ATA6824_08 Datasheet, PDF (1/24 Pages) ATMEL Corporation – High Temperature H-bridge Motor Driver

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
• QFN32 Package
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.
High
Temperature
H-bridge Motor
Driver
ATA6824
4931E–AUTO–01/08