LM9061
www.ti.com
SNOS738F –APRIL 1995–REVISED APRIL 1995
LM9061 Power MOSFET Driver with Lossless Protection
Check for Samples: LM9061
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FEATURES
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 VCC 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 µA current sink discharges the gate capacitances
of the MOSFET for a gradual turn-OFF characteristic
to minimize the duration of inductive load transient
voltages and further protect the power MOSFET.
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Built-In Charge Pump for Gate Overdrive of
High Side Drive Applications
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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)
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Overvoltage Shut OFF with VCC > 26V
Withstands 60V Supply Transients
CMOS Logic Compatible ON/OFF Control Input
Available in 8-pin SOIC (SO-8) Package
Lossless protection of the power MOSFET is a key
feature of the LM9061. The voltage drop (VDS) 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 circuitry.
Should the VDS voltage, due to excessive load
current, exceed the threshold voltage, the output is
latched OFF in a more gradual fashion (through a 10
µA output current sink) after programmable delay
time interval.
APPLICATIONS
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Valve, Relay and Solenoid Drivers
Lamp Drivers
DC Motor PWM Drivers
Logic Controlled Power Supply Distribution
Switch
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Electronic Circuit Breaker
The LM9061 has a wide operating temperature range
of −40°C to +125°C, remains operational with VCC up
to 26V, and can withstand 60V power supply
transients. The LM9061 is available in an 8-pin small
outline surface mount package.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1995, Texas Instruments Incorporated