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LM9061N Datasheet

  • LM9061N

  • Power MOSFET Driver with Lossless Protection

  • 14頁

  • NSC

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LM9061 Power MOSFET Driver with Lossless Protection
April 1995
LM9061
Power MOSFET Driver with Lossless Protection
General Description
The LM9061 is a charge-pump device which provides the
gate drive to any size external power MOSFET configured
as a high side driver or switch A CMOS logic compatible
ON OFF input controls the output gate drive voltage In the
ON state the charge pump voltage which is well above the
available V
CC
supply is directly applied to the gate of the
MOSFET A built-in 15V zener clamps the maximum gate to
source voltage of the MOSFET When commanded OFF a
110
mA
current sink discharges the gate capacitances of
the MOSFET for a gradual turn-OFF characteristic to mini-
mize the duration of inductive load transient voltages and
further protect the power MOSFET
Lossless protection of the power MOSFET is a key feature
of the LM9061 The voltage drop (V
DS
) across the power
device is continually monitored and compared against an
externally programmable threshold voltage A small current
sensing resistor in series with the load which causes a loss
of available energy is not required for the protection circuit-
ry Should the V
DS
voltage due to excessive load current
exceed the threshold voltage the output is latched OFF in a
more gradual fashion (through a 10
mA
output current sink)
after a programmable delay time interval
Designed for the automotive application environment the
LM9061 has a wide operating temperature range of
b
40 C
to
a
125 C remains operational with V
CC
up to 26V and
can withstand 60V power supply transients The LM9061 is
available in an 8-pin small outline package and an 8-pin
dual in-line package
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Built-in charge pump for gate overdrive of high side
drive applications
Lossless protection of the power MOSFET
Programmable MOSFET protection voltage
Programmable delay of protection latch-OFF
Fast turn-ON (1 5 ms max with gate capacitance of
25000 pF)
Undervoltage shut OFF with V
CC
k
7V
Overvoltage shut OFF with V
CC
l
26V
Withstands 60V supply transients
CMOS logic compatible ON OFF control input
Surface mount and dual in-line packages available
Applications
Y
Y
Y
Y
Y
Valve relay and solenoid drivers
Lamp drivers
DC motor PWM drivers
Logic controlled power supply distribution switch
Electronic circuit breaker
Typical Application
Connection Diagrams
TL H 12317 鈥?3
Top View
Order Number LM9061M
See NS Package Number M08A
TL H 12317 鈥?1
TL H 12317 鈥?2
Top View
Order Number LM9061N
See NS Package Number N08E
C
1995 National Semiconductor Corporation
TL H 12317
RRD-B30M115 Printed in U S A

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