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date
page
06/16/2015
1 of 8
SERIES:
PYB20-T & PYB20-U
│
DESCRIPTION:
DC-DC CONVERTER
FEATURES
• up to 20 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
• reverse polarity protection on chassis mount (-T) models
• temperature range (-40~85°C)
• six-sided metal shielding
• efficiency up to 90%
MODEL
typ
(Vdc)
input
voltage
range
(Vdc)
output
voltage
(Vdc)
min
(mA)
output
current
max
(mA)
output
power
max
(W)
ripple
and noise
1
max
(mVp-p)
efficiency
2
typ
(%)
PYB20-Q24-S3
PYB20-Q24-S5
PYB20-Q24-S12
PYB20-Q24-S15
PYB20-Q24-S24
PYB20-Q24-D5
PYB20-Q24-D12
PYB20-Q24-D15
PYB20-Q48-S3
PYB20-Q48-S5
PYB20-Q48-S12
PYB20-Q48-S15
PYB20-Q48-S24
PYB20-Q48-D5
PYB20-Q48-D12
PYB20-Q48-D15
Notes:
24
24
24
24
24
24
24
24
48
48
48
48
48
48
48
48
9~36
9~36
9~36
9~36
9~36
9~36
9~36
9~36
18~75
18~75
18~75
18~75
18~75
18~75
18~75
18~75
3.3
5
12
15
24
±5
±12
±15
3.3
5
12
15
24
±5
±12
±15
250
200
84
67
42
±100
±42
±33
250
200
84
67
42
±100
±42
±33
5000
4000
1667
1333
834
±2000
±834
±667
5000
4000
1667
1333
834
±2000
±834
±667
16.5
20
20
20
20
20
20
20
16.5
20
20
20
20
20
20
20
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
86
90
89
90
90
86
88
88
86
90
89
90
90
86
88
89
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.
2. Efficiency is approximately 2% lower for chassis mount (-T) models.
PART NUMBER KEY
PYB20 - QXX -
XXX
-
X
-
X
Base Number
Input Voltage
Output
S = single
D = dual
Output Voltage
Mounting Type
T = Chassis mount
U = U-frame
Heatsink
"blank" = no heatsink
H = with heatsink
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For more information, please visit the
product page.
CUI Inc
│
SERIES:
PYB20-T & PYB20-U
│
DESCRIPTION:
DC-DC CONVERTER
date
06/16/2015
│
page
2 of 8
INPUT
parameter
operating input voltage
start-up voltage
under voltage shutdown
1
surge voltage
start-up time
filter
CTRL
2
Notes:
conditions/description
24 Vdc input models
48 Vdc input models
24 Vdc input models
48 Vdc input models
24 Vdc input models
48 Vdc input models
for maximum of 1 second
24 Vdc input models
48 Vdc input models
nominal input, constant load
pi filter
min
9
18
typ
24
48
max
36
75
9
17.8
units
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
7.5
16
-0.7
-0.7
10
50
100
Vdc
Vdc
ms
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. Contact CUI if you are planning to use this feature in your application.
2. CTRL pin voltage is referenced to GND.
1
mA
OUTPUT
parameter
line regulation
load regulation
cross regulation
voltage accuracy
voltage balance
3
adjustability
4
switching frequency
transient recovery time
transient response deviation
temperature coefficient
Note:
conditions/description
full load, input voltage from low to high
5% to 100% load
dual output models:
main output 50% load, secondary output from
10% to 100% load
min
typ
±0.2
±0.5
max
±0.5
±1
±5
units
%
%
%
%
%
%
kHz
±1
dual output, balanced loads
PWM mode
25% load step change
25% load step change
100% load
±0.5
±10
300
300
±3
±3
±1
500
±5
±0.02
μs
%
%/°C
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
short circuit protection
over current protection
3.3 Vdc output models
5 Vdc output models
12 Vdc output models
15 Vdc output models
24 Vdc output models
conditions/description
hiccup, continuous, automatic recovery
160
3.9
6.2
15
18
30
%
Vdc
Vdc
Vdc
Vdc
Vdc
min
typ
max
units
over voltage protection
SAFETY AND COMPLIANCE
parameter
isolation voltage
isolation resistance
conditions/description
for 1 minute at 1 mA max.
at 500 Vdc
min
1,500
1,000
typ
max
units
Vdc
MΩ
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product page.
CUI Inc
│
SERIES:
PYB20-T & PYB20-U
│
DESCRIPTION:
DC-DC CONVERTER
date
06/16/2015
│
page
3 of 8
SAFETY AND COMPLIANCE (CONTINUED)
parameter
conducted emissions
radiated emissions
ESD
radiated immunity
EFT/burst
surge
conducted immunity
voltage dips & interruptions
MTBF
RoHS
conditions/description
min
typ
max
units
CISPR22/EN55022, class A, class B (external circuit required, see Figure 1-b)
CISPR22/EN55022, class A, class B (external circuit required, see Figure 1-b)
IEC/EN61000-4-2, class B, contact ± 4kV
IEC/EN61000-4-3, class A, 10V/m
IEC/EN61000-4-4, class B, ± 2kV (external circuit required, see Figure 1-a)
IEC/EN61000-4-5, class B, ± 2kV (external circuit required, see Figure 1-a)
IEC/EN61000-4-6, class A, 3 Vr.m.s
IEC/EN61000-4-29, class B, 0%-70%
as per MIL-HDBK-217F @ 25°C
2011/65/EU
1,000,000
hours
ENVIRONMENTAL
parameter
operating temperature
storage temperature
storage humidity
case temperature
vibration
non-condensing
at full load, Ta=71°C
10~55 Hz for 30 min. along X, Y and Z axis
10
conditions/description
see derating curves
min
-40
-55
5
typ
max
85
125
95
105
units
°C
°C
%
°C
G
MECHANICAL
parameter
dimensions
case material
weight
conditions/description
chassis mount: 76 x 31.5 x 21.2
chassis mount with heatsink: 76 x 31.5 x 25.10
U-Frame: 52.32 x 54.99 x 19.05
U-Frame with heatsink: 52.32 x 54.99 x 22.90
aluminum alloy
chassis mount
chassis mount with heatsink
U-Frame
U-Frame with heatsink
50
58
58
66
g
g
g
g
min
typ
max
units
mm
mm
mm
mm
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For more information, please visit the
product page.
CUI Inc
│
SERIES:
PYB20-T & PYB20-U
│
DESCRIPTION:
DC-DC CONVERTER
date
06/16/2015
│
page
4 of 8
MECHANICAL DRAWING
CHASSIS MOUNT
units: mm[inch]
tolerance: ±0.50[±0.02]
wire range: 24~12 AWG
PIN CONNECTIONS
PIN
1
2
3
4
5
6
Single
Output
CTRL
GND
Vin
0V
Trim
+Vo
Dual
Output
CTRL
GND
Vin
-Vo
0V
+Vo
Top View
Front View
CHASSIS MOUNT WITH HEATSINK
units: mm[inch]
tolerance: ±0.50[±0.02]
wire range: 24~12 AWG
PIN CONNECTIONS
PIN
1
2
3
4
5
6
Single
Output
CTRL
GND
Vin
0V
Trim
+Vo
Dual
Output
CTRL
GND
Vin
-Vo
0V
+Vo
Top View
Front View
cui.com
For more information, please visit the
product page.
CUI Inc
│
SERIES:
PYB20-T & PYB20-U
│
DESCRIPTION:
DC-DC CONVERTER
date
06/16/2015
│
page
5 of 8
MECHANICAL DRAWING (CONTINUED)
U-FRAME
units: mm[inch]
tolerance: ±0.50[±0.02]
wire range: 22~14 AWG
DIN-rail mounting kit available
(part# STK-DIN)
PIN CONNECTIONS
PIN
1
2
3
4
5
6
7
8
Single
Output
GND
Vin
CTRL
Case
NC
+Vo
Trim
0V
Dual
Output
GND
Vin
CTRL
Case
NC
+Vo
0V
-Vo
19.05 0.750
1.00 0.039
(TYP)
1
2
3
4
5
6
7
8
9.16 0.361
0.010
5.21 0.205
(2 PLCS)
10.99 0.433
0.010 (2 PLCS)
33.02 1.300
0.010 (2 PLCS)
12.19 0.480
5.31 0.209
(5 PLCS)
M3X4
(5 PLCS)
52.32 2.060
34.01 1.339
0.010
54.99 2.165
4.75 0.187
(2 PLCS)
3.51 0.138
(2 PLCS)
0.079 X 0.157
[2.01 X 3.99]
(2 PLCS)
20.32 0.800
0.010 (2 PLCS)
R1.76 0.069
(2 PLCS)
34.93 1.375
0.010
Top View
52.99 2.086
Bottom View
4.01 0.158
0.010 (TYP)
Front View
U-FRAME WITH HEATSINK
units: mm[inch]
tolerance: ±0.50[±0.02]
wire range: 22~14 AWG
DIN-rail mounting kit available
(part# STK-DIN)
PIN CONNECTIONS
PIN
1
2
3
4
5
6
7
8
Single
Output
GND
Vin
CTRL
Case
NC
+Vo
Trim
0V
Dual
Output
GND
Vin
CTRL
Case
NC
+Vo
0V
-Vo
4.01 0.158
0.010 (TYP)
22.90 0.902
1.00 0.039
(TYP)
1
2
3
4
5
6
7
8
9.16 0.361
0.010
5.21 0.205
(2 PLCS)
10.99 0.433
0.010 (2 PLCS)
33.02 1.300
0.010 (2 PLCS)
12.19 0.480
5.31 0.209
(5 PLCS)
M3X4
(5 PLCS)
52.32 2.060
34.01 1.339
0.010
54.99 2.165
4.75 0.187
(2 PLCS)
3.51 0.138
(2 PLCS)
0.079 X 0.157
[2.01 X 3.99]
(2 PLCS)
20.32 0.800
0.010 (2 PLCS)
R1.76 0.069
(2 PLCS)
34.93 1.375
0.010
Top View
52.99 2.086
Bottom View
Front View
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