The A4964 is a three-phase, sensorless, brushless DC (BLDC) motor controller for use with external N-channel power MOSFETs and is specifically designed for automotive applications. It is designed to provide the motor control functions in a system where a small microcontroller provides the communication interface to a central ECU and intelligent fault and status handling. The A4964 provides the supply and watchdog for the microcontroller and the high-voltage interfaces between the microcontroller and the central ECU and ignition switch. The A4964 can also operate as an independent singlechip remote motor controller.
The motor is driven using 3-phase sinusoidal current drive where phase commutation is determined, without the need for independent position sensors, by monitoring the motor back-EMF (bemf). The sensorless start-up scheme includes forward and reverse pre-rotation (windmill) detection and synchronization, and allows the A4964 to operate over a wide range of motor and load combinations.
A4964可与占空比（电压）控制，电流（扭矩限制）控制和闭环速度控制一起操作。控制模式，操作模式和控制参数通过SPI兼容的串行接口进行编程。
A single current sense amplifier provides peak current limiting and average current measurement through the serial interface.
Integrated diagnostics provide indication of undervoltage, overtemperature, and power bridge faults and can protect the power switches under most short-circuit conditions.
The A4964 is provided in a 36-terminal QFN and a 32-lead QFP, both with exposed thermal pad.
| Part Number | Package Type | Temperature | RoHS Compliant |
Part Composition / RoHS Data |
Comments | Samples | Check Stock |
|---|---|---|---|---|---|---|---|
| A4964KEVTR-J | 36-lead QFN/MLP | -40°C to 150°C | Yes | View Data | Contact your local sales rep |
Check Distributor Stock |
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| A4964KJPTR-T | 32-lead LQFP | -40°C to 150°C | Yes | View Data | Contact your local sales rep |
Check Distributor Stock |
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| APEK4964KEV-01-T | DEMO BOARD | -40°C to 150°C | No | -- | Contact your local sales rep |
Check Distributor Stock |
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| APEK4964KJP-01-T | DEMO BOARD | -40°C to 150°C | No | -- | Contact your local sales rep |
Check Distributor Stock |
Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.
