SC4201
POWER MANAGEMENT
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.
+3 to 6V
VDD
Ph A
L
PWM
sync
~ Fsw
SYNC
Ph B
PWM
L
sync
~ Fsw
RT
Fsw control
Ph C
PWM
L
sync
~ Fsw
Time Delay
(optional)
VDD
+3 to 6V
SYNC
Vout
C
RT
Power Section of choice
Ph A
Ph B
Ph C
GND
Ph D
SC4201 - A
L
PWM
sync
~ Fsw
optional 3 or 2/4 Phases
GND
Ph D
SC4201 - B
Figure 4
2002 Semtech Corp.
7
www.semtech.com