L9945集成电路（IC）的电源管理-专用规格书PDF中文资料

L9945属于集成电路（IC）的电源管理-专用。由意法半导体集团制造生产的L9945电源管理 - 专用专用型电源管理集成电路 (PMIC) 用于电源的控制或操作，适合特定或小范围的目标应用，例如汽车气囊管理、电容器组平衡、AC 公共电力监控、存储器总线端接、接地故障检测、能量收集、小型引擎管理、处理器或芯片集专用电压调节、负载突降保护、触觉驱动器、热电制冷器控制等。

特性 Features

• AEC-Q100 qualified

• 12 V and 24 V battery systems compliance

• 3.3 V and 5 V logic compatible I/O

• 8-channel configurable MOSFET pre-driver

– High-side (N-channel and P-channel MOS)

– Low-side (N-channel MOS)

– H-bridge (up to 2 H-bridge)

– Peak & Hold (2 loads)

• Operating battery supply voltage 3.8 V to 36 V

• Operating VDD supply voltage 4.5 V to 5.5 V

• Programmable gate charge/discharge currents for improving EMI behavior

• Individual diagnosis for:

– Short circuit to battery

– Open load

– Short circuit to ground

• Highly flexible overcurrent sensing implementation

– Possibility of monitoring external MOS drain to source voltage

– Possibility of monitoring voltage on external shunt resistor

– 64 programmable overcurrent thresholds independent for each channel

– Ultra-fast output shutdown in case of overcurrent

• Current limitation for H-Bridge configuration

• 32-bit SPI protocol available for configuration and diagnostics

– Failures latched even if they occur during diagnostics reading

– Daisy chain operation

– SDO protected against overvoltage

• Safety features

– Fast switch off redundant output disable by two external pins

– Built In Self Test (BIST) for logic operation

– Hardware Self Check (HWSC) for VDD5 overvoltage comparator

– Configurable Communication Check (CC) watchdog timer available

– Disable feedback by bi-directional pin

– Highly redundant output monitoring by dedicated SPI registers

• 10-bit ADC for battery and die temperature measurements available by SPI

• VDD5 monitoring for over/under voltage

• VPS (battery) monitoring for under voltage

Applications

• Automotive 12 and 24 V (passenger and commercial vehicles) applications

• Low-side, high-side, Peak and hold and H-Bridge load control

• Designed for driving relays, motors, and all the resistive and inductive loads