MC33886VW Freescale, MC33886VW Datasheet - Page 15

• Manufacturer Part Number: MC33886VW
• Manufacturer: Freescale

Specifications of MC33886VW

• Operating Current: 20mA
• Operating Temperature Classification: Automotive
• Package Type: HSOP
• Operating Supply Voltage (min): 5V
• Operating Supply Voltage (max): 40V
• Lead Free Status / RoHS Status: Compliant

torque, direction, dynamic braking, and PWM control), in
addition to the 5.0 A current capability, make the 33886 a
very attractive, cost-effective solution for controlling a broad
range of fractional horsepower DC motors. A pair of 33886
devices can be used to control bipolar stepper motors in both
directions. In addition, the 33886 can be used to control
permanent magnet solenoids in a push-pull variable force
fashion using PWM control. The 33886 can also be used to
excite transformer primary windings with a switched square
wave to produce secondary winding AC currents.
page 2, the 33886 is a fully protected monolithic H-Bridge
with Fault Status reporting. For a DC motor to run the input
conditions need be as follows: D1 input logic Low, D2 input
logic High, FS flag cleared (logic High), with one IN logic Low
and the other IN logic High to define output polarity. The
33886 can execute dynamic braking by simultaneously
turning on either both high-side MOSFETs or both low-side
MOSFETs in the output H-Bridge; e.g., IN1 and IN2 logic
High or IN1 and IN2 logic Low.
DC load current of 5.0 A from a 40 V V+ source. An internal
charge pump supports PWM frequencies up to 10 kHz. An
POWER/ANALOG GROUNDS (PGND AND AGND)
ground pins should be connected together with a very low
impedance connection.
POSITIVE POWER SUPPLY (V+)
pins must be connected together on the printed circuit board
with as short as possible traces offering as low impedance as
possible between pins.
voltage drops below a V+ undervoltage threshold, the output
power stage switches to a tri-state condition and the fault
status flag is set and the Fault Status pin voltage switched to
a logic Low. When the supply voltage returns to a level that is
above the threshold, the power stage automatically resumes
normal operation according to the established condition of
the input pins and the fault status flag is automatically reset
logic High.
Analog Integrated Circuit Device Data
Freescale Semiconductor
Numerous protection and operational features (speed,
As shown in
The 33886 outputs are capable of providing a continuous
Power and analog ground pins. The power and analog
V+ pins are the power supply inputs to the device. All V+
V+ pins have an undervoltage threshold. If the supply
Figure
2, Simplified Internal Block Diagram,
FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
INTRODUCTION
external pull-up resistor is required for the open drain FS pin
for fault status reporting.
the two totem-pole half-bridge outputs. Two disable inputs
(D1 and D2) are for forcing the H-Bridge outputs to a high
impedance state (all H-Bridge switches OFF).
recovery, active current limiting, output short-circuit latch-
OFF, and overtemperature latch-OFF. An undervoltage
shutdown, output short circuit latch-OFF, or overtemperature
latch-OFF fault condition will cause the outputs to turn OFF
(i.e., become high impedance or tri-stated) and the fault
output flag to be set Low. Either of the Disable inputs or V+
must be “toggled” to clear the fault flag.
unique and best described as using a junction temperature-
dependent active current “fold back” protection scheme.
When a short circuit condition is experienced, the current
limited output is “ramped down” as the junction temperature
increases above 160°C, until at 175°C the current has
decreased to about 2.5 A. Above 175°C, overtemperature
shutdown (latch-OFF) occurs. This feature allows the device
to remain in operation for a longer time with unexpected
loads, while still retaining adequate protection for both the
device and the load.
FAULT STATUS (FS)
active Low open drain structure requiring a pull-up resistor to
5.0 V. Refer to
LOGIC INPUT 1, 2 AND DISABLE1, 2 (IN1, IN2, D1,
AND D2)
outputs. These pins are 5.0 V CMOS-compatible inputs with
hysteresis. The IN1 and IN2 independently control OUT1 and
OUT2, respectively. D1 and D2 are complimentary inputs
used to tri-state disable the H-Bridge outputs.
Low) in the disable state, outputs OUT1 and OUT2 are both
tri-state disabled; however, the rest of the device circuitry is
fully operational and the supply I
to a few milliamperes. Refer to
Static Electrical Characteristics
Two independent inputs (IN1 and IN2) provide control of
The 33886 has undervoltage shutdown with automatic
The short circuit / overtemperature shutdown scheme is
This pin is the device fault status output. This output is an
These pins are input control pins used to control the
When either D1 or D2 is set (D1 = logic High or D2 = logic
Table 5, Truth
Table, page 12.
Table 5, Truth
table, page 5.
Q (standby)
FUNCTIONAL DESCRIPTION
current is reduced
INTRODUCTION
Table, and
33886
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