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 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.
Recommended Circuit
All VWRBT2 converters have been tested according to the following recommended testing circuit before leaving the factory. This
series should be tested under load, never under no load (Figure 1).
Figure 1
2.
+Vin
Cin
+Vo
DC
DC
-Vo
-Vin
However, the capacitance of the output
fi
lter capacitor must be proper. If the capacitance is too big, a startup problem might arise.
For every channel of output, provided the safe and reliable operation is ensured, the greatest capacitance of its
fi
lter capacitor sees
(Table 1).
General:
Cin
Cout
12 V
24, 48 V
100
μF
10 ~ 47
μF
TI
5
9
12
15
10
μF
/ 100 mA
Table 1
3.
General: Ip
≤1.4*Iin-max
IS
C
4.
5.
Solderability
reflow soldering, 240°C max.
No parallel connection or plug and play
D
O
N
Input Current(A)
Input Current
While using unstable power source, please ensure the output voltage and ripple voltage do not excced indexes of the converter. The
preceding power source must be able to provide for converter sufficient starting current Ip.
Ip
Input Voltage (V)
cui.com
N
U
Vout
(Vdc)
3.3
Cout
(μF)
2,200
1,000
680
470
330
Inp ut Voltage
Ra nge
ED
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VWRBT2
│
DESCRIPTION:
DC-DC CONVERTER
date
11/01/2012
│
page
5 of 5
REVISION HISTORY
rev.
1.0
1.01
1.02
1.03
1.04
description
initial release
updated to new template
updated application notes
V-Infinity branding removed
added TR package option
date
The revision history provided is for informational purposes only and is believed to be accurate.
D
IS
C
O
N
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
techsupport@cui.com
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
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