Rainbow Electronics ATA6834 - Manual

Features
• ATA6833 Temperature Range T
A
= 125°C, T
J
= 150°C
• ATA6834 Extended Temperature Range T
A
= 150°C, 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
9122B–AUTO–10/08