Ver.2010/09/03　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

　　　　　　　　　

NJW4303

Hall Element-PWM Type 3-Phase Motor Control IC

■ PACKAGE OUTLINE

NJW4303V

■ BLOCK DIAGLAM

■ GENERAL DESCRIPTION

The NJW4303 is a 3-Phase Brushless DC Motor Control

pre-driver IC with PWM control. It generates the most optimal

current flow patterns by receiving rotor magnetic pole detection

signals from hall elements of 3-phase brushless motor.

Operational voltage range for the IC has margin as 9.0V to 35V

(maximum voltage of 40V), and it fits for a 12V/24V power supply.

It is possible to put practical use such as speed control by

internal oscillation circuit, and torque limiter control by current

sensory circuit. With NJW4303, high reliability of various motor

drive controls can be realized by a variety of function and a

substantial protection circuit.

■ FEATURE

▪ Supply Voltage

: 9.0V ~ 35V

▪ PWM Pre Driver

: Upper = Pch / Lower = Nch

▪ PWM Control Circuit

▪ Forward / Reverse Detection

: Changeable while Roating

▪ PWM Oscillation Circuit

: Setting by External Capacitor

▪ Protection Circuit

: ILimit, UVLO, TSD, LD

▪ Soft Start Function

▪ Short Brake Function

▪ ON/OFF Function

: Stop with S/S Pin

▪ 120º / 60º Phase Difference Change Function

▪ Multi FG Output

: 2 bit Input Change Type

▪ Controllable Dead Time Settings

▪ Package

: SSOP-32

H1+

H2+

H3+

FRC

VREF

OSC

VERR

GND

ILIMIT

WL

VL

UL

WH

VH

UH

FR

BR

FG

H1-

H2-

H3-

S/S

N1

N2

DEC

VCC

N

N

S

S

3Phase Motor

H

H

H

FG-OUT

+

VM

GND

+

Lowpass Filter

+

+

-

VREF

UVLO

Saw

Oscillator

+

-

PWM Logic

Lock

Detect

TSD

+

-

+

-

+

-

Dead

Time

Rotor

Position

Decode