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date 11/23/2020
page 1 of 7
SERIES: PRM3W-S │ DESCRIPTION: DC-DC CONVERTER
date 11/23/2020
page 1 of 7
FEATURES
• 3 W isolated output
• 8:1 input range (4.5~36)
• single & dual regulated output
• 3k Vdc isolation
• short circuit, over current, input under voltage protection
• wide operating temperature range -40~105°C
• efficiency up to 79%
• EN62368 certified
PART NUMBER KEY
PRM3W - EXX - XXX - S
Input Voltage Output
S = single
D = dual
Packaging Style
SIP
Output Voltage
Base Number
MODEL input
voltage
output
voltage
output
current
output
power
ripple
and noise1
eciency
typ
(Vdc)
range
(Vdc) (Vdc)
max
(mA)
max
(W)
max
(mVp-p)
typ2
(%)
PRM3W-E12-S5-S 12 4.5~36 5 600 3.0 100 77
PRM3W-E12-S12-S 12 4.5~36 12 250 3.0 100 79
PRM3W-E12-S15-S 12 4.5~36 15 200 3.0 100 79
PRM3W-E12-D5-S 12 4.5~36 ±5 ±300 3.0 100 77
PRM3W-E12-D12-S 12 4.5~36 ±12 ±125 3.0 100 79
PRM3W-E12-D15-S 12 4.5~36 ±15 ±100 3.0 100 79
Notes: 1. Ripple & noise testing condition at nominal input voltage and 5%-100% load, the “parallel cable” method is used for ripple and noise test, please refer to DC-DC
Converter Application Notes for specic information.
2. Measured at nominal input and full load.
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CUI Inc │ SERIES: PRM3W-S │ DESCRIPTION: DC-DC CONVERTER date 11/23/2020 │ page 2 of 7
INPUT
parameter conditions/description min typ max units
input voltage 4.5 12 40 Vdc
start-up voltage 4.5 Vdc
surge voltage 1 second max -0.7 50 Vdc
lter capacitance lter
current
full load/no load
5 Vdc/±5 Vdc output models
other output models
324/8
316/8
334/16
325/16
mA
mA
OUTPUT
parameter conditions/description min typ max units
line regulation
min to max Vin
+Vo
-Vo
±0.5
±1
%
%
load regulation
5% ~ 100% load
+Vo
-Vo
±1
±1.5
%
%
set-point accuracy 0% ~ 100% load ±1 ±3 %
switching frequency PWM mode 300 kHz
transient response
25% load step change
5 Vdc/±5 Vdc output models
other output models
±5
±3
±8
±5
%
%
temperature coecient full load ±0.03 %/°C
PROTECTIONS
parameter conditions/description min typ max units
over current protection 110 300 %
short circuit protection continuous, self-recovery
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
isolation voltage input to output 1mA max for 1 minute 3,000 Vdc
isolation resistance input to output at 500 Vdc 1,000 MΩ
isolation capacitance input to output capacitance at 100 KHz / 0.1 V 40 pF
safety approvals certied to 62368:EN, IEC
EMC/EMC CISPR32/EN55032 CLASS B (see Fig.3-2 for recommended circuit)/CLASS A
(see Fig.4 for recommended circuit)
ESD IEC/EN61000-4-2 Contact ±4KV perf. Criteria B
radiated immunity IEC/EN61000-4-3 10V/m perf. Criteria A
EFT/burst IEC/EN61000-4-4 ±2KV (see Fig.3-1 for recommended circuit) perf. Criteria B
surge IEC/EN61000-4-5 line to line ±2KV (see Fig.3-1 for recommended circuit) perf. Criteria B
conducted immunity IEC/EN61000-4-6 3 Vr.m.s perf. Criteria A
RoHS yes
MTBF as per MIL-HDBK-217F at 25°C 1,000 kHours
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CUI Inc │ SERIES: PRM3W-S │ DESCRIPTION: DC-DC CONVERTER date 11/23/2020 │ page 3 of 7
ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature see derating curve -40 105 °C
storage temperature -55 125 °C
humidity non-condensing 5 95 %
SOLDERABILITY
parameter conditions/description min typ max units
hand soldering 1.5 mm from case for 10 seconds 300 °C
DERATING CURVE
Figure 1
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CUI Inc │ SERIES: PRM3W-S │ DESCRIPTION: DC-DC CONVERTER date 11/23/2020 │ page 4 of 7
MECHANICAL
parameter conditions/description min typ max units
dimensions 22.00 × 9.50 ×12.00 mm
case material Black plastic; ame-retardant and heat-resistant (UL94-V0)
weight 4.5 g
MECHANICAL DRAWING
units: mm [inches]
pin section tolerance: ±0.10 [±0.004]
tolerance: ± 0.50 [±0.020]
PIN CONNECTIONS
PIN Single Dual
1 GND GND
2 Vin Vin
3 NC NC
5 NC NC
6+Vo +Vo
7 0V 0V
8 NC -Vo
Note: NC not available for electrical
connection.
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CUI Inc │ SERIES: PRM3W-S │ DESCRIPTION: DC-DC CONVERTER date 11/23/2020 │ page 5 of 7
RECOMMENDED CIRCUITS
EMC COMPLIANCE CIRCUITS
Parameter Description
Single Vout
(Vdc)
Cout
(µF)
Cin
(µF)
5/12/15 22
(25V)
100
(50V)
Parameter Description
FUSE Select fuse value according to actual input current
C0 1000µF/50V
C4 330µF/50V
C1/C2/C3 10µF/50V
LCM1 3.3mH
LDM1 4.7µH
CY1/CY2 1nF/3KV
C5/C6 Refer to the Cout in Figure 2
Parameter Description
Dual Vout
(Vdc)
Cout
(µF)
Cin
(µF)
±5/±12/±15 22
(25V)
100
(50V)
Figure 2
Single output
Dual output
Figure 3
Note: For EMC tests was used Part 1 in Figure 3 for immunity and Part 2 for emissions test. Selecting based on needs.
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CUI Inc │ SERIES: PRM3W-S │ DESCRIPTION: DC-DC CONVERTER date 11/23/2020 │ page 6 of 7
EMC COMPLIANCE CIRCUITS (CONTINUED)
Parameter Description
FUSE Select fuse value according to actual input current
C1/C2 10µF/50V
LDM1 22µH
C3/C4 Refer to the Cout in Figure 4
Figure 4
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CUI Inc │ SERIES: PRM3W-S │ DESCRIPTION: DC-DC CONVERTER date 11/23/2020 │ page 7 of 7
CUI oers 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 aect its safety or eectiveness.
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Fax 503.612.2383
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techsupport@cui.com
rev. description date
1.0 initial release 11/23/2020
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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