5.0 A throttle control H-bridge
Rev. 11 — 31 October 2017
Data sheet: technical data
1 General description
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
2 Simplified application diagram
Figure 1. Simplified application diagram
3 Features and benefits
• 5.0 V to 28 V continuous operation (transient operation from 5.0 V to 40 V)
• 225 mΩ maximum RDS(on) at 150 °C (each H-bridge MOSFET)
• 3.0 V and 5.0 V TTL/CMOS logic compatible inputs