KIT33932VWEVBE Freescale Semiconductor, KIT33932VWEVBE Datasheet - Page 16

• Manufacturer Part Number: KIT33932VWEVBE
• Description: KIT EVALUATION FOR MC33932
• Manufacturer: Freescale Semiconductor
• Type: MOSFET & Power Driverr

Specifications of KIT33932VWEVBE

• Main Purpose: Power Management, Motor Control
• Embedded: No
• Utilized Ic / Part: MC33932
• Primary Attributes: 1 H-Bridge Driver
• Secondary Attributes: USB, I2C, SPI Interface
• Interface Type: USB, SPI
• Product: Power Management Modules
• Silicon Manufacturer: Freescale
• Silicon Core Number: MC33932
• Kit Application Type: Power Management
• Application Sub Type: Switch
• Kit Contents: Evaluation Board, CD, Misc Cables
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: MC33932

SHORT-CIRCUIT PROTECTION
outputs tri-state (latch-OFF) independent of the input (IN1
and IN2) states, and the fault status output flag (SF) is SET
to logic LOW. If the D1 input changes from logic HIGH to logic
LOW, or if the EN/D2 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.
by the input pins (IN1, IN2, D1, and EN/D2), provided the
device junction temperature is within the specified operating
temperature range.
INTERNAL PWM CURRENT LIMITING
conditions should be less than 5.0 A. The instantaneous load
currents will be limited to I
limiting circuitry. When the I
reached, the output stages are tri-stated for a fixed time (T
of 20 µs typical. Depending on the time constant associated
with the load characteristics, the output current decreases
during the tri-state duration until the next output ON cycle
occurs.
device junction temperature. When - 40°C < T
between the specified minimum/maximum values. When T
exceeds 160°C, the I
above 175°C the device over-temperature circuit will detect
T
feature implements a graceful degradation of operation
before thermal shutdown occurs, thus allowing for
intermittent unexpected mechanical loads on the motor’s
gear-reduction train to be handled.
permitted only for non-repetitive durations < 30 seconds.
Provision must be made at the system level to prevent
prolonged operation in the current-foldback region.
16
33932
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSTIC FEATURES
LIM
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 PWM current limit threshold value is dependent on the
Important Die temperature excursions above 150°C are
and an over-temperature shutdown will occur. This
LIM
threshold decreases to 4.2A. Shortly
LIM
LIM
via the internal PWM current
threshold current value is
PROTECTION AND DIAGNOSTIC FEATURES
J
< 160°C, I
LIM
A
is
J
)
OVER-TEMPERATURE SHUTDOWN AND
HYSTERESIS
are tri-stated (latched-OFF) and the fault status flag (SF) is
SET to logic LOW.
HIGH to logic LOW, or EN/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 over-temperature threshold limit minus the hysteresis.
Important Resetting from the fault condition will clear the
fault status flag. Powering down and powering up the device
will also reset the 33932 from the fault condition.
OUTPUT AVALANCHE PROTECTION
would likely tri-state simultaneously due to the disable logic.
This could result in an unclamped inductive discharge. The
VPWR input to the 33932 should not exceed 40 V during this
transient condition, to prevent electrical overstress of the
output drivers.This can be accomplished with a zener clamp
or MOV, and/or an appropriately valued input capacitor with
sufficiently low ESR (see
V PW R
If an over-temperature condition occurs, the power outputs
To reset from this condition, D1 must change from logic
If VPWR were to become an open circuit, the outputs
Low ESR
Figure 13. Avalanche Protection
Cap.
Bulk
100nF
Analog Integrated Circuit Device Data
9
Figure
VPW R
I/Os
13).
AGND
Freescale Semiconductor
OUT2
PGND
OUT1
M