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MLP2N06CL Datasheet(PDF) 3 Page - ON Semiconductor

Part No. MLP2N06CL
Description  SMARTDISCRETES TM MOSFET 2 Amps, 62 Volts, Logic Level N?묬hannel TO??20
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MLP2N06CL Datasheet(HTML) 3 Page - ON Semiconductor

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MLP2N06CL
http://onsemi.com
3
THE SMARTDISCRETES CONCEPT
From a standard power MOSFET process, several active
and passive elements can be obtained that provide on−chip
protection to the basic power device. Such elements require
only a small increase in silicon area and/or the addition of one
masking layer to the process. The resulting device exhibits
significant improvements in ruggedness and reliability as
well as system cost reduction. The SMARTDISCRETES
device functions can now provide an economical alternative
to smart power ICs for power applications requiring low
on−resistance, high voltage and high current.
These devices are designed for applications that require a
rugged power switching device with short circuit protection
that can be directly interfaced to a microcontroller unit
(MCU). Ideal applications include automotive fuel injector
driver, incandescent lamp driver or other applications where
a high in−rush current or a shorted load condition could occur.
OPERATION IN THE CURRENT LIMIT MODE
The amount of time that an unprotected device can
withstand the current stress resulting from a shorted load
before its maximum junction temperature is exceeded is
dependent upon a number of factors that include the amount
of heatsinking that is provided, the size or rating of the device,
its initial junction temperature, and the supply voltage.
Without some form of current limiting, a shorted load can
raise a device’s junction temperature beyond the maximum
rated operating temperature in only a few milliseconds.
Even with no heatsink, the MLP2N06CL can withstand a
shorted load powered by an automotive battery (10 to 14 V)
for almost a second if its initial operating temperature is under
100
°C. For longer periods of operation in the current−limited
mode, device heatsinking can extend operation from several
seconds to indefinitely depending on the amount of
heatsinking provided.
SHORT CIRCUIT PROTECTION AND THE EFFECT OF
TEMPERATURE
The on−chip circuitry of the MLP2N06CL offers an
integrated means of protecting the MOSFET component
from high in−rush current or a shorted load. As shown in the
schematic diagram, the current limiting feature is provided
by an NPN transistor and integral resistors R1 and R2. R2
senses the current through the MOSFET and forward biases
the NPN transistor’s base as the current increases. As the
NPN turns on, it begins to pull gate drive current through R1,
dropping the gate drive voltage across it, and thus lowering
the voltage across the gate−to−source of the power
MOSFET and limiting the current. The current limit is
temperature dependent as shown in Figure 3, and decreases
from about 2.3 A at 25
°C to about 1.3 A at 150°C.
Since the MLP2N06CL continues to conduct current and
dissipate power during a shorted load condition, it is
important to provide sufficient heatsinking to limit the device
junction temperature to a maximum of 150
°C.
The metal current sense resistor R2 adds about 0.4
W to the
power
MOSFET’s on−resistance,
but the
effect
of
temperature on the combination is less than on a standard
MOSFET due to the lower temperature coefficient of R2. The
on−resistance variation with temperature for gate voltages of
4 and 5 V is shown in Figure 5.
Back−to−back polysilicon diodes between gate and source
provide ESD protection to greater than 2 kV, HBM. This
on−chip protection feature eliminates the need for an external
Zener diode for systems with potentially heavy line transients.
Figure 3. ID(lim) Variation With Temperature
Figure 4. RDS(on) Variation With
Gate−To−Source Voltage
TJ, JUNCTION TEMPERATURE (°C)
VGS = 5 V
VDS = 10 V
−50
0
50
100
150
5
4
3
2
1
0
6
VGS, GATE−TO−SOURCE VOLTAGE (VOLTS)
ID = 1 A
01
2
3
9
10
1.0
0.8
0.6
0.4
0.2
0
45
6
78
TJ = −50°C
100
°C
25
°C


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