AT1395

Preliminary Product Information

5-Channel DC-DC Converter for DSC

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

12

＊

Output block

The output block is the totem pole configuration, which could drive external

MOSFET or transistor. It can be drive the external N-MOSFET by force the SEL

to High, and it can be drive the external P-MOSFET by force the SEL to LOW.

2. Channel Control Function

The channels are turned on and turned off depending on the voltage levels at the

CTL, CTL12, CTL3, CTL4, CTL5, and CTL6. Described as follow.

CTL

L

H

CTL1

X

H

Z

Z

Z

Z

CTL2

X

Z

H

Z

Z

Z

CTL3

X

Z

Z

H

Z

Z

CTL4

X

Z

Z

Z

H

Z

CTL5

X

ZZZZ

H

CH1

ON

OFF

OFF

OFF

OFF

CH2

OFF

ON

OFF

OFF

OFF

CH3

OFF

OFF

ON

OFF

OFF

CH4

OFF

OFF

OFF

ON

OFF

CH5

OFF

OFF

OFF

OFF

OFF

ON

X : Don’t care

Z: Low or Floating

3. Protective Functions

＊

Short circuit protection and timer latch

The short circuit detection comparator in each channel detects the output voltage

level of power converter.

When the output voltage falls below the short

detection level, there is a constant current bias charging the external capacitor

C

about 0.7V then disable the IC. It could reset the actuated protection by restart

the power source or pull CTL from low to high.