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07/15/2015
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
typ
(Vdc)
input
voltage
range
(Vdc)
output
voltage
(Vdc)
min
(mA)
output
current
max
(A)
output
power
max
(W)
ripple
and noise
1
max
(mVp-p)
efficiency
typ
(%)
PQA50-D24-S3-T
PQA50-D24-S5-T
PQA50-D24-S12-T
PQA50-D24-S15-T
PQA50-D24-S24-T
PQA50-D48-S3-T
PQA50-D48-S5-T
PQA50-D48-S12-T
PQA50-D48-S15-T
PQA50-D48-S24-T
Notes:
24
24
24
24
24
48
48
48
48
48
18~36
18~36
18~36
18~36
18~36
36~75
36~75
36~75
36~75
36~75
3.3
5
12
15
24
3.3
5
12
15
24
500
500
208
167
104
500
500
208
167
104
10
10
4.167
3.333
2.083
10
10
4.167
3.333
2.083
33
50
50
50
50
33
50
50
50
50
150
150
150
150
150
150
150
150
150
150
89
91
91
91
91
89
91
91
91
91
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
Mounting Type
T = Chassis Mount
Heatsink
"blank" = no heatsink
H = with heatsink
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SERIES:
PQA50-T
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DESCRIPTION:
DC-DC CONVERTER
date
07/15/2015
│
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INPUT
parameter
operating input voltage
conditions/description
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
input under voltage protection
24 Vdc input models
48 Vdc input models
input over voltage protection
24 Vdc input models
48 Vdc input models
for maximum of 1 second
24 Vdc input models
48 Vdc input models
nominal input, constant load
models ON (CTRL open or connect TTL high level, 3~12 Vdc)
CTRL
1
filter
models OFF (CTRL connect GND or low level, 0~1.2 Vdc)
input current (models OFF)
pi filter
Note 1. CTRL pin voltage is referenced to GND.
min
18
36
18
36
typ
24
48
max
36
75
units
Vdc
Vdc
Vdc
Vdc
start-up voltage
36
75
16
32
40
81
-0.7
-0.7
10
50
100
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
ms
under/over voltage shutdown
surge voltage
start-up time
6
mA
OUTPUT
parameter
line regulation
load regulation
voltage accuracy
adjustability
switching frequency
transient recovery time
transient response deviation
temperature coefficient
PWM mode
25% load step change
25% load step change
100% load
conditions/description
full load, input voltage from low to high
10% to 100% load
min
typ
±0.2
±0.5
±1
±10
320
300
±3
±0.02
500
±5
max
±0.5
±1
±3
units
%
%
%
%
kHz
μs
%
%/°C
PROTECTIONS
parameter
conditions/description
3.3 Vdc output models
5 Vdc output models
12 Vdc output models
15 Vdc output models
24 Vdc output models
continuous, automatic recovery, hiccup
110
°C
min
typ
3.9
6.2
15
18
30
135
max
units
Vdc
Vdc
Vdc
Vdc
Vdc
%
over voltage protection
2
over current protection
short circuit protection
over temperature protection
Note
2. Module needs to be re-started after over voltage protection.
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DESCRIPTION:
DC-DC CONVERTER
date
07/15/2015
│
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SAFETY AND COMPLIANCE
parameter
isolation voltage
isolation resistance
isolation capacitance
conducted emissions
radiated emissions
ESD
radiated immunity
EFT/burst
surge
conducted immunity
voltage dips & interruptions
MTBF
RoHS
conditions/description
input to output at 1 mA for 1 minute
input to output at 500 Vdc
input to output at 100 kHz, 0.1 Vdc
CISPR22/EN55022 class B (external circuit required, see figure 1)
CISPR22/EN55022 class B (external circuit required, see figure 1)
IEC/EN61000-4-2 class B, contact ± 4kV
IEC/EN61000-4-3 class A, 10V/m
IEC/EN61000-4-4 class B, ± 2kV (external circuit required, see figure 1)
IEC/EN61000-4-5 class B, ± 2kV (external circuit required, see figure 1)
IEC/EN61000-4-6 class A, 3 Vr.m.s
IEC/EN61000-4-29 class B, 0%-70%
as per MIL-HDBK-217F @ 25°C
2011/65/EU
1,000,000
hours
min
1,500
1,000
2,000
typ
max
units
Vdc
MΩ
pF
ENVIRONMENTAL
parameter
operating temperature
storage temperature
storage humidity
case temperature
vibration
non-condensing
at full load, operating temperature curve range
10~55 Hz, 30 min. along x, y, and z
conditions/description
see derating curve
min
-40
-55
5
typ
max
85
125
95
105
10
units
°C
°C
%
°C
G
MECHANICAL
parameter
dimensions
case material
weight
conditions/description
chassis mount: 76.0 x 31.5 x 21.2
chassis mount with heatsink: 76.0 x 31.5 x 25.1
aluminum alloy
chassis mount
chassis mount with heatsink
57
65
g
g
min
typ
max
units
mm
mm
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SERIES:
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DESCRIPTION:
DC-DC CONVERTER
date
07/15/2015
│
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4 of 7
MECHANICAL DRAWING
CHASSIS MOUNT
units: mm[inch]
tolerance: ±0.50[±0.020]
wire range: 24~12 AWG
PIN CONNECTIONS
PIN
1
2
3
4
5
6
Function
CTRL
GND
Vin
Trim
0V
+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
1
2
3
4
5
6
Function
CTRL
GND
Vin
Trim
0V
+Vo
Top View
Front View
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SERIES:
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DESCRIPTION:
DC-DC CONVERTER
date
07/15/2015
│
page
5 of 7
DERATING CURVES
Output Voltage ≤ 5Vdc
With heatsink
Output Voltage > 5Vdc
With heatsink
100
80
60
40
20
Without heatsink
100
80
60
40
20
-20
0
20
40
55 65
85
100
Without heatsink
Load (%)
Safe operating area
Load (%)
Safe operating area
-40
Ambient Temperature (°C)
-40
-20
0
20
40
60 70
85
100
Ambient Temperature (°C)
EMC RECOMMENDED CIRCUIT
Figure 1
Table 1
Recommended external circuit components
LCM
Vin
CY 1
Vin
C0
GND
CY 2
+Vo
Cout
LOAD
Vin (Vdc)
C0
CY1, CY2
LCM
24
330μF/50V
1nF/2kV
2.2mH
48
330μF/100V
1nF/2kV
2.2mH
DC/D C
GND
0V
Note:
1. See Table 3 for Cout values.
TEST CONFIGURATION
Figure 2
Table 2
Oscilloscope
Lin
Cin
Current
Probe
External components
Lin
4.7μH
220μF, ESR < 1.0Ω
at 100 kHz
DC DC
Load
Cin
Note:
Lin(4.7µH)
1. Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance.
Cin(220µF, ESR < 1.0Ω at 100 KHz)
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