Document Number: MC33931

Rev. 2.0, 12/2008

Freescale Semiconductor

Advance Information

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

© Freescale Semiconductor, Inc., 2008. All rights reserved.

5.0 A Throttle Control H-bridge

The 33931 is a monolithic H-bridge Power IC in a robust thermally

enhanced package. It is 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 33931 H-bridge 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 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.

Two independent inputs provide polarity control of two half-bridge

totem-pole outputs. The disable inputs are provided to force the H-

bridge outputs to tri-state (high-impedance off-state).

Features

•8.0 V to 28 V continuous operation (transient operation from

5.0 V to 40 V)

• 235 m

MOSFET)

•3.0 V and 5.0 V TTL / CMOS logic compatible inputs

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

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

• 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 < 50 µA (each half with inputs floating or set to match default logic states)

Figure 1. MC33931 Simplified Application Diagram

THROTTLE CONTROL H-BRIDGE

33931

ORDERING INFORMATION

Device

Temperature

Package

MC33931VW/R2

-40°C to 125°C

44 HSOP

VW SUFFIX (PB-FREE)

98ARH98330A

44-PIN HSOP

WITH PROTRUDING HEAT SINK

SF

FB

IN1

IN2

D1

EN/D2

VPWR

CCP

OUT1

OUT2

PGND

AGND

MCU

33931

MOTOR