To ensure this module can operate efficiently and reliably, During operation, the minimum output load is not less than 10% of the full
load, and that this product should never be operated under no load! If the actual output power is very small, please connect a
resistor with proper resistance at the output end in parallel to increase the load, or use our company’s products with a lower rated
output power.
2.
Overload Protection
Under normal operating conditions, the output circuit of these products has no protection against overload. The simplest method is to
connect a self-recovery fuse in series at the input end or add a circuit breaker to the circuit.
Vin
(Vdc)
24
48
Fuse (slow-blow type)
(mA)
250
150
3.
Recommended Circuit
If you want to further decrease the input/output ripple, an “LC”
fi
ltering network may be connected to the input and output ends of
the DC/DC converter, see (Figure 1).
Vc
D1
Ic R
Figure 1
Vin
C1
GND
Lin
C2
2
3
1
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 see
(Table 1).
C1/C2
Lin
10 ~ 100
μF
4.7 ~ 120
μH
100
μF
4.
O
Input Current(A)
CTRL Terminal
When open or high impedance, the converter work well; When this pin is ‘high’; the converter shutdown; It should be note that the
input current should between 5~10 mA,exceeding the maximum 20 mA will cause permanence damage to the converter. The value of
Vc not limited and desirable 5 Vdc, 12 Vdc, or directly with Vin. The value of R can be derived as follows:
IS
C
General: Ip
≤1.4*Iin-max
6.
5.
Input Current
Nominal input voltage range. The input current of the power supply must be sufficient to the startup current (Ip) of the DC-DC
module.
Ip
D
No parallel connection or plug and play
Table 1
N
TI
9
Cout
R=
V
C
-V
D
-1.0
I
C
Input Voltage (V)
cui.com
N
U
6
+Vo
Cout
0V
Inp ut Voltage
Ra nge
ED
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VWQBS2-SIP
│
DESCRIPTION:
DC-DC CONVERTER
date
09/10/2012
│
page
5 of 5
REVISION HISTORY
rev.
1.0
1.01
1.02
description
initial release
new template applied
V-Infinity branding removed
date
The revision history provided is for informational purposes only and is believed to be accurate.
D
IS
C
O
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
