Rev. 1.00

2

August 14, 2015

HT7963

Block Diagram

OSC

VREF

OTP

Control

Logic

EA

PWM

Comparator

Pre-Driver

Slope

Compensation

COMP

CS

OVP

GND

Soft-start

DIM

DRV

0.1V

Dimming

Control

FB

VIN

GND

VIN

GND

clamped

to 13V

OVP

OVP

OSP

OSP

6V/8.5V

IDIM

OCP

IDIM

UVLO

0.5V

UVLO

OCP

LEB

1.2V

LED Short

LED Short

0.3V

1.938V

Pin Assignment

DIM

OVP

COMP

FB

VIN

DRV

GND

CS

HT7963

8 SOP-A

1

2

3

4

8

7

6

5

Pin Description

Pin Order

Name

Type

Pin Discription

1

VIN

P

Power Supply

2

DRV

O

Boost Converter Gate Drive Output

3

GND

G

Ground Terminal

4

CS

I

Boost Converter Current Sense Input

5

FB

I

LED Current Feedback Input

6

COMP

I/O

Boost Converter Loop Compensation

7

OVP

I

Over Voltage Protection Input – setup using resistor divider

8

DIM

I

External PWM Dimming Control / Enable Control

Absolute Maximum Ratings

Parameter

Value

Unit

VIN, DRV, CS, FB and OVP

-0.3 to 33

V

GND

+/-0.3

V

DIM and COMP

-0.3 to +7.0

V

Operating Temperature Range

-40 to +85

°C

Maximum Junction Temperature

+160

°C