ANALOG
PRODUCTS
POWER ICs
MC33887 POWER H-BRIDGE DRIVER WITH SLEEPMODE
The MC33887 is a monolithic power IC comprising control logic, charge pump, gate drive,
and low R
DS(on)
MOSFET output H-Bridge circuitry into a small surface mount package. It is
designed to drive inductive loads with RMS currents up to 5.2 A in both directions. In addi-
tion, the current drive can be pulse width modulated (PWM) at frequencies up to 20 kHz. An
internal current mirror circuit provides a proportional (1/400
th
) sample of the output current,
which may be used to provide feedback or load information to a microcontroller鈥檚 A/D input.
Under voltage, over tempera-
ture, and over current condi-
tions are detected and reported
via a status flag output. Output
control is via two independent
inputs (each half of the bridge
may be utilized as an inde-
pendent totem pole output).
Enables can place the bridge
into sleep mode (<25 碌A(chǔ)).
Typical applications include:
DC-motor acme lead screw
actuators, servo gear actuators,
bi-directional thrust solenoids,
and fractional horsepower DC-
motor control.
Simplified Application Diagram
VPWR
MC33887
VPWR
CP
OUT1
Motor
MCU
FDBK
IN1
IN2 OUT2
DI1
GND
DI2
EN
SF
APPLICATIONS
鈥?Automotive Systems
鈥?DC-Motor Control in
Industrial and Robotic
Systems
鈥?DC-Motor and
Actuator Control in
Boats, RV鈥檚 and
Marine Systems
鈥?Appliance and White
Goods Electrical
Actuators
鈥?Powered Machine and
Hand Tools
鈥?Antenna Rotors or
Dish Positioning
Systems
CUSTOMER BENEFITS
鈥?Easiest way to interface a microcontroller to a DC-motor
鈥?Simplified system design
鈥?Built-in current limiting
鈥?Built-in thermal shutdown
鈥?Versatile output control (each half of H-Bridge is
independently controllable)
鈥?Reduced board space
鈥?Enhanced reliability
Performance
Outputs
RMS Current
R
DS(on)
@ 25擄C
Operating Voltage
Peak Current
Load Dump Transient
Switching Time
ESD
Operating Temp
Junction Operating Temp
Typical Values
2
5.2 A
120 m鈩?/div>
5.0 鈥?28 V
8.0 A each output
+40 V
8 碌S
2000 V
-40擄C 鈮?T
A
鈮?125擄C
-40擄C 鈮?T
J
鈮?150擄C
H-BRIDGE
MC33887
FACT SHEET
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