Rainbow Electronics ATA6824 - Manual

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 high temperature mechatronic applications, for example
turbo chargers, where the electronic is mounted very close to the hot engine. In such
harsch environments the ICs have to withstand temperatures up to 150
°
C ambient
which results in junction temperatures up to 200
°
C. The IC is used to drive a continu-
ous current motor in a full H-bridge configuration. An external microcontroller controls
the driving function of the IC by providing a PWM signal and a direction signal and
allows the use of the IC in a motor-control application. The PWM control is performed
by the low-side switch; the high-side switch is permanently on in the driving phase.
The VMODE configuration pin can be set to 5V or 3.3V mode (for regulator and inter-
face high level). The window watchdog has a programmable time, programmable by
choosing a certain value of the external watchdog resistor RWD, internally trimmed to
an accuracy of 10%. To communicate with a host controller there is a HV Serial Inter-
face integrated.
High
Temperature
H-bridge Motor
Driver
ATA6824
Preliminary
4931C–AUTO–09/06