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VYB20W-Q24-D12

P1-P3P4-P6
cui.com
CUI Inc │ SERIES: VYB20W │ DESCRIPTION: DC-DC CONVERTER date 08/29/2012 │ page 4 of 6
MECHANICAL
parameter conditions/description min typ max units
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
with heat sink
40
55
g
g
0.400
7.62
0.300
5.08
0.200
10.16 0.400
10.16
20.32 0.800
TOLERANCE:
±0.3mm UNLESS OTHERWISE
SPECIFIED
0.441
4.10
11.20
0.465
0.161
0.138
11.80
3.50
1.00 0.039
1
65
4
2
3
24.90 0.980
30.00 1.181
MAX
22.50 0.886
MAX
25.40 1.000
50.80 2.000
17.50 0.689
CLAMP
THERMAL PAD
HEATSINK
1
2
6
3
5
4
∅1.20 [0.047]
2.54[0.100]
20.32[0.800]
10.16[0.400]5.08[0.200]
2.54[0.100]
20.32[0.800]
50.80 [2.000 ]
-0.00
+0.80
-0.000
+0.031
25.40 [1.000 ]
-0.00
+0.80
-0.000
+0.031
Pin
1
2
3
4
5
6
Single
GND
Vin
+Vo
Trim
0V
On/Off
Dual
GND
Vin
+Vo
0V
-Vo
On/Off
PIN CONNECTIONS
*Pin 6 added for optional Remote on/off
Pin section tolerances:±0.10mm[±0.004inch]
General tolerances:±0.25mm[±0.010inch]
MECHANICAL DRAWING
RECOMMENDED FOOTPRINT (TOP VIEW)
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cui.com
CUI Inc │ SERIES: VYB20W │ DESCRIPTION: DC-DC CONVERTER date 08/29/2012 │ page 5 of 6
1. Requirement on Output Load
In order to ensure the product operates effi ciently and reliably, make sure the specifi ed 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 specifi ed minimum load, the output ripple may
increase sharply while its effi ciency 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)
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.
Vin
GND
+V o
0V
Cin
Cout
DC DC
-Vo
Cout
Single Output Dual Output
Vin
GND
+V o
0V
DC DC
Cin
Cout
Single Vout
(Vdc)
Cout
(μF)
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 -- -- --
Table 1
Figure 1
APPLICATION NOTES
Application circuit for TRIM (Part in broken line is the interior of models)
0V
R2
R1
R3
Vre f
RT
Trim
+V
o
0V
R2
R1
R3
Vre f
RT
Trim
+V
o
Trimup
Trimdown
Formula for trim resistance
up:
a=
Vre
f
Vo’-Vref
R
1
R=
a
R
2
R-a
2
-R
3
down:
a=
Vre
f
Vo’-Vref
R
2
R=
T
aR
1
R-a
1
-R
3
Note: Value for R1, R2, R3, and Vref refer to the following table.
R
T
: Trim resistance
a: User-defined parameter, no actual meaning.
Vo’: Trim up/down voltage.
Vo
Resistance
3.3 (Vdc) 5 (Vdc) 12 (Vdc) 15 (Vdc)
R1 (KΩ) 4.801 2.883 10.971 14.49 7
R2 (KΩ) 2.863 2.864 2.864 2.864
R3 (KΩ) 15 10 17.8 17.8
Vref (V) 1.24 2.5 2.5 2.5
24 (Vdc)
24.872
2.864
20
2.5
3. Trim Application and Trim Resistance (Single Output Models)
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CUI Inc │ SERIES: VYB20W │ DESCRIPTION: DC-DC CONVERTER date 08/29/2012 │ page 6 of 6
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
cui.com
techsupport@cui.com
rev. description date
1.0 initial release 08/09/2011
1.01 V-Infi nity branding removed 08/29/2012
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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P1-P3P4-P6

VYB20W-Q24-D12

Mfr. #:
Buy VYB20W-Q24-D12
Manufacturer:
Description:
DC DC CONVERTER +/-12V 20W
Lifecycle:
New from this manufacturer.
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