Melexis motor driver has on chip EEPROM
Three phase brush-less DC (BLDC) motor applications are the design targets for a pre-driver IC from Melexis which uses EEPROM memory and combined bootstrap and charge pump blocks.
The MLX83203 pre-driver is designed for small size and is offered in a standard, QFN32 5×5 package.
The IC drives six 250nC NFETS up to 25kHz, while keeping 10V gate voltage down to 7V battery voltage.
For fail safe torque control applications, the pre-driver features diagnostics and a low noise amplifier. Rather than configuring the pre-driver by applying external resistors, 6 bytes of on-chip EEPROM offer configuration options while minimising pin count.
The operating voltage range from 4.5V to 28V, plus bootstrap topology complemented with a charge pump stage, allows the power stage to be operated via standard level NFETs without loss of performance during stop/start conditions, as well as enabling control even during engine cranking.
The charge pump can be configured for applying a high side NFET reverse polarity protection.
In sleep mode the IC consumes less than 30µA standby current. A 10MHz gain bandwidth product (GBW) delivers shunt amplifier settling times of less than 1µs for fast current feedback.
Its gain can be programmed in a wide range from 8 up to 48, and the input range can be configured from fully symmetric to full scale.
The power stage (VDS, VGS) as well as all input voltages are monitored with comparators to offer maximum system level diagnostics. A high speed serial interface provides diagnostics feedback to the microcontroller.
The MLX83203 will be released for operation up to 150 °C and qualification to 175 °C is planned for the near future.
The device is sampling and production will be released in Q1 2013.