ATA6823-DK Microchip

H-bridge Gate Driver with LIN Transceiver, Watchdog, and 5V Regulator Atmel ATA6823 1. Introduction H-bridge Gate The Atmel ATA6823 is designed specifically for automotive applications that require high-power motors. It provides four high-current gate driver outputs capable of driving Driver with LIN a wide range of n-channel power MOSFETs in a full-bridge configuration. A fully inte- grated charge pump with external capacitors provides the gate voltage for the Transceiver, high-side output stages. Watchdog and The Atmel ATA6823 supports low-speed LIN-data communication up to 20kBaud in compliance with LIN specification 2.0 using a built-in LIN transceiver. Protection fea- 5V Regulator tures include undervoltage/overvoltage detection and shutdown, overtemperature shutdown, and short circuit detection of motor leads to battery voltage and to ground. Shoot-through protection is guaranteed using a dead-time adjustment which can be Application Note set by hardware. 2. Application Board The Atmel ATA6823 application board allows the running of a DC motor. The supply voltage is 8V to 18V, maximum power of the DC motor is limited by the external H-bridge MOSFETs. No microcontroller is implemented on-board. It is possible to con- trol the motor either via an external microcontroller (with or without LIN bus), or directly (using the DIR and PWM pins). 2.1 Features Header Pins X1 to Connect to LIN Bus as well as Power Supply Output and EN2 Wake-up (See Table 2-1 on page 6) Microcontroller Connector Interface (See Table 2-2 on page 6) 4-mm Banana Plugs to Connect Power Supply BAT and GND (See Figure 2-2 on page 3) Included Power DC Motor On-board, Turn Direction Indicated by LEDs Vias M+ and M to Connect Optional DC Motor Optional Connection of External Motor H-bridge (See Figure 2-6 on page 8) Push-button EN2 to Wake-up Atmel ATA6823 Jumper VMODE to Select VCC Output Voltage Level Jumper RWD to Select Different WD Resistors Shunt for DC Motor Current Measurement 4961BAUTO02/11Figure 2-1. Application Board 2 Atmel ATA6823 4961BAUTO02/11