RT8402

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is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS8402-00

January

2017

2

Simplified Application Circuit

RT8402

L1

Bootstrap diode

D2

R4

D1

Q1

R2A

C1

R1

R2B

DIM

VCC

SENSE

GATE

SGND

VC

C3

RG

C2

R3

ZD1

Bridge Rectifier

Line

Neutrl

EC1

Functional Pin Description

Pin No.

Pin Name

Pin Function

1

VCC

Supply voltage input of the chip. For good bypass, a ceramic capacitor near the

VCC pin is required.

2

SGND

Ground of the chip.

3

GATE

Gate driver for external MOSFET.

4

SENSE

LED current sense input.

5

VC

Close loop compensation node.

6

DIM

Internal dimming function.