Rev. 1.30

2

March 25, 2016

HT7A6003

Block Diagram

Pin Assignment

32V

UVLO

14V / 8V

Internal

Bias & Vref

Slop

Compensation

PWM

2R

R

OCP

1V

LEB

350nS

SCP

S

R

Q

Driver

Stage

VREF

VCC

GD

GND

VCC

RT

COMP

CS

OVP

Frequency

Jitter

Green Mode

OSC

Soft-Start

Pin Description

Pin No.

Pin Name

Description

1

COMP

Voltage Feedback Pin. Connected to a Photo-Coupler for close-loop control.

2

N.C

No connection

3

CS

A voltage proportional to inductor current is connected to this input. The PWM generator

uses this voltage information to terminate the output switch conduction.

4

RT

The oscillator frequency is programmed by connecting a resistor RT between this pin and

ground. A maximum frequency of 500kHz is possible.

5

GND

Combined control circuitry and power ground.

6

GD

Power MOSFET gate driver output.

7

VCC

Positive Supply.

8

VREF

Reference output.

Absolute Maximum Ratings

SupplyVoltageVCC................................................................................................................................ -0.3V~30.0V

COMP,RT,CSPins................................................................................................................................... -0.3V~5.5V

JunctionTemperature.......................................................................................................................................... 150°C

OperatingAmbientTemperature............................................................................................................... -40°C~85°C

StorageTemperatureRange.................................................................................................................... -65°C~150°C

PackageThermalResistance(8-PinSOP)..................................................................................................... 160°C/W

ESDProtection:

HumanBodyModel......................................................................................................................................3kV

MachineModel...........................................................................................................................................200V

Note:Thesearestressratingsonly.Stressesexceedingtherangespecifiedunder“AbsoluteMaximumRatings”

maycausesubstantialdamagetothedevice.Functionaloperationofthisdeviceatotherconditionsbeyond

thoselistedinthespecificationisnotimpliedandprolongedexposuretoextremeconditionsmayaffect

devicereliability.

1

2

3

4

8

7

6

5

COMP

NC

CS

RT

VREF

VCC

GD

GND

HT7A6003

8 SOP-A