rev.
page
date
3 of 3
09/2009
PART NUMBER:
VWRBS2
DESCRIPTION:
dc-dc converter
Application Notes:
- All of the VWRBS2-SIP Series have been tested
according to the following recommended testing
circuit before leaving the factory. This series should
be tested under load(Figure 1). If you want to further
decrease the input/output ripple, you can increase
capacitance properly or choose capacitors with
low ESR. However, the capacitance should not be too
high(Table 2).
- 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
(Figure 2)
Input Current(A)
Ip
Input Voltage
Range
External Capacitor Table
Single
Vout(VDC)
3.3
5
9
12
15
24
Cout(uF)
2200
1000
820
680
560
470
Dual
Vout(VDC)
-
±5
±9
±12
±15
-
Cout(uF)
-
±560
±470
±330
±270
-
Cs (uF)
-
47
47
47
47
-
Input Voltage (V)
- Output Load
In order to ensure the product operates
efficiently and reliably, make sure the specified range
of input voltage is not exceeded.
No parallel connection or plug and play.
Table 2
Temperature Derating Graph
- NC Terminals
Unless otherwise specified, NC terminals of all series
are used for converter's interior circuit
connection, and are not allowed connection of any
external circuit.;
Operating Temp.(
C
)
-
Remote on/off control (see figure 1)
ON:
When control pin (CTRL pin 3) open or Ic
<
0.5mA, converter will have normal output.
OFF:
With a 3-10mA input current (Ic) to pin 3, output will be disabled. Under no conditions
should input current (Ic) exceed 20mA. The Value of R in Figure 1 can be derived as follows:
R= Vc - Vd - 0.65V
Ic
Vc= Voltage at control input
Vd= Diode (D1) voltage drop (.7V voltage drop typical )
Ic= Input Current (5mA recommended disable current)
example 1
: Logic circuit — Apply 5V TTL logic signal on Vc to disable output
R=
5V - 0.7V - 0.65V
= 730
Ω
.005A
Choose 720Ω resistor
example 2
: Short Vin to Vc — Apply 12V on Vc to disable output
R= 12V - 0.7V - 0.65V = 2130
Ω
.005A
Choose 2K
Ω
resistor
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2383
www.v-infinity.com
CUI [ CUI INC ]
