33926

Freescale Semiconductor Technical Data 5.0 A Throttle Control H-Bridge The 33926 is a SMARTMOS monolithic H-Bridge Power IC designed primarily for automotive electronic throttle control, but is applicable to any low-voltage DC servo motor control application within the current and voltage limits stated in this specification. The 33926 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 peak-current 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 20 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 undervoltage, overcurrent, and overtemperature fault conditions. Two independent inputs provide polarity control of two half-bridge totem-pole outputs. Two independent disable inputs are provided to force the H-Bridge outputs to tri-state (high-impedance off state). An inverted input changes the IN1 and IN2 inputs to LOW = true logic. Features 5.0 to 28 V continuous operation (transient operation from 5.0 to 40 V) 225 m maximum RDS(on) at 150 °C (each H-Bridge MOSFET) 3.0 V and 5.0 V TTL / CMOS logic compatible inputs Overcurrent limiting (Regulation) via an internal constant-off-time PWM Output short-circuit protection (...