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5.0 A Throttle Control H-Bridge

The 33932 is a monolithic H-Bridge Power IC in a robust thermally enhanced package. The 33932 has two independent monolithic ? H-Bridge Power ICs in the same package. They are designed primarily for automotive electronic throttle control, but are applicable to any low voltage DC servo motor control application within the current and voltage limits stated in this specification.

Each H-Bridge in the 33932 is able to control inductive loads with currents up to 5.0 A peak. RMS current capability is subject to the degree of heatsinking provided to the device package. Internal peakcurrent limiting (regulation) is activated at load currents above 6.5 A ±1.5 A. Output loads can be pulse-width modulated (PWM-ed) at frequencies up to 11 kHz. A load current feedback feature provides a proportional (0.24 of the load current) current output suitable for monitoring by a microcontroller’s A/D input. A Status Flag output reports under-voltage, over-current, and over-temperature fault conditions.

Features

? 8.0 to 28 V continuous operation (transient operation from 5.0 to 40 V)

? 235 mΩ maximum RDS(ON) at 150 °C (each H-Bridge MOSFET)

? 3.0 and 5.0 V TTL / CMOS logic compatible inputs

? Output short-circuit protection (short to VPWR or GND)

? Over-current limiting (regulation) via internal constant-off-time PWM

? Temperature dependant current limit threshold reduction

? All inputs have an internal source/sink to define the default (floating input) states

? Sleep mode with current draw