MC33887AVW Freescale Semiconductor, MC33887AVW Datasheet - Page 24

• Manufacturer Part Number: MC33887AVW
• Description: IC H-BRIDGE LOAD CURR FB 20-HSOP
• Manufacturer: Freescale Semiconductor

Specifications of MC33887AVW

• Applications: DC Motor Controller, H Bridge
• Number Of Outputs: 1
• Current - Output: 5A
• Voltage - Supply: 5 V ~ 28 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-HSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -

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
output bridge will become operational again and the fault
status flag will be reset (cleared) to a logic HIGH state.
by the input pins (IN1, IN2, D1, and
junction temperature is within the specified operating
temperature range.
ACTIVE CURRENT LIMITING
conditions is internally limited to I
the maximum current value is reached, the output stages are
tri-stated for a fixed time (t
the time constant associated with the load characteristics, the
current decreases during the tri-state duration until the next
output ON cycle occurs (see
page 15, respectively).
device junction temperature. When -40°C ≤ T
is between 5.2 A to 7.8 A. When T
current decreases linearly down to 4.0 A typical at 175°C.
Above 175°C the device overtemperature circuit detects T
24
33887
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSTIC FEATURES
If an output short circuit condition is detected, the power
The output stage will always switch into the mode defined
The maximum current flow under normal operating
The current limiting threshold value is dependent upon the
D2
input changes from logic LOW to logic HIGH, the
a
) of 20 μs typical. Depending on
Figures 11
LIM
J
D2
exceeds 160°C, the I
(5.2 A to 7.8 A). When
PROTECTION AND DIAGNOSTIC FEATURES
), provided the device
and 14, page
J
≤ 160°C, I
13
and
LIM
LIM
LIM
and overtemperature shutdown occurs (see
page 12). 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.
Output Avalanche Protection
suddenly disabled and V+ is lost, could result in electrical
overstress of the drivers. To prevent this the V+ input to the
33887 should not exceed the maximum rating during a fly-
back condition. This may be done with either a zener clamp
and/or an appropriately valued input capacitor with
sufficiently low ESR.
OVERTEMPERATURE SHUTDOWN AND
HYSTERESIS
are tri-stated (latched-OFF) and the fault status flag is SET to
logic LOW.
HIGH to logic LOW, or
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.
An inductive fly-back event, namely when the outputs are
If an overtemperature condition occurs, the power outputs
To reset from this condition, D1 must change from logic
Note Resetting from the fault condition will clear the fault
Analog Integrated Circuit Device Data
D2
must change from logic LOW to
Freescale Semiconductor
Figure
9,