Freescale Semiconductor
Advance Information
Document Number: MC33926
Rev. 9.0, 12/2009
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 under-
voltage, over-current, and over-temperature 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
33926
AUTOMOTIVE THROTTLE H-BRIDGE
ACTUATOR/ MOTOR EXCITER
Bottom View
SCALE 2:1
PNB SUFFIX (Pb-FREE)
98ARL10579D
32-PIN PQFN
• 5.0 to 28 V continuous operation (transient operation from 5.0 to
40 V)
• 225 mΩ maximum R
DS(ON)
@ 150°C (each H-Bridge MOSFET)
ORDERING INFORMATION
• 3.0 V and 5.0 V TTL / CMOS logic compatible inputs
Temperature
Device
Package
• Over-current limiting (Regulation) via an internal constant-off-time
Range (T
A
)
PWM
MC33926PNB/R2 -40°C to 125°C
32 PQFN
• Output short-circuit protection (short to VPWR or ground)
• Temperature-dependent 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)
• Pb-free packaging designated by suffix code PNB
V
DD
V
PWR
33926
SF
FB
IN1
IN2
VPWR
CCP
OUT1
MOTOR
OUT2
PGND
AGND
MCU
INV
SLEW
D1
D2
EN
Figure 1. 33926 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., 2007-2009. All rights reserved.
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
