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datdatee 02/07/2019
pagepage 1 of 71 of 7
SERIES: PQA50-D 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
remote on/off
operating temperature range (-40~85C)
six sided metal shielding
efficiency up to 93%
input output output output ripple efficiency
MODEL
1
voltage voltage current power and noise
typ range min max max max typ
(Vdc) (Vdc) (Vdc) (mA) (A) (W) (mVp-p) (%)
PQA50-D24-S3-D 24 18~36 3.3 500 10 33 150 91
PQA50-D24-S5-D 24 18~36 5 500 10 50 150 93
PQA50-D24-S12-D 24 18~36 12 208 4.167 50 150 93
PQA50-D24-S15-D 24 18~36 15 167 3.333 50 150 93
PQA50-D24-S24-D 24 18~36 24 104 2.083 50 150 93
PQA50-D48-S3-D 48 36~75 3.3 500 10 33 150 91
PQA50-D48-S5-D 48 36~75 5 500 10 50 150 93
PQA50-D48-S12-D 48 36~75 12 208 4.167 50 150 93
PQA50-D48-S15-D 48 36~75 15 167 3.333 50 150 93
PQA50-D48-S24-D 48 36~75 24 104 2.083 50 150 93
Notes: 1. Ripple and noise are measured at 20 MHz BW byparallel cabl method with 1 F ceramic and 10 F electrolytic capacitors on the output.
PART NUMBER KEY
PQA50 - DXX - SXX - DX
Base Number
Heatsink*blan = no heatsink
Input Voltage
Packaging Style
H = with heatsink
DIP
Output Voltage
Notes: *Discontinued heatsink versions.
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CUI Inc SERIES: PQA50-D DESCRIPTION: DC-DC CONVERTER date 02/07/2019 page 2 of 7
INPUT
parameter conditions/description min typ max units
24 Vdc input models 18 24 36 Vdc
operating input voltage
48 Vdc input models 36 48 75 Vdc
input under voltage protection
24 Vdc input models 18 Vdc
48 Vdc input models 36 Vdc
start-up voltage
input over voltage protection
24 Vdc input models 36 Vdc
48 Vdc input models 75 Vdc
input under voltage protection
24 Vdc input models 16 Vdc
48 Vdc input models 32 Vdc
under/over voltage shutdown
input over voltage protection
24 Vdc input models 40 Vdc
48 Vdc input models 81 Vdc
for maximum of 1 second
surge voltage 24 Vdc input models -0.7 50 Vdc
48 Vdc input models -0.7 100 Vdc
start-up time nominal input, constant load 10 ms
models ON (CTRL open or connect TTL high level, 3~12 Vdc)
1
CTRL models OFF (CTRL connect GND or low level, 0~1.2 Vdc)
input current (models OFF) 6 mA
filter pi filter
Note 1. CTRL pin voltage is referenced to GND.
OUTPUT
parameter conditions/description min typ max units
line regulation full load, input voltage from low to high 0.2 0.5 %
load regulation 10% to 100% load 0.5 1 %
voltage accuracy 1 3 %
adjustability 10 %
switching frequency PWM mode 300 kHz
transient recovery time 25% load step change 300 500 s
transient response deviation 25% load step change 3 5 %
temperature coefficient 100% load 0.02 %/C
PROTECTIONS
parameter conditions/description min typ max units
3.3 Vdc output models 3.9 Vdc
5 Vdc output models 6.2 Vdc
2
over voltage protection 12 Vdc output models 15 Vdc
15 Vdc output models 18 Vdc
24 Vdc output models 30 Vdc
over current protection 135 %
short circuit protection continuous, automatic recovery, hiccup
over temperature protection 110 C
Note 2. Module needs to be re-started after over voltage protection.
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