Freescale Semiconductor
Technical Data
Document Number: MC33887
Rev. 14.0, 3/2011
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 mΩ R
DS(ON)
Typical H-Bridge MOSFETs
TTL/CMOS Compatible Inputs
PWM Frequencies up to 10 kHz
Active Current Limiting (Regulation)
Fault Status Reporting
Sleep Mode with Current Draw
≤50 μA
(Inputs Floating or Set
to Match Default Logic States)
6.0 V
V+
Device
MC33887APVW/R2
MC33887PFK/R2
MC33887PEK/R2
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
)
-40°C to 125°C
Package
20 HSOP
36 PQFN
54 SOICW-EP
33887
CCP
IN
OUT
FS
EN
IN1
IN2
D1
D2
FB
OUT2
PGND
AGND
MOTOR
V+
OUT1
MCU
OUT
OUT
OUT
OUT
A/D
Figure 1. 33887 Simplified Application Diagram
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,
as may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2007 - 2011. All rights reserved.
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
