April 05 REVISION 02

SHEET 11 OF 15

Technical Reference Note

Ultra Low Profile

AUD 10W Series

D) complex parallel and multiple (Sequence start-up): Two converters supplying the same output voltage for a

single load and another converter supplying the different output voltage for another load.

Figure 4

i) PO pins of the converters supplying the same output voltage are connected to the others and another PO pin of the

different output voltage converter is not connected.

ii) All three DC-DC converters, which are connected to ALM pins, stop their operation when a single one is halted in

mode protected by LVP or OVP.

iii) LED is optionally connected to ALM pin for the notice of DC-DC converter stoppage.

-48V

+Vin

+Vout

-Vin

-Vout

PO

RC

ALM

Load

Fuse

SW1

GND

SW2

+Vin

+Vout

-Vin

-Vout

PO

RC

ALM

Load

Converter No.1

Converter No.2

SW1 Close : Halt DC-DC converter No.1 and 2

SW2 Close : Halt DC-DC converter No.3

Converter No.3

+Vin

+Vout

-Vin

-Vout

PO

RC

ALM