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06/16/2015
1 of 7
SERIES:
PYB20
│
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
• temperature range (-40~85°C)
• UL 60950-1 approval
• 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
2
max
(mVp-p)
efficiency
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
1
PYB20-Q48-S5
1
PYB20-Q48-S12
1
PYB20-Q48-S15
1
PYB20-Q48-S24
1
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. 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.
PART NUMBER KEY
PYB20 - QXX -
XXX
-
X
Heatsink
"blank" = no heatsink
H = with heatsink
Base Number
Input Voltage
Output
S = single
D = dual
Output Voltage
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SERIES:
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DESCRIPTION:
DC-DC CONVERTER
date
06/16/2015
│
page
2 of 7
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
safety approvals
5
Note:
conditions/description
input to output for 1 minute at 1 mA max.
input to output at 500 Vdc
UL 60950-1, CE
min
1,500
1,000
typ
max
units
Vdc
MΩ
5. See specific models noted on page 1, excludes heat sink versions.
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DESCRIPTION:
DC-DC CONVERTER
date
06/16/2015
│
page
3 of 7
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
SOLDERABILITY
parameter
hand soldering
wave soldering
conditions/description
1.5 mm from case for 10 seconds
see wave soldering profile
Peak.Temp 260 Max
250
min
typ
max
300
260
units
°C
°C
Every Wave Soldering
Time 4 sec.Max
200
Temperature ( )
10 Sec Max
150
100
50
0
MECHANICAL
parameter
dimensions
case material
weight
conditions/description
Time (sec.)
min
typ
max
units
mm
mm
board mount: 50.8 x 25.4 x 11.8
board mount with heatsink: 50.8 x 25.4 x 16.3
aluminum alloy
board mount
board mount with heatsink
28
36
g
g
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DESCRIPTION:
DC-DC CONVERTER
date
06/16/2015
│
page
4 of 7
MECHANICAL DRAWING
BOARD MOUNT
units: mm[inch]
tolerance: ±0.3[±0.012]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
Grid Size: 2.54mm x 2.54mm
PIN CONNECTIONS
PIN
1
2
3
4
5
6
Single
Output
GND
Vin
+Vo
Trim
0V
CTRL
Dual
Output
GND
Vin
+Vo
0V
-Vo
CTRL
Front View
PCB Layout
Top View
Bottom View
BOARD MOUNT WITH HEATSINK
units: mm[inch]
tolerance: ±0.3[±0.012]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
Grid Size: 2.54mm x 2.54mm
PIN CONNECTIONS
PIN
1
2
3
4
5
6
Single
Output
GND
Vin
+Vo
Trim
0V
CTRL
Dual
Output
GND
Vin
+Vo
0V
-Vo
CTRL
Front View
PCB Layout
Top View
Top View
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DESCRIPTION:
DC-DC CONVERTER
date
06/16/2015
│
page
5 of 7
DERATING CURVES
With heatsink
100
80
Without heatsink
60
40
20
Load (%)
Safe operating area
-40
-20
0
20
40
55 60
85
Ambient Temperature (°C)
EMC RECOMMENDED CIRCUIT
Table 1
Figure 1
FUSE
+
C1
LDM1
CY1
Vin
C0
+Vo
LOAD
Recommended external circuit components
Vin (Vdc)
FUSE
MOV
LDM1
C0
C1
CY1
CY2
Note:
24
S14K35
4.7μH
330μF/50V
1μF/50V
1nF/2kV
1nF/2kV
48
S14K60
4.7μH
330μF/100V
1μF/100V
1nF/2kV
1nF/2kV
Vin
Choose according to input current
M OV
GND
DC / DC
(b)
GND
CY2
-Vo
( 0 V)
Cout
(a)
1. See Table 2 for Cout values.
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