APU3046 Datasheet, PDF (13/19 Pages) Advanced Power Electronics Corp. – DUAL SYNCHRONOUS PWM CONTROLLER WITH

TYPICAL APPLICATION
12V
5V
C1
33uF
3.3V
C6
47uF
2.5V
@ 2A
C7
47uF
PGood
L1
1uH
C3
C4
1uF
1uF
C5
1uF
Q1
IRLR2703
R1
1K
R2
1K
C8
2200pF
R3
22K
R4
C9 _25K
1500pF
C10
0.1uF
C2
33uF
VCL
Vcc
VcH1
VcH2
HDrv1
VccLDO
VSEN33
LDrv1
VOUT3
PGnd
Fb3
Rt
Sync
U1
APU3046 ^Fb1
VREF
Vp2
HDrv2
Comp1
LDrv2
C13
1uF
1N4148
1N4148
Comp2
PGood
SS
Gnd
Fb2
APU3046
D1
L2
1uH
D2
C11
0.1uF
C14
2x 47uF
Q2
IRF7460
Q3
IRF7457
L3
4.7uH
1.8V
@ 8A
C16
2x 150uF
R7
442V
C17
2x 150uF
Q4
L4
IRF7457
Q5
IRF7457
3.9uH
R8
1K
2.5V
@ 8A
C12
2x 150uF
R5
1K
R9
1K
Figure 10 - Typical application for APU3046 configured as two independent controllers.
Switching Frequency vs. Rt
400
370
340
310
280
250
220
190
0
100 200 300 400 500 600
Rt
Figure 11 - Switching frequency per phase vs. Rt
13/18