System basis chip for three-phase brushless DC motor controllers designed in the Microchip 0.18-µm SOI technology SMART-I.S.™. The chip forms a BLDC motor control unit for automotive applications in combination with a microcontroller and six discrete power MOSFETs. Works in extended supply voltage range from 5.25V up to 32V. It features a Tjunction of up to 200°C. Its circuits provide a 3.3V/5V linear regulator and a window watchdog. It includes various control and protection functions like overvoltage and over-temperature protection, adjustable short circuit detection, undervoltage management and coast function. Its drivers fulfill maximum safety requirements and offer a high integration level to save cost and space.

• Broad operation voltage range from 5.25V to 32V
• ATA6844 extended temperature range T_J = 200°C
• Direct driving of six external NMOS transistors with a maximum switching frequency of 50kHz
• 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 < 45μA
• Wake-up via LIN bus or high voltage input
• Programmable window watchdog
• Battery overvoltage protection and battery under voltage management
• Overtemperature warning and protection (shutdown)
• Jump start compatible
• LIN transceiver conformal to LIN 2.1 and SAEJ2602-2 with outstanding EMC and ESD performance
• QFN48 package 7mm x 7m