7

 2002 Semtech Corp.

www.semtech.com

POWER MANAGEMENT

SC4201

L

L

C

L

L

Ph A

Ph B

Ph C

Ph D

SC4201 - A

V

SYNC

RT

GND

DD

Vout

+3 to 6V

optional 3 or 2/4 Phases

Fsw control

PWM

Fsw

sync

~

PWM

Fsw

sync

~

PWM

Fsw

sync

~

PWM

Fsw

sync

~

Ph A

Ph B

Ph C

Ph D

SC4201 - B

V

SYNC

RT

GND

DD

+3 to 6V

Power Section of choice

Time Delay

(optional)

Application Information (Cont.)

Diagram in Figure 4 demonstrates a synchronous operation of two (or more) SC4201 controllers. If the “time

delay” circuit is to be employed then 6-phase, 8-phase and other configurations become possible.

Figure 4