Freescale Semiconductor
Advance Information
Document Number: MC33931
Rev. 2.0, 12/2008
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
33931
THROTTLE CONTROL H-BRIDGE
VW SUFFIX (PB-FREE)
98ARH98330A
44-PIN HSOP
WITH PROTRUDING HEAT SINK
ORDERING INFORMATION
Temperature
Package
44 HSOP
Device
• 8.0 V to 28 V continuous operation (transient operation from
Range (T
A
)
5.0 V to 40 V)
MC33931VW/R2
-40°C to 125°C
• 235 mΩ maximum R
DS(ON)
@ T
j
=150°C (each H-bridge
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)
V
DD
V
PWR
33931
SF
FB
VPWR
CCP
OUT1
IN1
MOTOR
OUT2
D1
EN/D2
PGND
AGND
MCU
IN2
Figure 1. MC33931 Simplified Application Diagram
* 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.
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
