n LINEAR CURRENT LIMITATION
n THERMAL SHUT DOWN
n SHORT CIRCUIT PROTECTION
n INTEGRATED CLAMP
n LOW CURRENT DRAWN FROM INPUT PIN
n DIAGNOSTIC FEEDBACK THROUGH INPUT
CLAMP
42 V20 mΩ49 A
PIN
n ESD PROTECTION
n DIRECT ACCESS TO THE GATE OF THE
POWER MOSFET (ANALOG DRIVING)
n COMPATIBLE WITH STANDARD POWER
MOSFET
DESCRIPTION
The VNP49N04FI, VNB49N04, VNV49N04 are
monolithicdevicesdesignedin
STMicroelectronicsVIPowerM0Technology,
intended for replacement of standard Power
MOSFETS from DC up to 50KHz applications.
Built-in thermal shutdown, linear current limitation
and overvoltage clamp protect the chip in harsh
environments.
Fault feedback can be detected by monitoring the
voltage at the input pin.
10
PowerSO-10
VNV49N04
1
TM
BLOCK DIAGRAM
DRAIN
Overvoltage
Clamp
INPUT
October 19991/14
Gate
Control
Linear
Current
Limiter
Over
Temperature
Status
SOURCE
1
VNP49N04FI / VNB49N04 / VNV49N04
ABSOLUTE MAXIMUM RATING
SymbolParameter
V
DS
V
IN
I
D
I
R
V
ESD
P
tot
T
T
T
stg
CONNECTION DIAGRAM (TOP VIEW)
Drain-source Voltage (VIN=0V)Internally ClampedV
Input Voltage18V
Drain CurrentInternally LimitedA
Reverse DC Output Current-50A
Electrostatic Discharge (R=1.5KΩ, C=100pF)2000V
Total Dissipation at Tc=25°C12512540W
Operating Junction TemperatureInternally limited°C
During normal operation, the INPUT pin is
electrically connected to the gate of the internal
power MOSFET. The device then behaves like a
standard power MOSFET and can be used as a
switch from DC up to 50KHz. The only difference
from the user’s standpoint is that a small DC
current (I
supply the internal circuitry.
) flows into the INPUT pin in order to
ISS
The device integrates:
- OVERVOLTAGE CLAMP PROTECTION:
internally set at 42V, along with the rugged
avalanche characteristics of the Power MOSFET
stage give this device unrivalled ruggedness and
energy handling capability. This feature is mainly
important when driving inductive loads.
- LINEAR CURRENT LIMITER CIRCUIT:
limits the drain current IDto I
INPUT pin voltage. When the current limiter is
whatever the
LIM
active, the device operates in the linear region, so
power dissipation may exceed the capability ofthe
heatsink. Both case and junction temperatures
increase, and if this phase lasts long enough,
VNP49N04FI / VNB49N04 / VNV49N04
junctiontemperaturemayreachthe
overtemperature threshold T
- OVERTEMPERATURE AND SHORT CIRCUIT
PROTECTION:
these are based on sensing the chip temperature
and are not dependent on the input voltage. The
location of the sensing element on the chip in the
power stage areaensures fast, accuratedetection
of the junction temperature. Overtemperature
cutout occurs at minimum 150°C. The device is
automatically restarted when the chiptemperature
falls below 135°C.
- STATUS FEEDBACK:
in the caseof an overtemperaturefaultcondition, 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
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 drivenfrom a TTL Logic
circuit (with a small increase in R
jsh
.
DS(ON)
Ω.
The
).
5/14
1
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