ATA6824C_14 Datasheet, PDF (1/24 Pages) ATMEL Corporation – High Temperature H-bridge Motor Driver

ATA6824C
High Temperature H-bridge Motor Driver
DATASHEET
Features
● 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
● TPQFP package
Description
The Atmel^® ATA6824C is designed for DC motor control application in automotive high
temperature environment like in mechatronic assemblies in the vicinity of the hot engine,
e.g. turbo charger. With a maximum junction temperature of 200°C, Atmel ATA6824C 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 micro-
controller provides the direction signal and the PWM frequency. In PWM operation, the
high-side switches are permanently on while the low-side switches are activated by the
PWM frequency. Atmel ATA6824C contains a voltage regulator to supply the microcon-
troller; 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%. For communication a high voltage
serial interface with a maximum data range of 20kBaud is integrated.
9212G-AUTO-09/13