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date 01/24/2019
page 1 of 11
SERIES: PYBE20 │ DESCRIPTION: DC-DC CONVERTER
FEATURES
• up to 20 W isolated output
• industry standard pin-out
• 4:1 input range (9~36 Vdc, 18~75 Vdc)
• single/dual regulated outputs
• 1500 Vdc isolation
• continuous short circuit protection
• efficiency up to 90%
• operating temperature range (-40~+85°C)
• UL 60950-1 approval on select models
MODEL input
voltage
output
voltage
output
current
output
power
ripple
& noise1
eciency2
typ
(Vdc)
range
(Vdc) (Vdc)
min
(mA)
max
(mA)
max
(W)
max
(mVp-p)
typ
(%)
PYBE20-Q24-S3 24 9~36 3.3 0 5000 16.5 100 86
PYBE20-Q24-S5 24 9~36 5 0 4000 20 100 88
PYBE20-Q24-S9 24 9~36 9 0 2222 20 100 89
PYBE20-Q24-S12 24 9~36 12 0 1667 20 100 89
PYBE20-Q24-S15 24 9~36 15 0 1333 20 100 90
PYBE20-Q24-S24 24 9~36 24 0 834 20 100 90
PYBE20-Q24-D5 24 9~36 ±5 0 ±2000 20 100 86
PYBE20-Q24-D9 24 9~36 ±9 0 ±1111 20 100 88
PYBE20-Q24-D12 24 9~36 ±12 0 ±834 20 100 88
PYBE20-Q24-D15 24 9~36 ±15 0 ±667 20 100 88
48 18~75 3.3 0 5000 16.5 100 86
PYBE20-Q48-S5 48 18~75 5 0 4000 20 100 86
PYBE20-Q48-S9 48 18~75 9 0 2222 20 100 89
PYBE20-Q48-S12 48 18~75 12 0 1667 20 100 87
PYBE20-Q48-S15 48 18~75 15 0 1333 20 100 90
PYBE20-Q48-S24 48 18~75 24 0 834 20 100 88
PYBE20-Q48-D5 48 18~75 ±5 0 ±2000 20 100 86
PYBE20-Q48-D12 48 18~75 ±12 0 ±834 20 100 88
PYBE20-Q48-D15 48 18~75 ±15 0 ±667 20 100 89
Notes: 1. From 5~100% load, nominal input, 20 MHz bandwidth oscilloscope, with 10 µF tantalum and 1 µF ceramic capacitors on the output. From 0~5% load, ripple and noise is
<5% Vo.
to the input reverse polarity protection.
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date 01/24/2019 │ page 2 of 11CUI Inc │ SERIES: PYBE20 │ DESCRIPTION: DC-DC CONVERTER
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
18
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
under voltage shutdown 24 Vdc input models
48 Vdc input models
5.5
12
6.5
15.5
Vdc
Vdc
current
24 Vdc input models
3.3 Vdc output models
5 Vdc output models
all other models
818
993
969
mA
mA
MA
48 Vdc input models
3.3 Vdc output models
5 Vdc output models
all other models
409
497
485
mA
mA
mA
4
turn on (3.5~12 Vdc or open circuit)
4 7 mA
input reverse polarity protection
no load power consumption 0.15 W
OUTPUT
parameter conditions/description min typ max units
maximum capacitive load5
3.3, 5 Vdc output models
9 Vdc output models
12 Vdc output models
24 Vdc output models
±5 Vdc output models
15, ±9 Vdc output models
±12 Vdc output models
±15 Vdc output models
10,000
4,700
1,600
500
4,800
1,000
800
625
voltage accuracy60% to full load ±1 ±3 %
line regulation
from low line to high line, full load
positive outputs
negative outputs
±0.2
±0.5
±0.5
±1
%
%
load regulation7
from 5% to full load
positive outputs
negative outputs
±0.5
±0.5
±1
±1.5
%
%
Note: 5. Tested at input voltage range and full load.
6. At 0~5% load, the max output voltage accuracy for the ±5 & ±9 Vdc output models is ±5%.
7. At 0~100% load, the max load regulation is ±5%.
PART NUMBER KEY
Base Number
PYBE20 - QXX - X XX - X
Output Voltage
Output:
Mounting Style:
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date 01/24/2019 │ page 3 of 11CUI Inc │ SERIES: PYBE20 │ DESCRIPTION: DC-DC CONVERTER
OUTPUT (CONTINUED)
parameter conditions/description min typ max units
cross regulation
dual output models:
main output 50% load
secondary output from 10~100% load
±5 %
start-up time nominal input, constant resistive load 10 ms
adjustability8see application notes ±10 %
switching frequency9PWM mode 270 kHz
transient recovery time 25% load step change, nominal input voltage 300 500
transient response deviation
25% load step change, nominal input voltage
3.3, 5, ±5 Vdc output models
all other models
±5
±3
±8
±5
%
%
at full load ±0.03 %/°C
Note: 8. For single output models only.
9. Value is based on full load. At loads <50%, the switching frequency decreases with decreasing load
PROTECTIONS
parameter conditions/description min typ max units
over voltage protection 110 160 %
over current protection 110 190 %
short circuit protection hiccup, continuous, self recovery
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
isolation voltage input to output for 1 minute at 1 mA 1,500 Vdc
isolation resistance input to output at 500 Vdc 1,000
isolation capacitance
input to output, 100 kHz / 0.1 V
PYBE20-Q24-S24
all other models
2,050
1,050
pF
pF
safety approvals10, 11 UL 60950-1, EN 62368-1
conducted emissions
radiated emissions
ESD
radiated immunity
EFT/burst
surge
conducted immunity
voltage dips & interruptions
MTBF 1,000,000 hours
yes
Note: 10. UL approval only for board mount models.
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date 01/24/2019 │ page 4 of 11CUI Inc │ SERIES: PYBE20 │ DESCRIPTION: DC-DC CONVERTER
10 Sec. Max.
Wave Soldering Time
4 Sec. Max.
Peak Temp. 260°C Max.
Time (sec.)
Temperature (°C)
250
200
150
100
50
0
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 %
vibration 10~55 Hz, for 30 minutes on each axis 10
DERATING CURVES
SOLDERABILITY12
parameter conditions/description min typ max units
hand soldering 1.5 mm from case for 10 seconds 300 °C
wave soldering 260 °C
Note: 12. For board mount models only.
Ambient Temperature (°C)
Output Load (%
)
-40
60
80
100
40
20
04085
Temperature Derating Curve
(Natural Convection)
120
120
0
71
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date 01/24/2019 │ page 5 of 11CUI Inc │ SERIES: PYBE20 │ DESCRIPTION: DC-DC CONVERTER
4UZK-XOJSS
ෘ
A
ෘ
C
AC
ACAC
AC
ෘ
AC
AC
AC
ACAC
units: mm [inch]
tolerance: ±0.50[±0.020]
pin diameter tolerance: ±0.10[±0.004]
MECHANICAL
parameter conditions/description min typ max units
dimensions
board mount: 50.80 x 25.40 x 11.80 [2.000 x 1.000 x 0.465 inch]
chassis mount: 76.00 x 31.50 x 21.20 [2.992 x 1.240 x 0.835 inch]
mm
mm
mm
case material aluminum alloy
weight
board mount
chassis mount
25
48
68
g
g
g
MECHANICAL DRAWING (BOARD MOUNT)
Function
Single Dual
1
2 Vin Vin
3+Vo +Vo
4 trim 0V
5 0V -Vo
6
Top View
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date 01/24/2019 │ page 6 of 11CUI Inc │ SERIES: PYBE20 │ DESCRIPTION: DC-DC CONVERTER
AC
AC
AC
AC
r
ArC
AC
AC
2+*RGSV
units: mm [inch]
tolerance: ±0.50[±0.020]
tightening torque: max 0.4 N*m
MECHANICAL DRAWING (DIN-RAIL MOUNT)
Function
Single Dual
1
2
3 Vin Vin
4 0V -Vo
5 trim 0V
6+Vo +Vo
AC
AC
AC
AC
AC
A
C
2+*RGSV
ෘ
A
ෘ
C
units: mm [inch]
tolerance: ±0.50[±0.020]
tightening torque: max 0.4 N*m
MECHANICAL DRAWING (CHASSIS MOUNT)
Function
Single Dual
1
2
3 Vin Vin
4 0V -Vo
5 trim 0V
6+Vo +Vo
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date 01/24/2019 │ page 7 of 11CUI Inc │ SERIES: PYBE20 │ DESCRIPTION: DC-DC CONVERTER
APPLICATION CIRCUIT
Figure 1
Single Output Models
Table 1
DC DC
Vin
GND
+Vo
0V
Cin
Cout
Vout
(Vdc)
Cin
Cout
3.3/5 100 470
9/12/15 100 220
24 100 100
±5 100 220
±9/±12/±15 100 100
Figure 2
Dual Output Models
Vin
GND
+Vo
0V
Cin
Cout
DC DC
-Vo
Cout
This series has been tested according to the following recommended circuits (Figures 1 & 2) before leaving the factory.
capacitors of low equivalent impedance provided that the capacitance is less than the maximum capacitive load of the
model.
EMC RECOMMENDED CIRCUIT
Table 2
Figure 3
Single Output Models
Vin (Vdc) 24 48
FUSE choose according to actual input current
C0, C3 330 µF / 50 V 330 µF / 100 V
C1 1 µF / 50 V 1 µF / 100 V
C2
LDM1 4.7 µH / 3.1 A
CY1, CY2 1 nF / 2 kV
Figure 4
Dual Output Models
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date 01/24/2019 │ page 8 of 11CUI Inc │ SERIES: PYBE20 │ DESCRIPTION: DC-DC CONVERTER
Table 3
Vout
(Vdc)
Vref
(V)
3.3 4.801 2.87 12.4 1.24
5 2.883 2.87 10 2.5
9 7.500 2.87 15 2.5
12 11.000 2.87 15 2.5
15 14.494 2.87 15 2.5
24 24.872 2.87 17.8 2.5
Output voltage trimming
Leave open if not used.
(part in broken line is the interior of models)
T
Vo': The trim up/down voltage
Figure 5
+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
a
-a
R
2
aR 1
R2
-a
R1-R3
-R3
:a=
Vref
Vref
Vo’ - Vref
Vo’ - Vref
R
1
R=
T
:a= R
2
R=
T
up
down
APPLICATION NOTES
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date 01/24/2019 │ page 9 of 11CUI Inc │ SERIES: PYBE20 │ DESCRIPTION: DC-DC CONVERTER
PACKAGING (BOARD MOUNT)
units: mm
Tube Size: 54.3 x 20 mm
Outer Carton Size: 600 x 285 x 225 mm
Outer Carton QTY: 456 pcs
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date 01/24/2019 │ page 11 of 11CUI Inc │ SERIES: PYBE20 │ DESCRIPTION: DC-DC CONVERTER
Headquarters
20050 SW 112th Ave.
800.275.4899
Fax 503.612.2383
cui.com
techsupport@cui.com
rev. description date
1.0 initial release 01/24/2019
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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