MC33886 Motorola, MC33886 Datasheet - Page 16

• Manufacturer Part Number: MC33886
• Description: 5.0 A H BRIDGE
• Manufacturer: Motorola

OUT1 and OUT2
integrated output FET body diodes. The bridge output is
controlled using the IN1, IN2, D1, and D2 inputs. The outputs
have active current limiting above 6.5 A. The outputs also have
thermal shutdown (tri-state latch-OFF) with hysteresis as well
as short circuit latch-OFF protection.
are higher than active current limit is activated at each output
activation to facilitate detecting hard output short conditions
(see
Short Circuit Protection
outputs tri-state (latch-OFF) independent of the input (IN1 and
IN2) states, and the fault status output flag is set logic Low. If
the D1 input changes from logic High to logic Low, or if the
input changes from logic Low to logic High, the output bridge
will become operational again and the fault status flag will be
reset (cleared) to a logic High state.
the input terminals (IN1, IN2, D1, and D2), provided the device
junction temperature is within the specified operating
temperature.
Active Current Limiting
conditions is internally limited to I
maximum current value is reached, the output stages are tri-
stated for a fixed time (t
time constant associated with the load characteristics, the
current decreases during the tri-state duration until the next
output ON cycle occurs (see
page 12, respectively).
device junction temperature. When -40°C < T
between 5.2 A and 7.8 A. When T
current decreases linearly down to 2.5 A typical at 175°C.
Above 175°C the device overtemperature circuit detects T
and overtemperature shutdown occurs (see
This feature allows the device to remain operational for a longer
time but at a regressing output performance level at junction
temperatures above 160°C.
33886
16
These terminals are the outputs of the H-Bridge with
A disable timer (time t
If an output short circuit condition is detected, the power
The output stage will always switch into the mode defined by
The maximum current flow under normal operating
The current limiting threshold value is dependent upon the
Figure
7, page 9).
a
b
) of 20 µs typical. Depending on the
) incorporated to detect currents that
Figures 7
LIM
J
exceeds 160°C, the I
(5.2 A to 7.8 A). When the
and 13, page 9 and
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure
J
< 160°C, I
PERFORMANCE FEATURES
5, page 8).
Go to: www.freescale.com
LIM
LIM
LIM
D2
is
C
can be connected from the
can operate without the external capacitor, although the
capacitor helps to reduce noise and allows the device to
perform at maximum speed, timing, and PWM frequency.
Overtemperature Shutdown and Hysteresis
are tri-state (latched-OFF) independent of the input signals and
the fault status flag is set logic Low.
to logic Low, or D2 must change from logic Low to logic High.
When reset, the output stage switches ON again, provided that
the junction temperature is now below the overtemperature
threshold limit minus the hysteresis.
status flag.
Main Differences Compared to MC33186DH1
CP
Charge pump output terminal. A filter capacitor (up to 33 nF)
If an overtemperature condition occurs, the power outputs
To reset from this condition, D1 must change from logic High
Note Resetting from the fault condition will clear the fault
• COD terminal has been removed. Terminal 8 is now a Do
• Terminal 20 is no longer connected in the 20 HSOP
• R
• Maximum temperature operation is now 160°C, as
• Current regulation limiting foldback is implemented above
• Thermal resistance junction to case has been increased
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
Not Connect (DNC) terminal.
package. It is now a DNC terminal.
transistor.
minimum thermal shutdown temperature has increased.
160°C T
from ~2.0°C/W to ~5.0°C/W.
DS(ON)
max at T
J
.
J
= 150°C is now 225 mΩ per each output
C
CP
terminal and PGND. The device
C
CP