ATA6824_09 Datasheet, PDF (1/25 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/TPQFP 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%. For communication a high volt-
age serial interface with a maximum data range of 20 kBaud is integrated.
High
Temperature
H-bridge Motor
Driver
ATA6824
4931G–AUTO–04/09