Rainbow Electronics ATA6832 - Manual

Features
• Supply Voltage up to 40V
• R
DSon
Typically 0.8
Ω
at 25°C, Maximum 1.8
Ω
at 200°C
• Up to 1.0A Output Current
• Three Half-bridge Outputs Formed by Three High-side and Three Low-side Drivers
• Capable of Switching Loads such as DC Motors, Bulbs, Resistors, Capacitors, and
Inductors
• PWM Capability up to 25 kHz for Each Output Controlled by External PWM Signal
• No Shoot-through Current
• Outputs Short-circuit Protected
• Selective Overtemperature Protection for Each Switch and Overtemperature
Prewarning
• Undervoltage Protection
• Various Diagnostic Functions such as Shorted Output, Open Load, Overtemperature
and Power-supply Fail Detection
• Serial Data Interface, Daisy Chain Capable, up to 2 MHz Clock Frequency
• QFN18 Package
1. Description
The ATA6832 is a fully protected driver IC specially designed for high temperature
applications. In mechatronic solutions, for example turbo charger or exhaust gas recir-
culation systems, many flaps have to be controlled by DC motor driver ICs which are
located very close to the hot engine or actuator where ambient temperatures up to
150°C are usual. Due to the advantages of SOI technology junction temperatures up
to 200°C are allowed. This enables new cost effective board design possibilities to
achieve complex mechatronic solutions.
The ATA6832 is a triple half-bridge driver to control up to 3 different loads by a micro-
controller in automotive and industrial applications. Each of the 3 high-side and 3
low-side drivers is capable of driving currents up to 1.0A. Due to the enhanced PWM
signal (up to 25 kHz) it is possible to generate a smooth control of, for example, a DC
motor without any noise. The drivers are internally connected to form 3 half-bridges
and can be controlled separately from a standard serial data interface, enabling all
kinds of loads, such as bulbs, resistors, capacitors and inductors, to be combined.
The IC design especially supports the application of H-bridges to drive DC motors.
Protection is guaranteed with respect to short-circuit conditions, overtemperature and
undervoltage. Various diagnostic functions and a very low quiescent current in
standby mode enable a wide range of applications. Automotive qualification (protec-
tion against conducted interferences, EMC protection and 2-kV ESD protection) gives
added value and enhanced quality for exacting requirements of automotive
applications.
High
Temperature
Triple
Half-bridge
Driver with SPI
and PWM
ATA6832
4951A–AUTO–08/06