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参数资料
| 型号： | A4940KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC MOSF DVR FULL BRIDGE 24TSSOP |
| 标准包装： | 1 |
| 配置： | 半桥 |
| 输入类型： | 非反相 |
| 延迟时间： | 35ns |
| 配置数： | 1 |
| 输出数： | 4 |
| 电源电压： | 5.5 V ~ 50 V |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 24-TSSOP 裸露焊盘 |
| 包装： | 标准包装 |
| 产品目录页面： | 1141 (CN2011-ZH PDF) |
| 其它名称： | 620-1319-6 |
A4940
Automotive Full Bridge MOSFET Driver
Features and Benefits
? High current gate drive for N-channel MOSFET full bridge
? Independent control of each MOSFET
? Charge pump for low supply voltage operation
? Cross-conduction protection with adjustable dead time
? 5.5 to 50 V supply voltage range
? Diagnostics output
? Low current sleep mode
Package: 24-pin TSSOP with exposed
thermal pad (suffix LP)
Not to scale
Description
The A4940 is a full-bridge controller for use with external
N-channel power MOSFETs and is specifically designed for
automotive applications with high-power inductive loads such
as brush DC motors.
A unique charge pump regulator provides full ( >10 V ) gate
drive for battery voltages down to 7 V and allows the A4940
to operate with a reduced gate drive, down to 5.5 V.
A bootstrap capacitor is used to provide the above battery
supply voltage required for N-channel MOSFETs. A unique
bootstrap charge management system ensures that the bootstrap
capacitor is always sufficiently charged to supply the high-side
gate drive circuit.
Each of the power MOSFETs is controlled independently but
all are protected from shoot-through by dead time that is user-
configured by an external resistor.
Integrated diagnostics provide indication of undervoltage and
overtemperature faults.
The A4940 is supplied in a 24-pin TSSOP power package with
an exposed pad for enhanced thermal dissipation (package
type LP). It is lead (Pb) free, with 100% matte tin leadframe
plating (suffix –T).
Typical Application
FAULT
AHI
BHI
A4940
VBAT
M
ALO
BLO
A4940-DS, Rev. 1
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