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Motorola Electronic Components Datasheet

MC33887 Datasheet

5.0 A H-Bridge with Load Current Feedback

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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 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 5.0 V 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 mRDS(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.
MC33887
Rev 10.0, 07/2005
33887
5.0 A H-BRIDGE
DH SUFFIX
VW (Pb-FREE) SUFFIX
98ASH70273A
20-TERMINAL HSOP
PNB (Pb-FREE) SUFFIX
98ASA10583D
36-TERMINAL PQFN
Bottom View
DWB SUFFIX
98ASA10506D
54-TERMINAL SOICW-EP
ORDERING INFORMATION
Device
MC33887DH/R2
PC33887VW/R2
MC33887PNB/R2
Temperature
Range (TA)
-40°C to 125°C
Package
20 HSOP
36 PQFN
MC33887DWB/R2
54 SOICW-EP
5.0 V
33887
V+
CCP V+
IN
OUT
MCU
OUT
OUT
OUT
OUT
A/D
OUT1
FS
MOTOR
EN
IN1 OUT2
IN2
D1 PGND
D2
FB AGND
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.
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Motorola Electronic Components Datasheet

MC33887 Datasheet

5.0 A H-Bridge with Load Current Feedback

No Preview Available !

INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
CCP
VPWR
EN Charge Pump
80 uA
(each)
5.0 V
Regulator
IN1
IN2 Gate Drive
D1
D2
25 uA
Control
Logic
Over
Temperature
FS Undervoltage
FB
Current Limit,
Overcurrent
Sense, &
Feedback
Circuit
AGND
PGND
Figure 2. 33887 Simplified Internal Block Diagram
OUT1
OUT2
33887
2
Analog Integrated Circuit Device Data
Freescale Semiconductor


Part Number MC33887
Description 5.0 A H-Bridge with Load Current Feedback
Maker Motorola
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MC33887 Datasheet PDF






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