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MC33887DHFSLN/a1200avai5.0 A H-Bridge with Load Current Feedback
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MC33887DH-MC33887DWB-MC33887DWBR2-MC33887PNB-MC33887PNBR2
5.0 A H-Bridge with Load Current Feedback
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33887
Rev 9.0, 10/20045.0 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 RDS(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 terminal 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≤ TA ≤ 125°C and a voltage range of 5.0V≤V+≤28 V. The IC can also
be operated up to 40 V with derating of the specifications.
Features
5.0 V to 40 V Continuous Operation 120 mΩ RDS(ON) H-Bridge MOSFETs TTL/CMOS Compatible Inputs PWM Frequencies up to 10 kHz Active Current Limiting (Regulation) via Internal Constant OFF-Time
PWM (with Temperature-Dependent Threshold Reduction) Output Short Circuit Protection (Short to V+ or Short to GND) Undervoltage Shutdown 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 PNB
ORDERING INFORMATION

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