Datasheet

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date
08/29/2012
page
1 of 6
SERIES: VYB20W-T │ DESCRIPTION: DC-DC CONVERTER
chassis mount with screw terminal connectors
up to 20 W output
compact size
4:1 input range (9 ~ 36 V, 18 ~ 75 V)
single and dual outputs
1,500 V isolation
short circuit, over current, and over voltage protection
wide temperature operation (-40 ~ 85°C)
efficiency up to 88%
U
•
•
•
•
•
•
•
•
•
ED
FEATURES
input
voltage
output
voltage
range
(Vdc)
(Vdc)
min
(mA)
3.3
VYB20W-Q24-S3-T
9 ~ 36
VYB20W-Q24-S5-T
9 ~ 36
VYB20W-Q24-S12-T
9 ~ 36
VYB20W-Q24-S15-T
9 ~ 36
VYB20W-Q24-S24-T
9 ~ 36
VYB20W-Q24-D5-T
VYB20W-Q24-D12-T
output
power
ripple1
noise1
efficiency
max
(mA)
max
(W)
max
(mVp-p)
max
(mVp-p)
typ
(%)
500
5,000
16.5
150
150
83
400
4,000
20
150
150
86
167
1,667
20
150
150
87
15
133
1,333
20
150
150
88
24
83
834
20
150
150
88
9 ~ 36
±5
±200
±2,000
20
50
100
84
9 ~ 36
±12
±83
±833
20
50
100
87
9 ~ 36
±15
±67
±667
20
50
100
87
18 ~ 75
3.3
5,000
16.5
150
150
83
N
5
12
O
VYB20W-Q24-D15-T
VYB20W-Q48-S3-T
output
current
TI
MODEL
N
RoHS
500
VYB20W-Q48-D5-T
18 ~ 75
±5
±200
±2,000
20
50
100
84
VYB20W-Q48-D12-T
18 ~ 75
±12
±83
±833
20
50
100
87
VYB20W-Q48-D15-T
18 ~ 75
±15
±67
±667
20
50
100
88
VYB20W-Q48-S5-T
VYB20W-Q48-S12-T
VYB20W-Q48-S15-T
5
400
4,000
20
150
150
87
12
167
1,667
20
150
150
88
18 ~ 75
15
133
1,333
20
150
150
88
18 ~ 75
24
83
834
20
150
150
88
IS
C
VYB20W-Q48-S24-T
18 ~ 75
18 ~ 75
Notes:
1. Ripple and noise are measured at 20 MHz BW with 10μF tantalum capacitor and 1μF ceramic capacitor across output
D
PART NUMBER KEY
VYB20W - QXX - X XX - X - T
Output
S = single output
D = dual output
Base Number
Input Voltage
Output Voltage
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Heatsink
"blank" = No
H = Yes
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CUI Inc │ SERIES: VYB20W-T │ DESCRIPTION: DC-DC CONVERTER
date 08/29/2012 │ page 2 of 6
INPUT
conditions/description
operating input voltage
min
typ
max
units
9
18
24
48
36
75
Vdc
Vdc
start-up time
10
dual output models
power
power
power
power
Remote on/off1
all models
single output models
dual output models
filter
single output models, LC
dual output models, PI type
Notes:
up 24 V input
up 48 V input
down 24 V input
down 48 V input
7.8
16.0
module off
module on (or open circuit)
module on (or open circuit)
0
3.5
3.5
9.0
17.8
Vdc
Vdc
Vdc
Vdc
1.2
12
12
Vdc
Vdc
Vdc
U
dual output models
under voltage lockout
ms
ED
parameter
1. The on/off pin voltage is referenced to GND
N
OUTPUT
parameter
conditions/description
typ
max
units
line regulation
measured from low line to high line
min
±0.2
±0.5
%
±0.5
±1
%
±1
±3
%
200
500
μs
measured from 10% to full load
refer to recommended circuit
transient recovery time
25% step load charge
transient peak deviation
25% rated load
TI
load regulation
voltage accuracy
dual output models
adjustability
single output models
switching frequency
100% load, input voltage range
parameter
short circuit protection
conditions/description
±5
%
±5
%
±10%
Vdc
400
kHz
±0.02
%/°C
min
typ
max
units
120
120
130
140
150
150
%
%
hiccups, continuous, automatic recovery
single output models
dual output models
input voltage range
input voltage range
single output models
3.3 V
5V
12 V
15 V
24 V
±5 V
±12 V
±15 V
IS
C
over current protection
O
PROTECTIONS
N
cross regulation
temperature coefficient
±3
main output 55%,
supplemental output from
10~100% load
over voltage protection
D
dual output models
3.9
6.2
15
18
28
±6.1
±15
±18
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Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
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CUI Inc │ SERIES: VYB20W-T │ DESCRIPTION: DC-DC CONVERTER
date 08/29/2012 │ page 3 of 6
SAFETY AND COMPLIANCE
conditions/description
isolation voltage
tested for 1 minute at 1 mA max.
1,500
min
Vdc
isolation resistance
at 500 Vdc
1,000
MΩ
isolation capacitance
input to output, 100 kHz / 0.1 V
single output models
dual output models
RoHS compliant
yes
MTBF
M1L-HDBK-217F
max
pF
pF
1,000,000
min
hours
typ
U
conditions/description
case operating temperature
max
units
85
°C
105
°C
125
°C
-40
maximum case temperature
during operation
storage temperature
-55
non-condensing
temperature rise
100% load
5
lead temperature
1.5 mm from the case for 10 seconds
TI
N
storage humidity
DERATING CURVES
units
1,000
2,000
ENVIRONMENTAL
parameter
typ
ED
parameter
95
%
40
°C
300
°C
output power vs. ambient temperature
N
single output models
100
dual output models
100
2
80
Load (%)
1
60
O
≤5V models
Load (%)
2
80
40
40
20
-40
0
20
30
40
50
1
60
20
60
70
80
-40
0
20
IS
C
Ambient Temperature (°C)
D
Load (%)
100
>5V models
80
2
1
60
40
20
-40
0
20
30
40
50
60
30
40
50
60
Ambient Temperature (°C)
70
80
Ambient Temperature (°C)
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1
without heat sink
2
with heatsink
70
80
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CUI Inc │ SERIES: VYB20W-T │ DESCRIPTION: DC-DC CONVERTER
date 08/29/2012 │ page 4 of 6
MECHANICAL
conditions/description
dimensions
2.17 x 2.06 x 0.75 inch (55.0 x 52.3 x 19.1mm)
case material
aluminum
weight
min
typ
max
units
ED
parameter
70
85
with heat sink
MECHANICAL DRAWING
g
g
54.99 2.165
19.05 0.750
7
6
5
4
3
2
1
20.32 0.800
0.010 (2 PLCS)
D
N
12.19 0.480
33.02 1.300
0.010 (2 PLCS)
O
10.99 0.433
0.010 (2 PLCS)
5.31 0.209
(5 PLCS)
M3X4
(5 PLCS)
PIN CONNECTIONS
Pin
S ingle
Dual
0V
-Vo
1
IS
C
4.01 0.158
0.010 (TYP)
52.99 2.086
34.93 1.375
0.010
9.16 0.361
0.010
5.21 0.205
(2 PLCS)
1.00 0.039
(TYP)
R1.76 0.069
(2 PLCS)
34.01 1.339
0.010
TI
52.32 2.060
8
0.079 X 0.157
[2.01 X 3.99]
(2 PLCS)
U
3.51 0.138
(2 PLCS)
N
4.75 0.187
(2 PLCS)
2
3
4
5
Trim
+Vo
No Pin
Case
0V
+ Vo
No Pin
Case
6
On/Off
On/Off
7
Vin
Vin
8
GND
GND
Unit inch[mm]
TOLERANCE: ±0.020 inches UNLESS OTHERWISE SPECIFIED
Screw terminals: Degson Electronics terminal block part number
DG301-5.0-04P-12 or equivalent (4 pin, M2.5 screw) 5.0 mm spacing
*DIN rail mounting kit available (part # STK-DIN)
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CUI Inc │ SERIES: VYB20W-T │ DESCRIPTION: DC-DC CONVERTER
date 08/29/2012 │ page 5 of 6
APPLICATION NOTES
Requirement on Output Load
In order to ensure the product operates efficiently and reliably, make sure the specified range of input voltage is not exceeded and the
minimum output load is not less than 10% load. If the actual load is less than the specified minimum load, the output ripple may
increase sharply while its efficiency and reliability will reduce greatly. If the actual output power is very small, please add an
appropriate resistor as extra loading.
2.
Recommended Circuit
The VYB20W series has been tested according to the following recommended testing circuit. This series should be tested under load.
(see Figure 1)
Single Output
DC
DC
+Vo
C out
C in
0V
G ND
DC
DC
U
Cin
Cout
0V
C out
GND
N
Figure 1
Dual Output
Vin
+Vo
Vin
ED
1.
-Vo
If you want to further decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low ESR. If
the capacitance is too big, a startup problem might arise. The maximum allowable capacitance to ensure safe and reliable operation is
listed in Table 1.
Table 1
Cout
(μF)
Cin
(μF)
Dual Vout
(Vdc)
Cout
(μF)
TI
Single Vout
(Vdc)
Cin
(μF)
3.3
470
100
--
--
--
5
470
100
±5
±220
100
12
220
100
±12
±100
100
15
220
100
±15
±100
100
24
100
100
--
--
--
O
N
3. Trim Application And Trim Resistance (Single Output Models)
Formula for trim resistance
IS
C
Application circuit for TRIM (Part in broken line is the interior of models)
RT
R1
R3
Trim
V ref
D
Trimup
Vref
R1
Vo’-Vref
down: R T =
aR1
-R3
R 1-a
a=
Vo’-Vref
R2
Vref
R T: Trim resistance
R3
Trim
a: User-defined parameter, no actual meaning.
Vo’: Trim up/down voltage.
RT
R2
0V
a=
Note: Value for R1, R2, R3, and Vref refer to the following table.
R1
R2
aR2
-R3
R 2-a
+Vo
+Vo
V ref
up: R =
Vo
3.3 (Vdc)
5 (Vdc)
12 (Vdc)
15 (Vdc)
24 (Vdc)
Resistance
0V
R1 (KΩ)
4.801
2.883
10.971
14.497
24.872
Trimdown
R2 (KΩ)
2.863
2.864
2.864
2.864
2.864
R3 (KΩ)
15
10
17.8
17.8
20
Vref (V)
1.24
2.5
2.5
2.5
2.5
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CUI Inc │ SERIES: VYB20W-T │ DESCRIPTION: DC-DC CONVERTER
date 08/29/2012 │ page 6 of 6
REVISION HISTORY
description
date
1.0
initial release
08/08/2011
1.01
V-Infinity branding removed
ED
rev.
08/29/2012
D
IS
C
O
N
TI
N
U
The revision history provided is for informational purposes only and is believed to be accurate.
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800.275.4899
Fax 503.612.2383
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