Features
• ATA6833 Temperature Range T
J
= 150°C
ATA6834 Extended Temperature Range T
J
= 200°C
Direct Driving of 6 External NMOS Transistors with a Maximum Switching Frequency of
50 kHz
Integrated Charge Pump to Provide Gate Voltages for High-side Drivers and to Supply
the Gate of the External Battery Reverse Protection NMOS
Built-in 5V/3.3V Voltage Regulator with Current Limitation
Reset Signal for the Microcontroller
Sleep Mode with Supply Current of typically < 45 µA
Wake-up via LIN Bus or High Voltage Input
Programmable Window Watchdog
Battery Overvoltage Protection and Battery Undervoltage Management
Overtemperature Warning and Protection (Shutdown)
200 mA Peak Current for Each Output Driver
LIN Transceiver Conformal to LIN 2.1 and SAEJ2602-2 with Outstanding EMC and ESD
Performance
QFN48 Package 7 mm × 7 mm
1. Description
The ATA6833 and ATA6834 are system basis chips for three-phase brushless DC
motor controllers designed in Atmel
®
’s state-of-the-art 0.8 µm SOI technology
SMART-I.S.
™
1. In combination with a microcontroller and six discrete power MOS-
FETs, the system basis chip forms a BLDC motor control unit for automotive
applications. In addition, the circuits provide a 3.3V/5V linear regulator and a window
watchdog.
The circuit includes various control and protection functions like overvoltage and over-
temperature protection, short circuit detection, and undervoltage management.
Thanks to these function blocks, the driver fulfils a maximum of safety requirements
and offers a high integration level to save cost and space in various applications. The
target applications are most suitable for the automotive market due to the robust tech-
nology and the high qualification level. ATA6834, in particular, is designed for
applications in a high-temperature environment.
BLDC Motor
Driver and LIN
System Basis
Chip
ATA6833
ATA6834
Preliminary
9122F–AUTO–03/10