RT9605B 데이터 시트보기 (PDF) - Richtek Technology
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RT9605B Datasheet PDF : 13 Pages
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RT9605B
Typical Application Circuit
PHASE2
L1
0.5µH
12V
1µH
R19 2.2
C16
3.3µF
VIN
Q3
Q1
Q2
C1
33pF
Optional
R2 C2
C8
1000µF
5VSB
C4
4.7µF
C9
1µF
C10 to C13
1500µF x 4
D1
C15
C14
1µF
R18
0
1µF
12V
R20
0
17 19 21 20 3
R1
15k
C3
10nF
R3 3k
5 3 16 13
VID5
VID0
VID1
VID2
VID3
VID4
R4 110k
R5 56k
R6 27k
R7 13k
R8 6.8k
R9 3.3k
R10 5.1k
RDROOP 6 PI
2 DACQ
R11
1.8k
1 DACFB
9 PGOOD
R12
10k
RT8800
GND
3.3V
12V
R13 27k 4
R14
3k
78
R15
16k
PWM3 15
PWM2 14
ISP3 10
ISP2 11
R16
Optional
C5 1µF
12 Optional R17
C6
1µF
R17
Optional
430
Optional
RICOMMON1
C7
RICOMMON2
1µF
VCORE
16 BOOT2
7 PWM3
PHASE3
5 PWM2
4 PWM1
2 BOOT1
R
RT9605B
GND
R25
LGATE3 14 0
PVCC3 15
C21
1µF
PHASE3 11 12V
R26
UGATE3 10
0
BOOT3
9
C22
D3
1µF
Q7 PHASE3
C23
3.3nF
Q8
R27
2.2
L2
0.5µH
Q9
VIN
PHASE2
R
PHASE1
R
1
C17
1µF
D2
24 22 23 8 R23 10
R21
0
12V C18
1µF
R22
0 C19 1µF
Q4
Q5
VIN
R24
2.2
C20
Q6
3.3nF
5VSB
PHASE1
L3
0.5µH
C24 to C35
1000µF x 12
C36 to C39
10µF x 4
VCORE
Functional Pin Description
UGATE1 (Pin 1), UGATE2 (Pin 17), UGATE3 (Pin 10)
Upper Gate Drive Output. Should be connected to the
upper MOSFET gate.
VDD (Pin 8)
Supply Input. Connect to +5V stand-by power. Place a
bypass capacitor between this pin and GND.
BOOT1 (Pin 2), BOOT2 (Pin 16), BOOT3 (Pin 9)
Floating bootstrap supply pin for the upper gate drive.
Connect the bootstrap capacitor between this pin and the
PHASE pin. The bootstrap capacitor provides the charge
to turn on the upper MOSFET.
NC (Pin 3)
No connected.
PHASE1 (Pin 24), PHASE2 (Pin 19), PHASE3 (Pin 11)
Upper driver return. Should be connected to the common
node of upper and lower MOSFETs. The PHASE voltage
is monitored for adaptive shoot-through protection.
LGATE1 (Pin 23), LGATE2 (Pin 20), LGATE3 (Pin 14)
Lower Gate Drive Output. Should be connected to the lower
MOSFET gate.
PWM1 (Pin 4), PWM2 (Pin 5), PWM3 (Pin 7)
PVCC1 (Pin 22), PVCC2 (Pin 21), PVCC3 (Pin 15)
PWM input control signal. Connect this pin to the PWM
output of the controller. If the PWM signal enters and
remains within the shutdown window, are both UGATE
and LGATE are drived low, disabling the output MOSFETs.
GND (Pin 6, 12, 13, 18 )
Chip power ground.
Supply Input. Connect to +12V supply. Place a bypass
capacitor between this pin and PGND.
Exposed Pad
Exposed pad should be soldered to PCB board and
connected to GND.
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DS9605B-03 March 2011
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