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A3930 PDF预览

A3930

更新时间: 2024-11-07 03:16:35
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器控制器
页数 文件大小 规格书
21页 450K
描述
Automotive 3-Phase BLDC Controller and MOSFET Driver

A3930 数据手册

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A3930 and A3931  
Automotive 3-Phase BLDC Controller and MOSFET Driver  
Features and Benefits  
Description  
High current 3-phase gate drive for N-channel MOSFETs  
Synchronous rectification  
Cross-conduction protection  
Charge pump and top-off charge pump for 100% PWM  
Integrated commutation decoder logic  
Operation over 5.5 to 50 V supply voltage range  
Extensive diagnostics output  
TheA3930andA3931are3-phasebrushlessdc(BLDC)motor  
controllers for use with N-channel external power MOSFETs.  
They incorporate much of the circuitry required to design a  
cost effective three-phase motor drive system, and have been  
specifically designed for automotive applications.  
A key automotive requirement is functionality over a wide  
input supply range. A unique charge pump regulator provides  
adequate (>10V) gate drive for battery voltages down to 7V,  
and allows the device to operate with a reduced gate drive at  
battery voltages down to 5.5V. Power dissipation in the charge  
pumpisminimizedbyswitchingfromavoltagedoublingmode  
at low supply voltage to a dropout mode at the nominal running  
voltage of 14V.  
Provides +5 V Hall sensor power  
Low-current sleep mode  
A bootstrap capacitor is used to provide the above-battery  
supply voltage required for N-channel MOSFETs.An internal  
charge pump for the high-side drive allows for dc (100% duty  
cycle) operation.  
Package: 48 Lead LQFP with exposed  
thermal pad (suffix JP)  
Internal fixed-frequency PWM current control circuitry can  
be used to regulate the maximum load current. The peak  
load current limit is set by the selection of an input reference  
voltage and external sensing resistor. The PWM frequency is  
set by a user-selected external RC timing network. For added  
flexibility, the PWM input can be used to provide speed and  
Continued on the next page…  
Typical Application  
3930-DS  
Preliminary Data Sheet Subject to Change Without Notice April 6, 2006  

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