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date 10/29/2013
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SERIES: PQD6-D │ DESCRIPTION: DC-DC CONVERTER
date
page 1 of 6
FEATURES
• up to 6 W isolated output
• smaller package
• 4:1 input range (9~36 V, 18~75 V)
• single/dual regulated output
• 1,500 Vdc isolation
• continuous short circuit, over current protection
• six-sided shielded case
• temperature range (-40~85°C)
• high efficiency at light load
• efficiency up to 88%
MODEL input
voltage
output
voltage
output
current
output
power
ripple
and noise1
effi ciency
typ
(Vdc)
range
(Vdc) (Vdc)
min
(mA)
max
(mA)
max
(W)
max
(mVp-p)
typ
(%)
PQD6-Q24-S3-D 24 9~36 3.3 75 1500 5 75 79
PQD6-Q24-S5-D 24 9~36 5 60 1200 6 75 83
PQD6-Q24-S12-D 24 9~36 12 25 500 6 75 87
PQD6-Q24-S15-D 24 9~36 15 20 400 6 75 88
PQD6-Q24-S24-D 24 9~36 24 12 250 6 75 88
PQD6-Q24-D5-D 24 9~36 ±5 ±30 ±600 6 75 83
PQD6-Q24-D12-D 24 9~36 ±12 ±12 ±250 6 75 87
PQD6-Q24-D15-D 24 9~36 ±15 ±10 ±200 6 75 88
PQD6-Q48-S3-D 48 18~75 3.3 75 1500 5 75 79
PQD6-Q48-S5-D 48 18~75 5 60 1200 6 75 83
PQD6-Q48-S12-D 48 18~75 12 25 500 6 75 87
PQD6-Q48-S15-D 48 18~75 15 20 400 6 75 88
PQD6-Q48-S24-D 48 18~75 24 12 250 6 75 88
PQD6-Q48-D5-D 48 18~75 ±5 ±30 ±600 6 75 83
PQD6-Q48-D12-D 48 18~75 ±12 ±12 ±250 6 75 87
PQD6-Q48-D15-D 48 18~75 ±15 ±10 ±200 6 75 88
Notes: 1. ripple and noise are measured at 20 MHz BW by “parallel cable” method
PART NUMBER KEY
PQD6 - QXX - XXX -D
Input Voltage Output Voltage Packaging Style
Base Number
S = single
D = dual
DIP
Output
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CUI Inc │ SERIES: PQD6-D │ DESCRIPTION: DC-DC CONVERTER date 10/29/2013 │ page 2 of 6
INPUT
parameter conditions/description min typ max units
operating input voltage 24 V input models
48 V input models
9
18
24
48
36
75
Vdc
Vdc
start-up voltage 24 V input models
48 V input models
9
18
Vdc
Vdc
surge voltage
for maximum of 1 second
24 V input models
48 V input models
-0.7
-0.7
50
100
Vdc
Vdc
fi lter pi fi lter
no-load power consumption 0.15 0.3 W
OUTPUT
parameter conditions/description min typ max units
line regulation full load, input voltage from low to high ±0.2 ±0.5 %
load regulation 5% to 100% load ±0.5 ±1 %
cross regulation
dual output
main output 50% load, secondary output 10%-
100% load
±5 %
voltage accuracy ±1 ±2 %
voltage balance1dual output, balanced loads ±0.5 ±1.5 %
switching frequency 300 KHz
transient recovery time 25% load step change 300 500 μs
transient response deviation 25% load step change ±3 ±5 %
temperature coeffi cient 100% load ±0.03 %/°C
Note: 1. For dual output models, unbalanced load can not exceed ±5%. If ±5% is exceeded, it may not meet all specifi cations.
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection continuous, automatic recovery
over current protection 120 180 %lo
over voltage protection 110 140 %Vo
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
isolation voltage for 1 minute at 1 mA max. 1,500 Vdc
isolation resistance at 500 Vdc 1,000 MΩ
isolation capacitance input to output, 100 KHz/0.1 V 1,000 pF
safety approvals CE
conducted emissions CISPR22/EN55022, class A, class B (external circuit required, see Figure 1-b)
radiated emissions CISPR22/EN55022, class A, 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 compliant 2011/65/EU
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CUI Inc │ SERIES: PQD6-D │ DESCRIPTION: DC-DC CONVERTER date 10/29/2013 │ page 3 of 6
5.08 [0.200]
11.70 [0.461]
∅1.00 [0.039]
4.10[0
.1
61]
25.40 [1.000]
25.40[1.000]
20.32 [0.80
0]
20.32 [0.800]
34 5
21
∅
1.50 [0.059]
3
5
21
4
Top View
PCB Layout
Front View
Bottom View
Grid Size:
2.54mm x 2.54mm
PIN CONNECTIONS
PIN Single Output Dual Output
1 GND GND
2 Vin Vin
3 +Vo +Vo
4 NO PIN 0V
50V -Vo
units: mm[inch]
tolerance: ±0.25[±0.010]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature see derating curve -40 85 °C
storage temperature -55 125 °C
storage humidity non-condensing 5 95 %
case temperature at full load, Ta=71°C 105 °C
vibration 10~55 Hz for 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 profi le 260 °C
MECHANICAL
parameter conditions/description min typ max units
dimensions 25.40 x 25.40 x 11.70 (1.00 x 1.00 x 0.461 inch) mm
case material aluminum alloy
weight 14 g
MECHANICAL DRAWING
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CUI Inc │ SERIES: PQD6-D │ DESCRIPTION: DC-DC CONVERTER date 10/29/2013 │ page 4 of 6
Recommended external circuit components
Vin (Vdc) 24 48
FUSE choose according to practical input current
MOV 10D560K 10D101K
LDM1 56μH56μH
TVS SMCJ48A SMCJ90A
C0 120μF/50V 120μF/100V
C1 225K/50V 225K/100V
LDM2 4.7μH 4.7μH
CY1 102K/2000V 102K/2000V
CY2 102K/2000V 102K/2000V
EMC RECOMMENDED CIRCUIT
DERATING CURVES
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40 -20 0 20 40 60 8571 100
Safe operating area
LDM2
C0
TVS
LDM1
MOV
FUSE
C1
Vin
GND
+
Vin
GND
+Vo
-Vo
(0V)
EUT
LOAD
CY2
CY1
(a) (b)
10 Sec. Max.
Wave Soldering Time
4 Sec. Max.
Peak Temp. 260°C Max.
Time (sec.)
Temperature (°C)
250
200
150
100
50
0
Wave Soldering Profi le Temperature Derating Curve
Figure 1
Table 1
Figure 2 Table 2
TEST CONFIGURATION
DC
Cin
Lin
DC
Load
Oscilloscope
Current
Probe
Note: Input refl 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
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CUI Inc │ SERIES: PQD6-D │ DESCRIPTION: DC-DC CONVERTER date 10/29/2013 │ page 5 of 6
1. 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 the capacitance accord-
ingly or choose capacitors with low ESR (see Table 3). However, the capacitance of the output fi lter capacitor must be appropriate. If
the capacitance is too high, a startup problem might arise. For every channel of the output, to ensure safe and reliable operation, the
maximum capacitance must be less than the maximum capacitive load (see Table 4).
APPLICATION NOTES
Figure 3
Note: 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 specifi cations listed.
2. Maximum capacitive load is tested at input voltage range and full load.
3. All specifi cations are measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specifi ed.
DC DC
Vin
GND
+Vo
0V
Cin
Vin
GND
+Vo
0V
Cin
DC DC
-Vo
Dual Output
Single Output
Table 3 Table 4
Vin
(Vdc)
Cin
(μF)
Cout
(μF)
24 100 10
48 10~47 10
Single Vout
(Vdc)
Max. Capacitive Load
(μF)
Dual Vout
(Vdc)
Max. Capacitive Load1
(μF)
3.3 1800 -- --
5 1000 ±5 470
12 100 ±12 100
15 100 ±15 100
24 47 -- --
Note: 1. For each output.
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CUI Inc │ SERIES: PQD6-D │ DESCRIPTION: DC-DC CONVERTER date 10/29/2013 │ page 6 of 6
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 06/17/2013
1.01 added CE safety approval 10/29/2013
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.:
PQD6-Q48-S5-D PQD6-Q48-S3-D PQD6-Q24-S3-D PQD6-Q24-S5-D PQD6-Q24-D12-D PQD6-Q48-D15-D
PQD6-Q24-D15-D PQD6-Q48-S12-D PQD6-Q48-D12-D PQD6-Q24-D5-D PQD6-Q24-S15-D PQD6-Q24-S24-D
PQD6-Q48-S15-D PQD6-Q48-S24-D PQD6-Q48-D5-D PQD6-Q24-S12-D
