ATA6843-PLQW-1 Microchip

ATA6843/ATA6844 BLDC Motor Driver and LIN System Basis Chip DATASHEET Features Broad operation voltage range from 5.25V to 32V Atmel ATA6843 temperature range T = 150C J Atmel ATA6844 extended temperature range T = 200C J 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 < 45A Wake-up via LIN bus or high voltage input Programmable window watchdog Battery overvoltage protection and battery undervoltage 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 7mm 9189K-AUTO-02/151. Description The Atmel ATA6843 and Atmel ATA6844 are system basis chips for three-phase brushless DC motor controllers designed in Atmels state-of-the-art 0.8m SOI technology SMART-I.S. 1. In combination with a microcontroller and six discrete power MOSFETs, 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 overtemperature 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 technology and the high qualification level. Atmel ATA6844, in particular, is designed for applications in a high-temperature environment. Figure 1-1. Block Diagram VBAT H3 High-side VCC VCC VG Driver 3 Charge Pump Regulator Regulator H2 High-side /RESET Driver 2 WD VINT VBG Oscillator H1 High-side /IH1-3 Regulator Driver 1 IL1-3 Control S1 Hall C Logic SLEEP S2 Supervisor: Hall B COAST Short Circuit Driver S3 Overtemperature Control Hall A L1 Low-side Undervoltage DG1 Driver 1 DG2 Atmel ATA6843/44 DG3 Low-side L2 Driver 2 RX WD CC L3 Low-side TX LIN Timer Timer Driver 3 Hall C Hall B Hall A LIN 2 ATA6843/ATA6844 DATASHEET 9189KAUTO02/15 Microcontroller VBAT LIN VMODE LINGND EN VINT SCREF VG GND WDEN CPLO1 CPHI1 RWD CPLO2 CPHI2 CC CPOUT PGND PBAT