Datasheet

For more information, please visit the product page.
date
08/29/2012
page
1 of 6
SERIES: VYB20W │ DESCRIPTION: DC-DC CONVERTER
up to 20W output
industry standard pinout
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
9 ~ 36
VYB20W-Q24-S5
9 ~ 36
VYB20W-Q24-S12
9 ~ 36
9 ~ 36
9 ~ 36
VYB20W-Q24-D5
VYB20W-Q24-D12
ripple1
noise1
efficiency
max
(mA)
max
(W)
max
(mVp-p)
max
(mVp-p)
typ
(%)
500
5,000
16.5
150
150
83
5
400
4,000
20
150
150
86
12
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
O
VYB20W-Q24-D15
VYB20W-Q48-S3
output
power
N
VYB20W-Q24-S15
VYB20W-Q24-S24
output
current
TI
MODEL
N
RoHS
500
VYB20W-Q48-D5
18 ~ 75
±5
±200
±2000
20
50
100
85
VYB20W-Q48-D12
18 ~ 75
±12
±83
±833
20
50
100
87
VYB20W-Q48-D15
18 ~ 75
±15
±67
±667
20
50
100
88
VYB20W-Q48-S5
VYB20W-Q48-S12
VYB20W-Q48-S15
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
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
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 │ 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
under voltage lockout
all models
all models
single output models
dual output models
all models
power
power
power
power
power
Remote on/off1
all models
single output models
dual output models
module off
module on (or open circuit)
module on (or open circuit)
filter
single output models, LC
dual output models, PI type
Vdc
Vdc
Vdc
Vdc
Vdc
0
3.5
3.5
1.2
12
12
Vdc
Vdc
Vdc
typ
max
units
U
1. The on/off pin voltage is referenced to GND
OUTPUT
parameter
9.0
17.8
8.0
7.8
16.0
conditions/description
N
Notes:
up 24 V input
up 48 V input
down 24 V input
down 24 V input
down 48 V input
ms
ED
parameter
min
measured from low line to high line
±0.2
±0.5
%
measured from 10% to full load
±0.5
±1
%
TI
line regulation
load regulation
voltage accuracy
refer to recommended circuit
±1
±3
%
transient recovery time
25% step load charge
200
500
μs
transient peak deviation
25% rated load
dual output models
N
cross regulation
single output models
switching frequency
100% load, input voltage range
PROTECTIONS
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
adjustability
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 │ 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 │ DESCRIPTION: DC-DC CONVERTER
date 08/29/2012 │ page 4 of 6
MECHANICAL
conditions/description
dimensions
2.00 x 1.00 x 0.44 inch (50.8 x 25.4 x 11.2mm)
case material
nickel-coated copper (six-sided)
weight
min
typ
max
units
ED
parameter
40
55
with heat sink
MECHANICAL DRAWING
g
g
4
2
3.50 0.138
5.08[0.200]
4.10 0.161
20.32 0.800
3
7.62 0.300
2
4
5.08 0.200
6
24.90 0.980
5
O
THERMAL PAD
HEATSINK
IS
C
D
22.50 0.886
MAX
PIN CONNECTIONS
Pin
S ingle
Dual
1
2
3
4
5
GND
Vin
+ Vo
Trim
0V
GND
Vin
+ Vo
0V
-Vo
6
On/Off
On/Off
*Pin 6 added for optional Remote on/off
CLAMP
17.50 0.689
50.80 2.000
2.54[0.100]
20.32[0.800]
80
+0. 031
50.80 +0.
-0.00 [2.000 -0.000 ]
Pin section tolerances:±0.10m m[±0.004inch]
General tolerances:±0.25m m [±0.010inch]
10.16 0.400
25.40 1.000
3
10.16 0.400
N
1
TI
1.00 0.039
+0.031
25.40+0.80
-0.00 [1.000 -0.000 ]
1
2.54[0.100]
5
20.32[0.800]
6
N
11.80 0.465
∅1.20 [0.047]
U
11.20 0.441
10.16[0.400]
RECOMMENDED FOOTPRINT (TOP VIEW)
TOLERANCE:
±0.3mm UNLESS OTHERWISE
SPECIFIED
30.00 1.181
MAX
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CUI Inc │ SERIES: VYB20W │ 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.
Single Vout
(Vdc)
Cin
(μF)
Dual Vout
(Vdc)
Cout
(μF)
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
--
--
--
TI
Table 1
Cout
(μF)
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 │ DESCRIPTION: DC-DC CONVERTER
date 08/29/2012 │ page 6 of 6
REVISION HISTORY
description
date
1.0
initial release
08/09/2011
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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