iru3046 International Rectifier Corp., iru3046 Datasheet - Page 13

• Manufacturer Part Number: iru3046
• Description: Dual Synchronous Pwm Controller With Current Sharing Circuitry And Ldo Controller
• Manufacturer: International Rectifier Corp.

TYPICAL APPLICATION
Rev. 1.9
09/27/02
PGood
@ 2A
3.3V
12V
2.5V
5V
47uF
33uF
C1
C6
47uF
C7
Figure 10 - Typical application for IRU3046 configured as two independent controllers.
1uF
C5
1uH
L1
Q1
IRLR2703
R1
1K
1uF
2200pF
R2
1K
C3
1500pF
400
370
340
310
280
250
220
190
C8
C9
Figure 11 - Switching frequency per phase vs. Rt
0
1uF
22K
25K
C10
0.1uF
R3
R4
C4
Switching Frequency vs. Rt
100
V
Rt
Sync
Comp1
Vcc
VccLDO
V
Fb3
Comp2
PGood
SS
SEN33
OUT3
V
C L
IRU3046
200
VcH1
www.irf.com
U1
Gnd
VcH2
HDrv2
HDrv1
LDrv1
LDrv2
300
PGnd
Rt
V
Fb1
Vp2
Fb2
R E F
33uF
C2
C13
1uF
400
500
Q4
IRF7457
Q3
IRF7457
Q5
IRF7457
Q2
IRF7460
L2
1uH
D1
C14
2x 47uF
C17
2x 150uF
600
C11
0.1uF
3.9uH
4.7uH
L4
L3
D2
IRU3046
R7
442
R5
1K
R9
1K
R8
1K
V
C16
2x 150uF
C12
2x 150uF
1.8V
@ 8A
2.5V
@ 8A
13