NJW4303 Hall Element-PWM Type 3-Phase Motor Control IC ■ 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. ■ PACKAGE OUTLINE NJW4303V ■ BLOCK DIAGLAM VM + R FG FG-OUT FG CVREF CVCC VREF + + GND VCC ■ 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 VREF UVLO UH TSD S/S 3Phase Motor DEC N VH N1 S N2 H1+ H H1H2+ H H2H3+ H H3- Rotor Position Decode + - WH + UL + - FRC VL FR CF RC Dead Time BR OSC C OSC VERR CVERR Saw Oscillator WL PWM Logic + - + - GND S N ILIMIT Lock Detect Lowpass Filter Cct Ver.2010/09/03