New Japan RadioSemiconductor Product Information

Part Number NJW4303

FUNCTION PWM 3-Phase DC Brushless Motor Controller

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 to35V(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.

• •Maximum Supply Voltage (40V)
• •Operating Voltage (9.0 V to 35V)
• •3-Phase Full-Wave PWM Predriver (Hi-side:Pch-FET/ Low-side: Nch-FET)
• •Low-side Gate Voltage Clamp (Gate Voltage=18V max.)
• •Internal PWM Oscillation Circuit (Frequency Setting by External Capacitor)
• •Current Protection Circuit (Current limit=0.25V±10%)
• •Low-Voltage Protection Circuit
• •Forward/Reverse Direction (Changeable while Rotating ,Controllable Dead-Time Settings)
• •Soft-Start Function (Using External Capacitor)
• •ON/OFF Function (Stop with S/S Pin)
• •Brake Function
• •Lock Protection System
• •Thermal Shutdown Circuit
• •120°/60°Phase Difference Change Function
• •Multi-FG Output (2bit Input Change Type)
• •Bi-CDMOS Technology
• •Package Outline (SSOP32)