4.1 Output voltage trimming for DBS/CDS
4.2 Remote ON/OFF circuit for DBS/CDS
4.3 Current source operation for DBS/CDS
4.4 O.C.P. (Over Current Protection) point adjust. for DBS/CDS
4.5 Inrush current limiting for CBS
4.6 Surge protection circuit
4. Application Circuits
Adjusting method by applying external voltage.
By applying the voltage to TRM pin, output voltage can be adjusted.
Output voltage Vo[V] = External voltage Vi[V] x Rated output voltage[V]
Fig.4.1.1 is basic connection of output voltage control. Fig.4.1.2 is output voltage characteristic
of the trimming circuit.
If output voltage is trimmed down
below 60% of the rated output voltage,
ripple and noise will increase
occasionally and/or over shoot occurs
when start-up. External filter attached
to the output is effective to avoid over
shoot when start-up.
2.1 Pin configuration
4.1 Output voltage triming for DBS/CDS
In connection as shown in Fig.4.1.1, output voltage can not reach zero completely made. In case
of 12V output module, it remains approximately 0.1-0.2V.
The characteristics can be improved by connecting AUX and CB, and connecting TRM and -S as
shown in Fig.4.1.3.
(enlarge the A)
(1)Remote ON/OFF circuit at output side in series and parallel operation
Please refer to item 1.7 and 3.7 for a basic circuit structure.
Remote ON/OFF circuit (RC2, RC3) is isolated from input and output circuit.
Therefore, the modules can be controlled by easy connections.
When auxiliary power source (AUX pin) is available for Remote ON/OFF by connecting the
modules as shown in Fig.4.2.1 and Fig.4.2.2.
The maximum operative number of units is 3 in series operation.
Remote ON/OFF of
Remote ON/OFF of