RT9618 Просмотр технического описания (PDF) - Richtek Technology
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RT9618 Datasheet PDF : 12 Pages
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RT9618/A
Typical Application Circuit
ATX_12V
L1
2.2uH
VIN
C8
C9
C10
C11
C12
C13 C14
10uF 10uF 1000uF
1000uF 1000uF 10uF 10uF
ATX_12V
D1
R2
1
C2
1uF
1
R1
BOOT
R3
10
4 VCC
8
UGATE
2.2
C1
1uF
RT9618/A
+5V 3 OD
PHASE 7
R4
PWM 2 PWM
LGATE 5
0
PGND
6
Q1
L2
1uH
R5
2.2
Q2
C3
3.3nF
VCORE
C4
C5
C6
C7
2200uF 2200uF 10uF 10uF
Functional Pin Description
Pin No.
Pin Name
Pin Function
RT9618/A□S RT9618/A□QW
1
1
BOOT
Floating bootstrap supply pin for upper gate drive.
2
2
PWM
Input PWM signal for controlling the driver.
Output Disable. When low, both UGATE and LGATE are driven low
3
3
OD
and the normal operation is disabled.
4
4
VCC
+12V Supply Voltage.
Lower Gate Drive Output. Connected to gate of low-side power
5
5
L GATE
N-MOSFET.
6
6
PGND
Common Ground.
Connected this pin to the source of the high-side MOSFET and the
7
7
PHASE
drain of the low-side MOSFET.
Upper Gate Drive Output. Connected to gate of high-side power
8
8
U GA TE
N-MOSFET.
--
9 (Exposed Pad) GND
The exposed pad must be soldered to a large PCB and connected
to GND for maximum power dissipation.
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2
DS9618/A-06 April 2011
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