Power Electronics / Power Management


Half-bridge driver targets automotive applications

22 August 2007 Power Electronics / Power Management

Atmel's ATA6836 is a low-cost half-bridge driver IC with high voltage capability (up to 40 V), aimed at automotive applications. The device is a fully protected hex half-bridge driver with integrated power stages. Each of the six high-side and low-side drivers is capable of driving currents up to 650 mA via a microcontroller. Customers' assembly efforts are substantially reduced as external clamping diodes are not needed due to the half-bridge configuration. One of the main applications of the ATA6836 is the actuation of three fully independent DC motors in three H-bridges. It also supports the operation of up to five DC motors sharing four common lines, provided that the motors are not all actuated at the same time. The IC provides several protection features such as over-temperature warning and shutdown, overload, over-voltage protection, and full protection against short-circuits. The SPI output register contains a number of diagnostic bits, which can be read by the microcontroller. The ATA6836 features 4 kV ESD protection and meets the strict automotive qualification demands (protection against conducted interference, EMC, and ESD protection) and can withstand transients as specified in ISO/TR 7637.



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