VNP28N04FI Ver la hoja de datos (PDF) - STMicroelectronics
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VNP28N04FI Datasheet PDF : 13 Pages
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VNP28N04FI-VNB28N04-VNV28N04
PROTECTION FEATURES
During normal operation, the Input pin is - OVERTEMPERATURE AND SHORT CIRCUIT
electrically connected to the gate of the internal
PROTECTION: these are based on sensing
power MOSFET. The device then behaves like a
the chip temperature and are not dependent on
standard power MOSFET and can be used as a
the input voltage. The location of the sensing
switch from DC to 50 KHz. The only difference
element on the chip in the power stage area
from the user’s standpoint is that a small DC
ensures fast, accurate detection of the junction
current (Iiss) flows into the Input pin in order to
supply the internal circuitry.
temperature. Overtemperature cutout occurs at
minimum 150oC. The device is automatically
The device integrates:
restarted when the chip temperature falls
- OVERVOLTAGE CLAMP PROTECTION:
internally set at 42V, along with the rugged
t(s) avalanche characteristics of the Power
MOSFET stage give this device unrivalled
c ruggedness and energy handling capability.
du This feature is mainly important when driving
ro inductive loads.
P - LINEAR CURRENT LIMITER CIRCUIT: limits
the drain current Id to Ilim whatever the Input
te pin voltage. When the current limiter is active,
le the device operates in the linear region, so
o power dissipation may exceed the capability of
bs the heatsink. Both case and junction
temperatures increase, and if this phase lasts
- O long enough, junction temperature may reach
Obsolete Product(s) the overtemperaturethreshold Tjsh.
below 135oC.
- STATUS FEEDBACK: In the case of an
overtemperature fault condition, a Status
Feedback is provided through the Input pin.
The internal protection circuit disconnects the
input from the gate and connects it instead to
ground via an equivalent resistance of 100 Ω.
The failure can be detected by monitoring the
voltage at the Input pin, which will be close to
ground potential.
Additional features of this device are ESD
protection according to the Human Body model
and the ability to be driven from a TTL Logic
circuit (with a small increase in RDS(on)).
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