Document Number: MC33926

Rev. 4.0, 12/2006

Freescale Semiconductor

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© Freescale Semiconductor, Inc., 2007. All rights reserved.

*This document contains certain information on a product under development. Free-

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5.0 A Throttle Control H-Bridge

The 33926 is a 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

input invert input changes the IN1 and IN2 inputs to LOW = true logic.

Features

• 8.0 V to 28 V Continuous Operation (Transient Operation from

5.0 V to 36 V)

• 225 m

Ω maximum R

• 3.0 V and 5.0 V TTL / CMOS Logic Compatible Inputs

• Overcurrent Limiting (Regulation) via Internal Constant-Off-

Time PWM

• Output Short Circuit Protection (Short to VPWR or Ground)

• 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 (with Inputs Floating or Set to Match Default Logic States)

Figure 1. 33926 Simplified Application Diagram

ORDERING INFORMATION

Device

Temperature

Package

PC33926PNB/R2

- 40°C to 125°C

32 PQFN

SCALE 2:1

PNB SUFFIX

98ARL10579D

32-PIN PQFN

Bottom View

33926

AUTOMOTIVE THROTTLE H-BRIDGE

ACTUATOR/ MOTOR EXCITER

SF

FB

IN1

IN2

INV

SLEW

D1

D2

EN

VPWR

CCP

OUT1

OUT2

PGND

AGND

MCU

33926

MOTOR