Product category:
Memory Devices and Modules
News Release from: Solid State Supplies | Subject: A3936
Edited by the Electronicstalk Editorial
Team on 08 March 2002
Compact motor controller does it all
on-chip
Featuring 3A-capable DMOS outputs and on-chip commutation logic, the A3936 is a cost-effective addition to the latest generation of three-phase brushless DC motor controller/driver ICs.
Featuring 3A-capable DMOS outputs and on-chip commutation logic, the A3936 is a smaller cost-effective addition to the latest generation of three-phase brushless DC motor controller/driver ICs from Solid State Supplies The device offers PWM current control of three-phase brushless DC motors, low on-resistance DMOS outputs, synchronous rectification, 3 and 5V logic voltage compatibility and configurable slow, fast and mixed-decay modes
This article was originally published on Electronicstalk on 6 Feb 2001 at 8.00am (UK)
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Synchronous rectification of the integrated on-chip power DMOS outputs is accomplished onboard the IC with no external commands required.
Synchronous rectification provides significant improvements in the thermal efficiency of the IC during PWM operation, and eliminates the need for costly external diodes.
Low power dissipation is achieved through the efficient use of the DMOS outputs during both the on and off cycle of the PWM waveform.
The A3936 will operate with motor supply voltages up to 50V and motor winding currents of 3A and is also compatible with both 5 and 3V logic supplies.
A tachometer output is provided to enable easy implementation of an external speed control loop.
The commutation of the motor is easily implemented by supplying the A3936 with three Hall-effect sensor inputs.
The IC then processes these inputs and switches the output stages in the proper sequence for either forward or reverse movement of the motor and load.
Designed to meet the requirements of the white goods, process control equipment, medical equipment manufacturers and office automation applications, the A3936 is supplied in a 44-lead PLCC with a copper batwing tab.
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