Rainbow Electronics ATA6837 - Manual

Features
• Six Half-bridge Outputs Formed by Six High-side and Six Low-side Drivers
• Capable of Switching all Kinds of Loads (Such as DC Motors, Bulbs, Resistors,
Capacitors and Inductors)
• R
DSon
Typically 1.0
Ω
at 25°C, Maximum 2.2
Ω
at 200°C
• Up to 650-mA Output Current
• Very Low Quiescent Current I
S
< 20 µA in Standby Mode
• Outputs Short-circuit Protected
• Overtemperature Prewarning and Protection
• Undervoltage Protection
• Various Diagnosis Functions Such as Shorted Output, Open Load, Overtemperature
and Power Supply Fail
• Serial Data Interface
• Operation Voltage up to 40V
• Daisy Chaining Possible
• Serial Interface 5V and 3.3V Compatible, up to 2 MHz Clock Frequency
• QFN24 Package
1. Description
The ATA6837 is designed for high-temperature applications. In mechatronic solutions,
for example, turbo charger or exhaust gas recirculation systems, many flaps have to
be controlled by DC motor driver ICs which are located very close to the hot engine or
actuator and where ambient temperatures up to 150°C are usual. Due to the advan-
tages 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 ATA6837 is a fully protected hex half-bridge driver, used to control up to 6 differ-
ent loads by a microcontroller in automotive and industrial applications.
Each of the six high-side and six low-side drivers is capable of driving currents up to
650 mA. The drivers are internally connected to form 6 half-bridges and can be con-
trolled separately from a standard serial data interface. Therefore, all kinds of loads,
such as bulbs, resistors, capacitors and inductors, can be combined. The IC espe-
cially supports the application of H-bridges to drive DC motors.
Protection is guaranteed in terms of short-circuit conditions, overtemperature and
undervoltage. Various diagnosis functions and a very low quiescent current in standby
mode make a wide range of applications possible.
Automotive qualification referring to conducted interferences, EMC protection and
ESD protection gives added value and enhanced quality for the exacting requirements
of automotive applications.
High
Temperature
Hex Half-bridge
Driver with
Serial Input
Control
ATA6837
Preliminary
4953C–AUTO–09/07