Rainbow Electronics ATA6831 - Manual

Features
• Supply Voltage up to 40V
• R
DSon
Typically 0.8
Ω
at 25°C, Maximum 1.5
Ω
at 150°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 High-side Output Controlled by External PWM
Signal
• No Shoot-through Current
• Very Low Quiescent Current I
S
< 5 µA in Standby Mode over Total Temperature Range
• 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 ATA6831 provides fully protected driver interfaces designed in SOI technology.
They are used to allow a microcontroller to control up to 3 different loads in automo-
tive 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 inter-
nally 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.
Triple
Half-bridge
Driver with SPI
and PWM
ATA6831
4908D–AUTO–09/06