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RT9607 Datasheet(PDF) 13 Page - Richtek Technology Corporation

Part # RT9607
Description  Dual Channel Synchronous-Rectified Buck MOSFET Driver
PDF  15 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9607 Datasheet(HTML) 13 Page - Richtek Technology Corporation

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RT9607/A
13
DS9607/A-07 April 2011
www.richtek.com
Figure 2. Two- Phase Synchronous-Buck Converter Circuit
determined by following constraints.
In practice, a low value capacitor CB will lead the overcharging that could damage the IC. Therefore to minimize the risk
of overcharging and reducing the ripple on VCB, the bootstrap capacitor should not be smaller than 0.1
μF, and the larger
the better. In general design, using 1
μF can provide better performance. At least one low-ESR capacitor should be used
to provide good local de-coupling. Here, to adopt either a ceramic or tantalum capacitor is suitable.
Vin
C
B
V
CB
+
-
BOOT1
PVCC
PVCC
UGATE1
PHASE1
LGATE1
PGND
Figure 3. Part of Bootstrap Circuit of RT9607/A
BOOT1
UGATE1
PHASE1
LGATE1
VCC
PVCC
PWM1
PWM2
RT9607/A
11
14
5
1
2
4
13
12
UGATE2
PHASE2
LGATE2
BOOT2
GND
PGND
10
1uF
12V
1uF
PHB83N03LT
PHB95N03LT
2uH
1uF
1000uF
1.2uH
12V
7
8
9
PHB83N03LT
PHB95N03LT
2uH
1uF
1000uF
1uF
V
CORE
1500uF
1500uF
3
6
L1
C1
L2
C5
C6
Q3
Q4
L3
C3
C4
Q2
Q1
C2
Cb1
D1
D2
Cb2
R1
C7
PWM1
PWM2
10
V
IN



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