-T 48 36~75 12 208 4.167 50 150 91 PQA50-D48-S15-T 48 36~75 15 167 3.333 50 150 91 PQA50-D48-S24-T 48 36~75 24 104 2.083 50 150 91 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. PART NUMBER KEY PQA50 - DXX - SXX - TX Base Number Input Voltage Output Voltage cui.com Mounting Type T = Chassis Mount Heatsink "blank" = no heatsink H = with heatsink For more information, please visit the product page. CUI Inc │ SERIES: PQA50-T │ DESCRIPTION: DC-DC CONVERTER date 07/15/2015 │ page 2 of 7 INPUT parameter conditions/description min typ max units operating input voltage 24 Vdc input models 48 Vdc input models 18 36 24 48 36 75 Vdc Vdc input under voltage protection 24 Vdc input models 48 Vdc input models 18 36 start-up voltage under/over voltage shutdown Vdc Vdc input over voltage protection 24 Vdc input models 48 Vdc input models 36 75 Vdc Vdc input under voltage protection 24 Vdc input models 48 Vdc input models 16 32 Vdc Vdc input over voltage protection 24 Vdc input models 48 Vdc input models surge voltage for maximum of 1 second 24 Vdc input models 48 Vdc input models start-up time nominal input, constant load 40 81 Vdc Vdc -0.7 -0.7 50 100 Vdc Vdc 10 ms 6 mA models ON (CTRL open or connect TTL high level, 3~12 Vdc) CTRL1 models OFF (CTRL connect GND or low level, 0~1.2 Vdc) input current (models OFF) filter pi filter Note 1. 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 10% to 100% load ±0.5 ±1 % ±1 ±3 % voltage accuracy adjustability ±10 % switching frequency PWM mode 320 kHz 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 PROTECTIONS parameter conditions/description over voltage protection2 3.3 Vdc output models 5 Vdc output models 12 Vdc output models 15 Vdc output models 24 Vdc output models min over current protection short circuit protection max units 3.9 6.2 15 18 30 Vdc Vdc Vdc Vdc Vdc 135 % 110 °C continuous, automatic recovery, hiccup over temperature protection Note typ 2. Module needs to be re-started after over voltage protection. cui.com For more information, please visit the product page. CUI Inc │ SERIES: PQA50-T │ DESCRIPTION: DC-DC CONVERTER date 07/15/2015 │ page 3 of 7 SAFETY AND COMPLIANCE parameter conditions/description isolation voltage input to output at 1 mA for 1 minute 1,500 min typ isolation resistance input to output at 500 Vdc 1,000 isolation capacitance input to output at 100 kHz, 0.1 Vdc conducted emissions CISPR22/EN55022 class B (external circuit required, see figure 1) radiated emissions CISPR22/EN55022 class B (external circuit required, see figure 1) 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) surge IEC/EN61000-4-5 class B, ± 2kV (external circuit required, see figure 1) 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 units Vdc MΩ 2,000 pF 1,000,000 hours ENVIRONMENTAL parameter conditions/description min max units operating temperature see derating curve -40 85 °C -55 125 °C 5 95 % 105 °C 10 G max units storage temperature storage humidity non-condensing case temperature at full load, operating temperature curve range vibration 10~55 Hz, 30 min. along x, y, and z typ MECHANICAL parameter conditions/description dimensions chassis mount: 76.0 x 31.5 x 21.2 chassis mount with heatsink: 76.0 x 31.5 x 25.1 min case material aluminum alloy weight chassis mount chassis mount with heatsink typ mm mm 57 65 cui.com g g For more information, please visit the product page. CUI Inc │ SERIES: PQA50-T │ DESCRIPTION: DC-DC CONVERTER date 07/15/2015 │ page 4 of 7 MECHANICAL DRAWING CHASSIS MOUNT units: mm[inch] tolerance: ±0.50[±0.020] wire range: 24~12 AWG PIN CONNECTIONS PIN Function 1 CTRL 2 GND 3 Vin 4 Trim 5 0V 6 +Vo Top View Front View CHASSIS MOUNT WITH HEATSINK units: mm[inch] tolerance: ±0.50[±0.020] wire range: 24~12 AWG PIN CONNECTIONS PIN Function 1 CTRL 2 GND 3 Vin 4 Trim 5 0V 6 +Vo Top View Front View cui.com For more information, please visit the product page. CUI Inc │ SERIES: PQA50-T │ DESCRIPTION: DC-DC CONVERTER date 07/15/2015 │ page 5 of 7 DERATING CURVES Output Voltage ≤ 5Vdc Output Voltage > 5Vdc With heatsink With heatsink 100 100 Load (%) 80 60 Load (%) Without heatsink Safe operating area 40 20 Without heatsink 80 60 Safe operating area 40 20 -40 -20 0 20 40 55 65 85 100 -40 Ambient Temperature (°C) -20 0 20 40 60 70 85 100 Ambient Temperature (°C) EMC RECOMMENDED CIRCUIT Figure 1 Table 1 Recommended external circuit components LCM CY 1 Vin Vin +Vo Cout DC/D C C0 GND GND LOAD 0V Vin (Vdc) 24 48 C0 330μF/50V 330μF/100V CY1, CY2 1nF/2kV 1nF/2kV LCM 2.2mH 2.2mH Note: CY 2 1. See Table 3 for Cout values. TEST CONFIGURATION Figure 2 Table 2 Oscilloscope External components Lin Cin Lin(4.7µH) Note: Current Probe DC DC Load Cin(220µF, ESR < 1.0Ω at 100 KHz) Lin 4.7μH Cin 220μF, ESR < 1.0Ω at 100 kHz 1. Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance. cui.com For more information, please visit the product page. CUI Inc │ SERIES: PQA50-T │ DESCRIPTION: DC-DC CONVERTER date 07/15/2015 │ page 6 of 7 APPLICATION NOTES 1. Requirement on output load To ensure this module can operate efficiently and reliably, the minimum output load cannot be less than 5% of the full load during operation. If the actual output power is small, please connect a resistor at the output end in parallel to increase the load. 2. 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 3). If you want to further decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low ESR (see table 3). However, the capacitance must not exceed the maximum capacitive load or a start-up problem might arise (see table 4). Figure 3 Vin +Vout DC Cin DC 0V GND Table 3 Table 4 Vout (Vdc) Cin (µF) Cout (µF) 3.3 100 220 5 100 220 12 100 100 15 100 100 24 100 47 Vout (Vdc) Max. Capacitive Load (μF) 3.3 27000 5 18900 12 3700 15 2000 24 1000 3. Output Voltage Trimming Leave open if not used. Figure 4 Formula for Trim Resistor Application Circuit for Trim Pin aR2 Vref (part in broken line is the interior of models) -R3 up: RT = a= R1 R 2-a Vo’-Vref + Vo +Vo down: R T = R1 V re f R3 RT R1 Trim V re f R3 Trim R2 RT R2 0V 0V Tr im up Tr im down a= Vo’-Vref R2 Vref Note: Value for R1, R2, R3, and Vref (see Table 5) RT: Trim Resistor a: User-defined parameter, no actual meanings Vo': The trim up/down voltage Table 5 Notes: aR1 -R3 R 1-a Vout (Vdc) R1 (kΩ) R2 (kΩ) R3 (kΩ) Vref (V) 3.3 4.788 5 2.87 2.87 15 1.24 2.87 12.1 2.5 12 11 2.87 22 2.5 15 24 15 3 22 2.5 20 2.308 15 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: PQA50-T │ DESCRIPTION: DC-DC CONVERTER date 07/15/2015 │ page 7 of 7 REVISION HISTORY rev. description date 1.0 initial release 01/21/2014 1.01 updated datasheet 07/15/2015 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.