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Device
Package
Freescale Semiconductor
Technical Data
5.0 A H-Bridge with Load
Current Feedback
The 33887 is a monolithic H-Bridge Power IC with a load current
feedback feature making it ideal for closed-loop DC motor control.
The IC incorporates internal control logic, charge pump, gate drive,
and low R DS(ON) MOSFET output circuitry. The 33887 is able to
control inductive loads with continuous DC load currents up to 5.0 A,
and with peak current active limiting between 5.2 A and 7.8 A. Output
loads can be pulse width modulated (PWM-ed) at frequencies up to
10 kHz. The load current feedback feature provides a proportional (1/
375th of the load current) constant-current output suitable for
monitoring by a microcontroller ’s A/D input. This feature facilitates
the design of closed-loop torque/speed control as well as open load
detection.
A Fault Status output pin reports undervoltage, short circuit, and
overtemperature conditions. Two independent inputs provide polarity
control of two half-bridge totem-pole outputs. Two disable inputs
force the H-Bridge outputs to tri-state (exhibit high-impedance).
The 33887 is parametrically specified over a temperature range of
-40 ° C ≤ T A ≤ 125 ° C and a voltage range of 5.0 V ≤ V+ ≤ 28 V.
Operation with voltages up to 40 V with derating of the specifications.
Features
? Fully specified operation 5.0 V to 28 V
? Limited operation with reduced performance up to 40 V
? 120 m Ω R DS(ON) Typical H-Bridge MOSFETs
? TTL/CMOS Compatible Inputs
? PWM Frequencies up to 10 kHz
Document Number: MC33887
Rev. 16.0, 10/2012
33887
H-BRIDGE
VW SUFFIX (Pb-FREE)
98ASH70702A
20-PIN HSOP
FK SUFFIX
98ASA10583D
36-PIN PQFN
Bottom View
EK SUFFIX (Pb-FREE)
98ASA10506D
54-PIN SOICW-EP
ORDERING INFORMATION
Temperature
Range (T A )
MC33887APVW/R2 20 HSOP
MC33887PFK/R2 -40 ° C to 125 ° C 36 PQFN
MC33887PEK/R2 54 SOICW-EP
?
?
?
Active Current Limiting (Regulation)
Fault Status Reporting
Sleep Mode with Current Draw ≤ 50 μ A (Inputs Floating or Set
to Match Default Logic States)
6 .0 V
33887
V+
CCP
V+
IN
OUT
FS
EN
OUT1
MCU
OUT
IN1
OUT
OUT
OUT
A/D
IN2
D1
D2
FB
OUT2
MOTOR
PGND
AGND
Figure 1. 33887 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., 2012. All rights reserved.
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