PYB20-T/U Series Datasheet by CUI Inc.

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SERIES: PYB20-T & PYB20-U │ DESCRIPTION: DC-DC CONVERTER
date
page 1 of 8
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 input
voltage
output
voltage
output
current
output
power
ripple
and noise1
efficiency2
typ
(Vdc)
range
(Vdc) (Vdc)
min
(mA)
max
(mA)
max
(W)
max
(mVp-p)
typ
(%)
PYB20-Q24-S3 24 9~36 3.3 250 5000 16.5 100 86
PYB20-Q24-S5 24 9~36 5 200 4000 20 100 90
PYB20-Q24-S12 24 9~36 12 84 1667 20 100 89
PYB20-Q24-S15 24 9~36 15 67 1333 20 100 90
PYB20-Q24-S24 24 9~36 24 42 834 20 100 90
PYB20-Q24-D5 24 9~36 ±5 ±100 ±2000 20 100 86
PYB20-Q24-D12 24 9~36 ±12 ±42 ±834 20 100 88
PYB20-Q24-D15 24 9~36 ±15 ±33 ±667 20 100 88
PYB20-Q48-S3 48 18~75 3.3 250 5000 16.5 100 86
PYB20-Q48-S5 48 18~75 5 200 4000 20 100 90
PYB20-Q48-S12 48 18~75 12 84 1667 20 100 89
PYB20-Q48-S15 48 18~75 15 67 1333 20 100 90
PYB20-Q48-S24 48 18~75 24 42 834 20 100 90
PYB20-Q48-D5 48 18~75 ±5 ±100 ±2000 20 100 86
PYB20-Q48-D12 48 18~75 ±12 ±42 ±834 20 100 88
PYB20-Q48-D15 48 18~75 ±15 ±33 ±667 20 100 89
Notes: 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
Input Voltage
Output Voltage
Heatsink*
Mounting Type
Base Number
S = single
D = dual
"blank" = no heatsink
H = with heatsink
T = Chassis mount
U = U-frame
Output
Notes: *Discontinued heatsink versions.
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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 for 1 minute at 1 mA max. 1,500 Vdc
isolation resistance at 500 Vdc 1,000 MΩ
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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
MECHANICAL
parameter conditions/description min typ max units
dimensions
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
mm
mm
mm
mm
case material aluminum alloy
weight
chassis mount
chassis mount with heatsink
U-Frame
U-Frame with heatsink
50
58
58
66
g
g
g
g
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MECHANICAL DRAWING
CHASSIS MOUNT
CHASSIS MOUNT WITH HEATSINK
PIN CONNECTIONS
PIN Single
Output
Dual
Output
1 CTRL CTRL
2 GND GND
3 Vin Vin
4 0V -Vo
5 Trim 0V
6+Vo +Vo
PIN CONNECTIONS
PIN Single
Output
Dual
Output
1 CTRL CTRL
2 GND GND
3 Vin Vin
4 0V -Vo
5 Trim 0V
6+Vo +Vo
units: mm[inch]
tolerance: ±0.50[±0.02]
wire range: 24~12 AWG
units: mm[inch]
tolerance: ±0.50[±0.02]
wire range: 24~12 AWG
Top View
Front View
Top View
Front View
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MECHANICAL DRAWING (CONTINUED)
U-FRAME
U-FRAME WITH HEATSINK
PIN CONNECTIONS
PIN Single
Output
Dual
Output
1 GND GND
2 Vin Vin
3 CTRL CTRL
4 Case Case
5 NC NC
6+Vo +Vo
7 Trim 0V
8 0V -Vo
PIN CONNECTIONS
PIN Single
Output
Dual
Output
1 GND GND
2 Vin Vin
3 CTRL CTRL
4 Case Case
5 NC NC
6+Vo +Vo
7 Trim 0V
8 0V -Vo
units: mm[inch]
tolerance: ±0.50[±0.02]
wire range: 22~14 AWG
DIN-rail mounting kit available
(part# STK-DIN)
units: mm[inch]
tolerance: ±0.50[±0.02]
wire range: 22~14 AWG
DIN-rail mounting kit available
(part# STK-DIN)
4.75 0.187
(2 PLCS)
9.16 0.361
0.010
34.01 1.339
0.010
20.32 0.800
0.010 (2 PLCS)
1234
0.138
(2 PLCS)
3.51
52.32 2.060
52.99 2.086
0.158
0.010 (TYP)
(TYP)
0.0391.00
4.01
19.05 0.750
0.079 X 0.157
[2.01 X 3.99]
(2 PLCS)
33.02 1.300
0.010 (2 PLCS)
5.31
M3X4
(5 PLCS)
0.010
34.93 1.375
(2 PLCS)
0.205
12.19 0.480
5.21
54.99 2.165
0.010 (2 PLCS)
0.433
(5 PLCS)
0.209
10.99
R1.76 0.069
(2 PLCS)
Top View
Front View
Bottom View
5678
1234 58
Top View
Bottom View
Front View
22.90 0.902
4.75 0.187
(2 PLCS)
9.16 0.361
0.010
34.01 1.339
0.010
20.32 0.800
0.010 (2 PLCS)
52.99 2.086
1.00 0.039
(TYP)
4.01 0.158
0.010 (TYP)
67
0.138
(2 PLCS)
3.51
52.32 2.060
0.079 X 0.157
[2.01 X 3.99]
(2 PLCS)
5.31
M3X4
(5 PLCS)
0.48012.19
0.010
34.93 1.375
(2 PLCS)
0.205
2.16554.99
5.21 0.010 (2 PLCS)
33.02 1.300
0.010 (2 PLCS)
0.433
(5 PLCS)
0.209
10.99
R1.76 0.069
(2 PLCS)
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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 02040608555
Safe operating area
Without heatsink
With heatsink
Note: 1. See Table 2 for Cout values.
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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
-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
dow
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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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
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techsupport@cui.com
rev. description date
1.0 initial release 06/26/2013
1.01 updated spec 08/16/2013
1.02 updated spec 08/18/2014
1.03 updated spec 06/16/2015
1.04 discontinued heat sink versions 06/21/2019
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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