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date 07/08/2014
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SERIES: PQA30-D │ DESCRIPTION: DC-DC CONVERTER
date
page 1 of 7
FEATURES
• up to 30 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, and over voltage protections
• remote on/off
• operating temperature range (-40~85°C)
• six sided metal shielding
• efficiency up to 89%
MODEL input
voltage
output
voltage
output
current
output
power
ripple
and noise1
efciency
typ
(Vdc)
range
(Vdc) (Vdc)
min
(A)
max
(A)
max
(W)
max
(mVp-p)
typ
(%)
PQA30-D24-S3-D 24 18~36 3.3 0.60 6 20 120 87
PQA30-D24-S5-D 24 18~36 5 0.60 6 30 120 88
PQA30-D24-S9-D 24 18~36 9 0.333 3.333 30 120 88
PQA30-D24-S12-D 24 18~36 12 0.25 2.5 30 120 88
PQA30-D24-S15-D 24 18~36 15 0.20 2 30 120 89
PQA30-D24-S24-D 24 18~36 24 0.125 1.25 30 120 89
PQA30-D48-S3-D 48 36~75 3.3 0.60 6 20 120 87
PQA30-D48-S5-D 48 36~75 5 0.60 6 30 120 88
PQA30-D48-S12-D 48 36~75 12 0.25 2.5 30 120 89
PQA30-D48-S15-D 48 36~75 15 0.20 2 30 120 89
PQA30-D48-S24-D 48 36~75 24 0.125 1.25 30 120 88
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
PQA30 - DXX - SXX - DX
Input Voltage
Output Voltage
Packaging Style
Base Number
DIP
Heatsink
"blank" = no heatsink
H = with heatsink
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CUI Inc │ SERIES: PQA30-D │ DESCRIPTION: DC-DC CONVERTER date 07/08/2014 │ 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
start-up voltage 24 Vdc input models
48 Vdc input models
17.8
35.8
18
36
Vdc
Vdc
under voltage shutdown 24 Vdc input models
48 Vdc input models
16
32
Vdc
Vdc
surge voltage
for maximum of 1 second
24 Vdc input models
48 Vdc input models
-0.7
-0.7
50
100
Vdc
Vdc
start-up time nominal input, constant load 10 ms
CTRL1
models ON (CTRL open or connect TTL high level, 2.5~12 Vdc)
models OFF (CTRL connect GND or low level, 0~1.2 Vdc)
input current (models OFF) 1 mA
lter pi lter
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 μs
transient response deviation 25% load step change ±3 ±5 %
temperature coefcient 100% load ±0.02 %/°C
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection hiccup, automatic recovery
over current protection 120 130 150 %
over voltage protection
3.3 Vdc output models
5 Vdc output models
9 Vdc output models
12 Vdc output models
15 Vdc output models
24 Vdc output models
3.96
6
10.8
15
18
28
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
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CUI Inc │ SERIES: PQA30-D │ DESCRIPTION: DC-DC CONVERTER date 07/08/2014 │ page 3 of 7
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
isolation voltage input to output for 1 minute at 1 mA max. 1,500 Vdc
isolation resistance input to output at 500 Vdc 1,000 MΩ
EMI/EMC CE1
conducted emissions CISPR22/EN55022 class A (no circuit required); class B (external circuit required, see Figure 1-b)
radiated emissions CISPR22/EN55022 class A (no circuit required); 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 1,000,000 hours
RoHS 2011/65/EU
Note 1. CE mark is only on models without heatsink.
ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature see derating curves -40 85 °C
storage temperature -55 125 °C
storage humidity non-condensing 5 95 %
case temperature at full load, operating temperature curve range 105 °C
vibration 10~55Hz, 30 min. along x, y, and z axis 10 G
SOLDERABILITY
parameter conditions/description min typ max units
hand soldering 1.5 mm from case for 10 seconds 300 °C
wave soldering see wave soldering prole 260 °C
MECHANICAL
parameter conditions/description min typ max units
dimensions board mount: 50.80 x 25.40 x 11.80
board mount with heatsink: 50.80 x 25.40 x 16.30
mm
mm
case material aluminum alloy
weight board mount
board mount with heatsink
22
35
g
g
10 Sec. Max.
Wave Soldering Time
4 Sec. Max.
Peak Temp. 260°C Max.
Time (sec.)
Temperature (°C)
250
200
150
100
50
0
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CUI Inc │ SERIES: PQA30-D │ DESCRIPTION: DC-DC CONVERTER date 07/08/2014 │ page 4 of 7
MECHANICAL DRAWING
units: mm[inch]
tolerance: ±0.30[±0.012]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
units: mm[inch]
tolerance: ±0.30[±0.012]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
∅1.50 [0.059]
4.10 [0.161]
∅1.00[0.039]
11.80
[0.465]
50.80[2.000]
45.72[1.800]
1
2
3
6
5
4
5.08[0.200]
10.16
[0.400]
10.16
[0.400]
25.40[1.000]
6
5
4
1
2
3
Top View
PCB Layout
Front View
Bottom View
Grid Size:
2.54mm x 2.54mm
10.16
[0.400]
2.54
[0.100]
∅1.50 [0.059]
6
5
4
1
2
3
Top View
PCB Layout
Grid Size:
2.54mm x 2.54mm
Top View
Front View
PIN CONNECTIONS
PIN Function
1 Vin
2 GND
3 Ctrl
4 Trim
5 0V
6+Vo
PIN CONNECTIONS
PIN Function
1 Vin
2 GND
3 Ctrl
4 Trim
5 0V
6+Vo
BOARD MOUNT
BOARD MOUNT WITH HEATSINK
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CUI Inc │ SERIES: PQA30-D │ DESCRIPTION: DC-DC CONVERTER date 07/08/2014 │ page 5 of 7
Output Voltage ≤ 5V
Recommended external circuit components
Vin (Vdc) 24 48
FUSE choose according to input current
MOV S14K35 S14K60
LDM1 56µH 56µH
TVS SMCJ48A SMCJ90A
C0 330µF/50V 330µF/100V
C1, C2 4.7µF/50V 2.2µF/100V
LCM1 1mH 1mH
CY1, CY2 1nF/2kV 1nF/2kV
EMC RECOMMENDED CIRCUIT
DERATING CURVES
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 0204085 100
Safe operating area
6050
Without heatsink
With heatsink
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 02040100
Safe operating area
55 65 85
Without heatsink
With heatsink
Output Voltage > 5V
Figure 1
Table 1
VIN
GND
+Vo
0V
EUT
LOAD
C2
LCM1
C0
TVS
LDM1
MOV
FUSE
C1
Vin
GN
D
CY1
CY2
(a) (b)
TEST CONFIGURATION
DC
Cin
Lin
DC
Load
Oscilloscope
Current
Probe
Lin(4.7µH) Cin(220µF, ESR<1.0Ωat 100KHz)
Note: 1. Input reected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance.
External components
Lin 4.7μH
Cin 220μF, ESR < 1.0Ω
at 100 kHz
Figure 2 Table 2
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CUI Inc │ SERIES: PQA30-D │ DESCRIPTION: DC-DC CONVERTER date 07/08/2014 │ page 6 of 7
1. Requirement on output load
To ensure this module can operate efciently and reliably, the minimum output load cannot be less than 10% 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).
3. Output Voltage Trimming
Leave open if not used.
Formula for Trim Resistor
Application Circuit for Trim Pin
(part in broken line is the interior of models)
Note: Value for R1, R2, R3, and Vref (see Table 5)
RT: Trim Resistor
a: User-dened parameter, no actual meanings
Vo': The trim up/down voltage
up:a= Vre
f
Vo’-Vref R
1
R= a
2
R-a
2
-R
3
down:a= Vre
f
Vo’-Vref R
2
R=
T
T
aR
1
R-a
1
-R
3
APPLICATION NOTES
Figure 3
Table 3 Table 4
Table 5
Figure 4
Vout
(Vdc)
Cin
(µF)
Cout
(µF)
3.3 100 220
5 100 220
9 100 100
12 100 100
15 100 100
24 100 47
Notes: 1. Minimum load shouldn't be less than 10%, otherwise ripple may increase dramatically. Operation under minimum load will not damage the converter, however, they may
not meet all specications listed.
2. Maximum capacitive load is tested at input voltage range and full load.
3. All specications are measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specied.
+Vo
0V
R
2
R
1
R
3
V
re f
R
T
Trim
0V
R
2
R
1
R
3
V
ref
R
T
Tr
im
+Vo
Tr im up Tr im down
Vin
GND
+V
o
0V
DC
Cin
DC
Cout
Vout
(Vdc)
Max.
Capacitive Load (μF)
3.3 6800
5 6800
9 680
12 680
15 680
24 470
Vout
(Vdc)
R1
(kΩ)
R2
(kΩ)
R3
(kΩ)
Vref
(V)
3.3 4.801 2.863 12 1.24
5 2.883 2.864 10 2.5
9 7.5 2.864 15 2.5
12 10.971 2.864 15 2.5
15 14.497 2.864 15 2.5
24 24.872 2.863 20 2.5
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CUI Inc │ SERIES: PQA30-D │ DESCRIPTION: DC-DC CONVERTER date 07/08/2014 │ page 7 of 7
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.
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
techsupport@cui.com
rev. description date
1.0 initial release 07/08/2014
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
CUI Inc.:
PQA30-D24-S9-D PQA30-D24-S5-D PQA30-D48-S12-D PQA30-D24-S12-D PQA30-D48-S5-D PQA30-D48-S24-D
PQA30-D24-S15-D PQA30-D24-S24-D PQA30-D48-S15-D PQA30-D24-S3-D PQA30-D48-S3-D PQA30-D24-S3-
DH PQA30-D24-S15-DH PQA30-D24-S12-DH PQA30-D24-S24-DH PQA30-D48-S15-DH PQA30-D48-S5-DH
PQA30-D48-S24-DH PQA30-D48-S12-DH PQA30-D24-S5-DH PQA30-D48-S3-DH PQA30-D24-S9-DH