H6849 datasheet(2/13 Pages) HSMC

2 / 13 page

HI-SINCERITY

MICROELECTRONICS CORP.

Spec. No. : IC200804

Issued Date : 2008.09.19

Revised Date : 2009.07.14

Page No. : 2/13

H6849P, H6849S,H6849NF

HSMC Product Specification

Pin Assignment

Part Number

Description

H6849NF

SOT26, Pb-free,in T/R

H6849S

SOP-8, Pb-free in T/R

H6849P

DIP-8, Pb-free in Tube

Pin Connection (Top View)

Package

Function

Description

SOT-26

DIP-8

Pin6:

GATE Pin1: GATE

Totem-pole output to drive the external power MOSFET

which is internally clamped below 18V

Pin5: VDD Pin2: VDD

Power Supply The internal protection circuit disables

PWM output if VDD is over voltage..

Pin3: NC

NC Pin.

Pin4:

SENSE

Pin4:

SENSE

Current sense pin, a resistor connects to sense the

MOSFET current.

Pin3: RI

Pin5: RI

This pin is to program the switching frequency. By

connecting a resistor to ground to set the switching

frequency.

Pin6: NC

NC Pin

Pin1: FB

Pin7:FB

Voltage feedback pin.Output current of this pin could

controls the PWM duty cycle, If FB voltage exceeds the

threshold; the internal protection circuit disables PWM

output.

SOT-26

DIP -8(SOP-8)

Pin1: GND Pin8: GND GND Pin

Block Diagram

Simplified Internal Circuit Architecture

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