ATA6824_08 ATMEL [ATMEL Corporation], ATA6824_08 Datasheet

Manufacturer Part Number

ATA6824_08

Description

High Temperature H-bridge Motor Driver

Manufacturer

ATMEL [ATMEL Corporation]

Datasheet

1.ATA6824_08.pdf (24 pages)

Features

•

1. Description

The ATA6824 is designed for DC motor control application in automotive high temper-

ature environment like in mechatronic assemblies in the vicinity of the hot engine, e.g.

turbo charger. With a maximum junction temperature of 200°C, ATA6824 is suitable

for applications with an ambient temperature up to 150°C.

The IC includes 4 driver stages to control 4 external power MOSFETs. An external

microcontroller provides the direction signal and the PWM frequency. In PWM opera-

tion, the high-side switches are permanently on while the low-side switches are

activated by the PWM frequency. ATA6824 contains a voltage regulator to supply the

microcontroller; via the input pin VMODE the output voltage can be set to 5V or 3.3V

respectively.

The on-chip window watchdog timer provides a pin-programmable time window. The

watchdog is internally trimmed to an accuracy of 10% SPI with a maximum data rate

of 20 kBaud.

PWM and Direction-controlled Driving of Four Externally-powered NMOS Transistors

High Temperature Capability up to 200 C Junction

A Programmable Dead Time Is Included to Avoid Peak Currents Within the H-bridge

Integrated Charge Pump to Provide Gate Voltages for High-side Drivers and to Supply

the Gate of the External Battery Reverse Protection NMOS

5V/3.3V Regulator and Current Limitation Function

Reset Derived From 5V/3.3V Regulator Output Voltage

A Programmable Window Watchdog

Battery Overvoltage Protection and Battery Undervoltage Management

Overtemperature Warning and Protection (Shutdown)

High Voltage Serial Interface for Communication

QFN32 Package

High

Temperature

H-bridge Motor

Driver

ATA6824

4931E–AUTO–01/08