ATA6824C
High Temperature H-bridge Motor Driver
DATASHEET Features
в—Џ PWM and direction-controlled driving of four externally-powered NMOS transistors
в—Џ High temperature capability up to 200В°C junction
в—Џ A programmable dead time is included to avoid peak currents within the H-bridge
в—Џ Integrated charge pump to provide gate voltages for high-side drivers and to supply
the gate of the external battery reverse protection NMOS
в—Џ 5V/3.3V regulator and current limitation function
в—Џ Reset derived from 5V/3.3V regulator output voltage
в—Џ A programmable window watchdog
в—Џ Battery overvoltage protection and battery undervoltage management
в—Џ Overtemperature warning and protection (Shutdown)
в—Џ High voltage serial interface for communication
в—Џ TPQFP package Description
The AtmelВ® 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 200В°C, Atmel ATA6824C is
suitable for applications with an ambient temperature up to 150В°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 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 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 …