INNOLINE
DC/DC-Converter
Standard Application Circuit
R-5xxxPA_DA
Series
11
Vin
TTL
OFF
ON
Com
1µF
(Optional)
2, 3, 4
C1
1
R-52XX
R-53XX
R-54XX
R-55XX
5, 6, 7,8
(Adjust down)
R1
9, 10
Vout
C2 (Req'd)
12
(Adjust up)
Q1
R2
100µF/10V
or 220µF/10V
(see Note 1)
Add a blocking diode to
Vout if current can flow
backwards into the out-
put, as this can damage
the converter..
Com
Parallel Application Circuit
The R-52xx, R-53xx, R-54xx series can be used in parallel to upgrade the output current capacity for
the same output voltage.
For example, the R-543.3PA can parallel up with another R-554.3PA to give up to 8 amps or with the
R-533.3PA or R-523.3PA types to give output currents of up to 7 Amps or 6 Amps.
The R-55xx series cannot be paralleled.
Vin
ON/OFF
Control
Com
C2-2
100µF/10V
(REQ`D)
Q1
C1
100µF/25V
(REQ`D)
1
2
3
4
U1
5
6
7
12
11
10
8 9
C2-1
100µF/10V
(REQ`D)
Vout
Com
4
3
2
1
5
6
7
8
U2
9
10
11
12
must be connected
together
Component side
Solder side
Com
+Vin
12
C1
1
U1
C2-1
1
12 U1
1
Keep 2mm to 5mm distance
between both converters
12 U2
12
C2-2
+Vout
Sense
Com
1
U2
To Load
www.recom-international.com
27-March-2007
157
RECOM [ RECOM INTERNATIONAL POWER ]
