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date
12/14/2022
page
1 of 8
SERIES: PQA50-D Ϳ DESCRIPTION: DC-DC CONVERTER
FEATURES
input
voltage
PQA50-D24-S3-D2,*
W\S
(Vdc)
range
(Vdc)
24
18~36
24
18~36
PQA50-D24-S12-D2,*
24
18~36
PQA50-D24-S15-D2,*
24
18~36
PQA50-D24-S24-D2,*
24
18~36
PQA50-D48-S3-D
48
PQA50-D48-S5-D*
48
PQA50-D48-S24-D*
48
min
(mA)
3.3
output
power
ripple
and noise1
HϒFLHQF\
max
(W)
max
(mVp-p)
W\S
(%)
33
150
91
max
(A)
500
10
5
500
10
50
150
93
12
208
4.167
50
150
93
15
167
3.333
50
150
93
24
104
2.083
50
150
93
36~75
3.3
500
10
33
150
91
36~75
5
500
10
50
150
93
12
208
4.167
50
150
93
48
36~75
36~75
15
167
3.333
50
150
93
48
36~75
24
104
2.083
50
150
93
O
PQA50-D48-S12-D*
PQA50-D48-S15-D*
(Vdc)
output
current
N
PQA50-D24-S5-D *
2,
U
output
voltage
N
MODEL
ED
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 (-40~85°C)
six sided metal shielding
efficiency up to 93%
EN 62368-1
TI
•
•
•
•
•
•
•
•
•
•
•
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0RGHOLVQRW&(FHUWL¿HG
3. * Discontinued model.
D
IS
PART NUMBER KEY
Notes:
PQA50 - DXX - SXX - DX
Base Number
Input Voltage
Output Voltage
*Discontinued heatsink versions.
cui.com
Packaging Style
DIP
Heatsink*
"blank" = no heatsink
H = with heatsink
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CUI Inc Ϳ SERIES: PQA50-D Ϳ DESCRIPTION: DC-DC CONVERTER
date 12/14/2022 Ϳ page 2 of 8
INPUT
parameter
conditions/description
min
W\S
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
ED
start-up voltage
input over voltage protection
24 Vdc input models
48 Vdc input models
input under voltage protection
24 Vdc input models
48 Vdc input models
input over voltage protection
24 Vdc input models
48 Vdc input models
start-up time
nominal input, constant load
U
for maximum of 1 second
24 Vdc input models
48 Vdc input models
surge voltage
36
75
Vdc
Vdc
16
32
Vdc
Vdc
40
81
-0.7
-0.7
N
under/over voltage shutdown
Vdc
Vdc
Vdc
Vdc
50
100
Vdc
Vdc
10
ms
6
mA
models ON (CTRL open or connect TTL high level, 3~12 Vdc)
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CTRL1
¿OWHU
SL¿OWHU
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OUTPUT
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conditions/description
W\S
max
units
full load, input voltage from low to high
±0.2
±0.5
%
load regulation
10% to 100% load
±0.5
±1
%
±1
±3
%
N
parameter
line regulation
adjustability
switching frequency
±10
%
PWM mode
300
kHz
25% load step change
300
500
NjV
transient response deviation
25% load step change
±3
±5
%
WHPSHUDWXUHFRHϒFLHQW
100% load
C
transient recovery time
O
voltage accuracy
min
±0.02
%/°C
PROTECTIONS
conditions/description
min
IS
parameter
over voltage protection2
3.3 Vdc output models
5 Vdc output models
12 Vdc output models
15 Vdc output models
24 Vdc output models
D
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
W\S
2. Module needs to be re-started after over voltage protection.
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CUI Inc Ϳ SERIES: PQA50-D Ϳ DESCRIPTION: DC-DC CONVERTER
date 12/14/2022 Ϳ page 3 of 8
SAFETY AND COMPLIANCE
parameter
conditions/description
isolation voltage
input to output at 1 mA for 1 minute
1,500
min
1,000
W\S
isolation resistance
input to output at 500 Vdc
input to output at 100 kHz, 0.1 Vdc
safety approvals
FHUWL¿HGWR(1%6(1
conducted emissions
&,635(1FODVV%H[WHUQDOFLUFXLWUHTXLUHGVHH¿JXUH
radiated emissions
&,635(1FODVV%H[WHUQDOFLUFXLWUHTXLUHGVHH¿JXUH
ESD
IEC/EN61000-4-2 class B, contact ± 4kV
radiated immunity
IEC/EN61000-4-3 class A, 10V/m
()7EXUVW
,(&(1FODVV%N9H[WHUQDOFLUFXLWUHTXLUHGVHH¿JXUH
surge
,(&(1FODVV%N9H[WHUQDOFLUFXLWUHTXLUHGVHH¿JXUH
conducted immunity
IEC/EN61000-4-6 class A, 3 Vr.m.s
voltage dips & interruptions
IEC/EN61000-4-29 class B, 0%-70%
07%)
DVSHU0,/+'%.)#&
RoHS
2011/65/EU
operating temperature
see derating curve
storage temperature
ED
U
min
non-condensing
case temperature
at full load, operating temperature curve range
W\S
vibration
10~55 Hz, 30 min. along x, y, and z
hours
max
units
-40
85
°C
-55
125
°C
5
N
storage humidity
SOLDERABILITY
S)
1,000,000
N
conditions/description
0
2,000
TI
parameter
units
Vdc
isolation capacitance
ENVIRONMENTAL
max
10
*
max
units
conditions/description
hand soldering
1.5 mm from case for 10 seconds
300
°C
VHHZDYHVROGHULQJSUR¿OH
260
°C
max
units
D
IS
C
O
W\S
%
°C
parameter
wave soldering
min
95
105
MECHANICAL
parameter
conditions/description
min
dimensions
board mount: 50.80 x 25.40 x 11.80
board mount with heatsink: 50.80 x 25.40 x 16.30
case material
aluminum alloy
weight
board mount
board mount with heatsink
W\S
mm
mm
35
43
cui.com
g
g
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CUI Inc Ϳ SERIES: PQA50-D Ϳ DESCRIPTION: DC-DC CONVERTER
date 12/14/2022 Ϳ page 4 of 8
MECHANICAL DRAWING
*1'
3
Ctrl
4
Trim
5
0V
6
+Vo
2
5
3
4
Bottom View
Grid Size:
2.54mm x 2.54mm
4
3
5
2
U
Vin
2
6
1
6
1
PCB Layout
Top View
∅1.00[0.039]
TI
11.80
[0.465]
N
1
∅1.50 [0.059]
25.40[1.000]
)XQFWLRQ
50.80[2.000]
45.72[1.800]
10.16 10.16
[0.400] [0.400]
PIN
10.16
[0.400]
PIN CONNECTIONS
5.08[0.200]
units: mm[inch]
tolerance: ±0.30[±0.012]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
ED
BOARD MOUNT
4.10 [0.161]
BOARD MOUNT WITH HEATSINK
N
Front View
PIN
1
2
)XQFWLRQ
*1'
4
Top View
6
PCB Layout
Top View
D
0V
+Vo
5
1
Trim
6
4
2
Ctrl
5
Grid Size:
2.54mm x 2.54mm
3
Vin
IS
3
∅1.50 [0.059]
C
PIN CONNECTIONS
O
units: mm[inch]
tolerance: ±0.30[±0.012]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
Front View
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CUI Inc Ϳ SERIES: PQA50-D Ϳ DESCRIPTION: DC-DC CONVERTER
date 12/14/2022 Ϳ page 5 of 8
N
U
ED
DERATING CURVES
EMC RECOMMENDED CIRCUIT
Figure 1
Table 1
24
48
C0
Nj)9
Nj)9
CY1, CY2
Q)N9
Q)N9
LCM
2.2mH
2.2mH
Note:
1. See Table 3 for Cout values.
O
N
TI
Recommended external circuit components
Vin (Vdc)
TEST CONFIGURATION
Table 2
C
Figure 2
D
IS
External components
1RWH
Lin
Nj+
Cin
Nj)(65
at 100 kHz
,QSXWUHÀHFWHGULSSOHFXUUHQWLVPHDVXUHGZLWKDQLQGXFWRU/LQDQG&DSDFLWRU&LQWRVLPXODWHVRXUFHLPSHGDQFH
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CUI Inc Ϳ SERIES: PQA50-D Ϳ DESCRIPTION: DC-DC CONVERTER
date 12/14/2022 Ϳ page 6 of 8
APPLICATION NOTES
Requirement on output load
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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
WHVWHGXQGHUORDGVHH)LJXUH,I\RXZDQWWRIXUWKHUGHFUHDVHWKHLQSXWRXWSXWULSSOH\RXFDQLQFUHDVHFDSDFLWDQFHSURSHUO\RU
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
U
ED
1.
Table 4
Cin
)
Cout
)
3.3
100
220
5
100
220
12
100
100
15
100
100
24
100
47
Vout
(Vdc)
Max.
Capacitive Load
Nj)
3.3
27000
5
18900
12
3700
15
2000
24
1000
D
IS
C
O
N
TI
Vout
(Vdc)
N
Table 3
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date 12/14/2022 Ϳ page 7 of 8
APPLICATION NOTES (CONTINUED)
Output Voltage Trimming
Leave open if not used.
Figure 4
N
TI
N
U
ED
1.
Table 5
RTOP
RBOTTOM
RO
V5()
(Vdc)
N
N
N
(V)
3.3
4.788
2.87
15
1.24
5
2.87
2.87
12.1
2.5
12
11
2.87
22
2.5
15
15
3
22
2.5
24
20
2.308
15
2.5
IS
C
O
VOUT
Value for RTOP, RBOTTOM, RO, and V5()UHIHUWR7DEOH¿[HGLQWHUQDOYDOXHV
RTRIM: Trim resistance
D8VHUGH¿QHGSDUDPHWHUQRDFWXDOPHDQLQJV
VOUT: Nominal output voltage
D
Note:
Notes:
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
QRWPHHWDOOVSHFL¿FDWLRQVOLVWHG
2. Maximum capacitive load is tested at input voltage range and full load.
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CUI Inc Ϳ SERIES: PQA50-D Ϳ DESCRIPTION: DC-DC CONVERTER
date 12/14/2022 Ϳ page 8 of 8
REVISION HISTORY
rev.
description
date
initial release
07/01/2013
added heat sink option, updated spec
10/29/2013
1.02
updated datasheet
1.03
discontinued heat sink versions
ED
1.0
1.01
07/14/2015
02/07/2019
1.04
company logo updated
1.05
GHUDWLQJFXUYHVDQGFLUFXLW¿JXUHVXSGDWHG
03/30/2021
1.06
&(FHUWL¿FDWLRQUHPRYHGIRU9PRGHOV
1.07
discontinued models PQA50-D24-S12-D, PQA50-D24-S15-D,
PQA50-D24-S24-D, PQA50-D24-S5-D, PQA50-D48-S12-D,
PQA50-D48-S15-D, PQA50-D48-S24-D & PQA50-D48-S5-D
11/11/2022
1.08
discontinued model PQA50-D24-S3-D
12/14/2022
01/05/2022
U
11/10/2022
D
IS
C
O
N
TI
N
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
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cui.com
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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
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