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LM9061, LM9061-Q1

SNOS738H – APRIL 1995 – REVISED JANAURY 2015

LM9061/-Q1 High-Side Protection Controller

1 Features

3 Description

The LM9061 is a charge-pump device which provides

1

•

Qualified for Automotive Applications

the gate drive to an external power MOSFET of any

•

AEC-Q100 Qualified With the Following Results:

size configured as a high-side driver or switch. This

–

Device HBM ESD Classification Level 2

includes multiple parallel connected MOSFETs for

very

high

current

applications.

A

CMOS

logic

–

Device CDM ESD Classification Level C4B

compatible ON/OFF input controls the output gate

•

Withstands 60-V Supply Transients

drive voltage. In the ON state, the charge pump

•

is directly applied to the gate of the MOSFET. A built-

•

Lossless Overcurrent Protection Latch-OFF

in 15-V Zener clamps the maximum gate to source

–

Current Sense Resistor is Not Required

voltage of the MOSFET. When commanded OFF a

–

Minimizes Power Loss With High Current

110-µA current sink discharges the gate capacitances

Loads

of the MOSFET for a gradual turn-OFF characteristic

to minimize the duration of inductive load transient

•

Programmable Delay of Protection Latch-OFF

voltages and further protect the power MOSFET.

•

Gradual turn-OFF to Minimize Inductive Load

Transient Voltages

Lossless protection of the power MOSFET is a key

•

CMOS Logic Compatible ON/OFF Control Input

the power device is continually monitored and

compared

against

an

externally

programmable

2 Applications

threshold voltage. A small current sensing resistor in

•

Transmission Control Unit (TCU)

series with the load, which causes a loss of available

energy, is not required for the protection circuitry. If

•

Engine Control Unit (ECU)

•

Valve, Relay and Solenoid Drivers

exceeds the threshold voltage, the output is latched

•

Lamp Drivers

OFF in a more gradual fashion (through a 10-µA

•

DC Motor PWM Drivers

output current sink) after a programmable delay time

interval.

•

Logic-Controlled Power Supply Distribution Switch

•

Electronic Circuit Breaker

Device Information(1)

•

High-Power Audio Speakers

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM9061/-Q1

SOIC (8)

4.9 mm × 3.91 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

High-Side Driving and Protection to a Connected Load

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.