Product Page 30 Model PCB Faalgnnl A \vcunNc a be‘ gvoup “€15 C e cflus XX XXX X K//\\ Voltage Output
cui.com
date 02/24/2021
page 1 of 7
SERIES: PYB15 DESCRIPTION: DC-DC CONVERTER
date
page 1 of 7
FEATURES
• up to 15 W isolated output
• industry standard pinout
• 4:1 input range (9~36 Vdc, 18~75 Vdc)
• smaller package
• single/dual regulated outputs
• 1,500 Vdc isolation
• continuous short circuit, over current protection, over voltage protection
• temperature range (-40~85°C)
• six-sided metal shielding
• efficiency up to 90%
• EN 62368-1
MODEL input
voltage
output
voltage
output
current
output
power
ripple
and noise2
efficiency
typ
(Vdc)
range
(Vdc) (Vdc)
min
(mA)
max
(mA)
max
(W)
max
(mVp-p)
typ
(%)
PYB15-Q24-S3 24 9~36 3.3 200 4000 13.2 100 87
PYB15-Q24-S5 24 9~36 5 150 3000 15 100 90
PYB15-Q24-S12 24 9~36 12 63 1250 15 100 89
PYB15-Q24-S15 24 9~36 15 50 1000 15 100 89
PYB15-Q24-S24 24 9~36 24 31 625 15 100 90
PYB15-Q24-D5 24 9~36 ±5 ±75 ±1500 15 100 86
PYB15-Q24-D12 24 9~36 ±12 ±32 ±625 15 100 88
PYB15-Q24-D15 24 9~36 ±15 ±25 ±500 15 100 88
PYB15-Q48-S3148 18~75 3.3 200 4000 13.2 100 87
PYB15-Q48-S51* 48 18~75 5 150 3000 15 100 89
PYB15-Q48-S12148 18~75 12 63 1250 15 100 88
PYB15-Q48-S15148 18~75 15 50 1000 15 100 90
PYB15-Q48-D5 48 18~75 ±5 ±75 ±1500 15 100 86
PYB15-Q48-D12 48 18~75 ±12 ±32 ±625 15 100 88
PYB15-Q48-D15 48 18~75 ±15 ±25 ±500 15 100 89
Notes: 1. UL approved
2. 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.
3. * Discontinued model.
PART NUMBER KEY
PYB15 - QXX - XXX - X
Input Voltage Output Voltage
Heatsink*
Base Number
S = single
D = dual
"blank" = no heatsink
H = with heatsink
Output
Notes: *Discontinued heatsink versions.
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CUI Inc SERIES: PYB15 DESCRIPTION: DC-DC CONVERTER date 02/24/2021 page 2 of 7
INPUT
parameter conditions/description min typ max units
operating input voltage 24 Vdc input models
48 Vdc input models
9
18
24
48
36
75
Vdc
Vdc
start-up voltage 24 Vdc input models
48 Vdc input models
9
17.8
Vdc
Vdc
under voltage shutdown124 Vdc input models
48 Vdc input models
7.5
16
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
filter pi filter
CTRL2
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
Notes: 1. Contact CUI if you are planning to use this feature in your application.
2. 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 5% to 100% load ±0.5 ±1 %
cross regulation
dual output models:
main output 50% load, secondary output from
10% to 100% load
±5 %
voltage accuracy ±1 ±3 %
voltage balance3dual output, balanced loads ±0.5 ±1 %
adjustability4±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 coefficient 100% load ±0.02 %/°C
Note: 3. For dual output models, unbalanced loads should not exceed ±5%. If ±5% is exceeded, it may not meet all specifications.
4. Output trimming available on single output models only.
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection hiccup, continuous, automatic recovery
over current protection 160 %
over voltage protection
3.3 Vdc output models
5 Vdc output models
12 Vdc output models
15 Vdc output models
24 Vdc output models
3.9
6.2
15
18
30
Vdc
Vdc
Vdc
Vdc
Vdc
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
safety approvals5certified to 62368-1: EN
certified to 60950-1: UL
Note: 5. See specific models noted on page 1, excludes heat sink versions.
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Product Page 30 Model PCB Foolgnnl PeakTemDZfiD Max ) Yempevaiuvel
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CUI Inc SERIES: PYB15 DESCRIPTION: DC-DC CONVERTER date 02/24/2021 page 3 of 7
SAFETY AND COMPLIANCE (CONTINUED)
parameter conditions/description min typ max units
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 2011/65/EU
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, 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 profile 260 °C
MECHANICAL
parameter conditions/description min typ max units
dimensions board mount: 50.8 x 25.4 x 11.8
board mount with heatsink: 50.8 x 25.4 x 16.3
mm
mm
case material aluminum alloy
weight board mount
board mount with heatsink
28
36
g
g
0
50
100
150
200
250
Time (sec.)
Temperature ()ć
Peak.Temp 260 Maxć
10 MaxSec
Every Wave Solderin
g
Time 4 sec.Max
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CUI Inc SERIES: PYB15 DESCRIPTION: DC-DC CONVERTER date 02/24/2021 page 4 of 7
units: mm[inch]
tolerance: ±0.3[±0.012]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
MECHANICAL DRAWING
BOARD MOUNT WITH HEATSINK
BOARD MOUNT
Top View
Front View
Top View
PCB Layout
Grid Size: 2.54mm x 2.54mm
PIN CONNECTIONS
PIN Single
Output
Dual
Output
1 GND GND
2 Vin Vin
3+Vo +Vo
4 Trim 0V
5 0V -Vo
6 CTRL CTRL
PIN CONNECTIONS
PIN Single
Output
Dual
Output
1 GND GND
2 Vin Vin
3+Vo +Vo
4 Trim 0V
5 0V -Vo
6 CTRL CTRL
units: mm[inch]
tolerance: ±0.3[±0.012]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
Top View
PCB Layout
Grid Size: 2.54mm x 2.54mm
Front View
Bottom View
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Product Page 30 Model PCB Foolgnnl w‘m he Load (”/a)
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CUI Inc SERIES: PYB15 DESCRIPTION: DC-DC CONVERTER date 02/24/2021 page 5 of 7
Recommended external circuit components
Vin (Vdc) 24 48
FUSE Choose according to input current
MOV S14K35 S14K60
LDM1 4.7μH 4.7μH
C0 330μF/50V 330μF/100V
C1 1μF/50V 1μF/100V
CY1 1nF/2kV 1nF/2kV
CY2 1nF/2kV 1nF/2kV
EMC RECOMMENDED CIRCUIT
LDM1
C0
MOV
FUSE
(a) (b)
C1
Vin
GND
+
Vin
GND
+Vo
-Vo
(0V)
DC /DC
CY1
CY2
Cout
LOAD
Figure 1
Table 1
DERATING CURVES
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 02040608565
Safe operating area
Without heatsink
With heatsink
Note: 1. See Table 2 for Cout values.
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Product Page 30 Model PCB Fumgnm Reco Th \ 5 test mg Smgle Output Dual Oulpm 7 44E? I: O .w ”,0 ?44H H
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CUI Inc SERIES: PYB15 DESCRIPTION: DC-DC CONVERTER date 02/24/2021 page 6 of 7
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 2). 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 2). However, the capacitance of the output filter 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 3).
2. Output voltage trimming
Leave open if not used.
Application Circuit for Trim pin Formula for Trim Resistor
(part in broken line is the interior of models)
Note: Value for R1, R2, R3, and Vref refer to Table 4
RT: Trim Resistor
a: User-defined parameter, no actual meanings
Vo': The trim up/down voltage
APPLICATION NOTES
Figure 2
Figure 3
Table 2 Table 3
Table 4
Single Vout
(Vdc)
Cin
(µF)
Cout
(µF)
Dual Vout
(Vdc)
Cin
(µF)
Cout1
(µF)
3.3 100 470 -- -- --
5 100 470 ±5 100 220
12 100 220 ±12 100 100
15 100 220 ±15 100 100
24 100 100 -- -- --
Vout
(Vdc)
R1
(kΩ)
R2
(kΩ)
R3
(kΩ)
Vref
(V)
3.3 4.801 2.863 15 1.24
5 2.883 2.864 10 2.5
12 10.971 2.864 17.8 2.5
15 14.497 2.864 17.8 2.5
24 24.872 2.863 20 2.5
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 specifications listed.
2. Maximum capacitive load is tested at input voltage range and full load.
3. All specifications are measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
+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
DC DC
Vin
GN
D
+Vo
0V
CinCout
Vi n
GND
+V
o
0V
Cin
Cout
DC DC
-Vo
Cout
Dual Outpu
t
Single Output
-a
2
aR 1
R2
-a
R1-R3
-R3
:a=
Vo’ - Vref
Vo’ - Vref
R
R=
T
:a= R
R=
T
up
n
Note: 1. For each output.Note: 1. For each output.
Single Vout
(Vdc)
Max. Capacitive Load
(μF)
Dual Vout
(Vdc)
Max. Capacitive Load1
(μF)
3.3 10200 -- --
5 4020 5 4800
12 1035 12 800
15 705 15 500
24 470 -- --
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Product Page 30 Model PCB Foolgnnl A \vcunNc u be‘ group
CUI Inc SERIES: PYB15 DESCRIPTION: DC-DC CONVERTER date 02/24/2021 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 06/26/2013
1.01 updated spec 08/15/2013
1.02 added CE safety approval 10/29/2013
1.03 updated spec 08/18/2014
1.04 added UL approval to some models 06/15/2015
1.05 discontinued heat sink versions 02/07/2019
1.06 safeties updated in features and safety approvals line 02/24/2021
1.07 discontinued model PYB15-Q48-S5 03/02/2021
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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