33887 Datasheet, PDF (1/37 Pages) Freescale Semiconductor, Inc – 5.0 A H-Bridge with Load Current Feedback

Freescale Semiconductor
Technical Data
Document Number: MC33887
Rev. 12.0, 2/2007
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)
• Pb-Free Packaging Designated by Suffix Codes VW and EK
33887
H-BRIDGE
DH SUFFIX
VW SUFFIX (Pb-FREE)
98ASH70273A
20-PIN HSOP
PNB SUFFIX
98ASA10583D
36-PIN PQFN
Bottom View
DWB SUFFIX
EK SUFFIX (Pb-FREE)
98ASA10506D
54-PIN SOICW-EP
ORDERING INFORMATION
Device
MC33887DH/R2
MC33887VW/R2
Temperature
Range (T_A)
Package
20 HSOP
MC33887PNB/R2 _{-40°C to 125°C}
36 PQFN
MC33887DWB/R2
MCZ33887EK/R2
54 SOICW-EP
6.0 V
MCU
IN
OUT
OUT
OUT
OUT
OUT
A/D
CCP
FS
EN
IN1
IN2
D1
D2
FB
33887
V+
OUT1
OUT2
PGND
AGND
V+
MOTOR
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. All rights reserved.