RT9619 查看數據表（PDF） - Richtek Technology

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RT9619

Synchronous-Rectified Buck MOSFET Drivers

Richtek Technology 

RT9619/A

Functional Pin Description

Pin No. Pin Name

Pin Function

1 BOOT

Floating bootstrap supply pin for upper gate drive.

2 PWM

Input PWM signal for controlling the driver.

3 NC

No Connection Pin.

4 VCC

+12V Supply Voltage.

5 LGATE

Lower Gate Drive Output. Connected to gate of low-side power N-Channel MOSFET.

6 PGND

Common Ground.

7 PHASE

Connected this pin to the source of the high-side MOSFET and the drain of the low-side

MOSFET.

8 UGATE

Upper Gate Drive Output. Connected to gate of high-side power N-Channel MOSFET.

Function Block Diagram

VCC

PWM

Internal

5V

R

R

POR

Tri-State

Detect

Shoot-Through

Protection

Turn off Detect

Shoot-Through

Protection

VCC

BOOT

UGATE

PHASE

LGATE

PGND

Timing Diagram

PWM

LGATE

tpdlLGATE

90%

2V

UGATE

2V

tpdhUGATE

DS9619/A-06 April 2011

tpdlUGATE

2V

90%

2V

tpdhLGATE

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