5.0 A H-Bridge with Load
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
The 33887 is parametrically specified over a temperature range
of -40°C ≤ TA ≤ 125°C and a voltage range of 5.0 V ≤ V+ ≤ 28 V. The
IC can also be operated up to 40 V with derating of the
• 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)
• 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.
Rev 10.0, 07/2005
5.0 A H-BRIDGE
VW (Pb-FREE) SUFFIX
PNB (Pb-FREE) SUFFIX
-40°C to 125°C
Figure 1. 33887 Simplified Application Diagram
There are no disclaimers required on the Final publication of a data sheet.
© Freescale Semiconductor, Inc., 2005. All rights reserved.