A3935中文资料3相电源MOSFET控制器为汽车应用数据手册Allegro规格书

描述 Description

A3935KLQTR-T variant is in production but has been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of the variant is currently restricted to existing customer applications. The variant should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Status change: October 31, 2011. Recommended Replacement: A4933KJPTR-T.

A3935KLQTR variant has been determined to be obsolete and is no longer in production. Status change: October 31, 2011.

The A3935 is designed specifically for automotive applications that require high-power motors. Each provides six high-current gate drive outputs capable of driving a wide range of N-channel power MOSFETs.

A requirement of automotive systems is steady operation over a varying battery input range. The A3935 integrates a pulse-frequency modulated boost converter to create a constant supply voltage for driving the external MOSFETs. Bootstrap capacitors are utilized to provide the above battery supply voltage required for N-channel FETs.

Direct control of each gate output is possible via six TTL-compatible inputs. A differential amplifier is integrated to allow accurate measurement of the current in the three-phase bridge.

Diagnostic outputs can be continuously monitored to protect the driver from short-to-battery, short-to-supply, bridge-open, and battery under/overvoltage conditions. Additional protection features include dead-time, VDD undervoltage, and thermal shutdown.

特性 Features

• Drives wide range of N-channel MOSFETs in 3-phase bridges
• PFM boost converter for use with low-voltage battery supplies
• Internal LDO regulator for gate-driver supply
• Bootstrap circuits for high-side gate drivers
• Current monitor output
• Adjustable battery overvoltage detection
• Diagnostic outputs
• Motor lead short-to-battery, short-to-ground, and bridge-open protection
• Undervoltage protection
• –40°C to 150°C TJ operation
• Thermal shutdown

简介

A3935属于集成电路（IC）的电机驱动器控制器。由制造生产的A3935电机驱动器，控制器产品属于电机驱动器和控制器电源管理集成电路 (PMIC) 系列，可用于控制或操作从某电源施加到电机或相关机电执行器的电源。所实现的具体功能和特性集根据预期负载和预期应用的特性有很大差异，范围从用于有刷电机的简单开环速度控制到基于步进电机的高级闭环运动控制。