LM5020

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SNVS275F – MAY 2004 – REVISED APRIL 2006

LM5020 100V Current Mode PWM Controller

Check for Samples: LM5020

1

FEATURES

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Programmable Oscillator Frequency with

Synchronization Capability

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Internal Start-up Bias Regulator

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Current Sense Leading Edge Blanking

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Error Amplifier

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Thermal Shutdown Protection

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Precision Voltage Reference

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Programmable Softstart

APPLICATIONS

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1A Peak Gate Driver

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Telecommunication Power Converters

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Maximum Duty Cycle Limiting (80% for

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Industrial Power Converters

LM5020-1 or 50% for LM5020-2)

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+42V Automotive Systems

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Programmable Line Under Voltage Lockout

(UVLO) with Adjustable Hysteresis

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Cycle-by-Cycle Over-Current Protection

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Slope Compensation (LM5020-1)

DESCRIPTION

The LM5020 high voltage pulse-width-modulation (PWM) controller contains all of the features needed to

implement single ended primary power converter topologies. Output voltage regulation is based on current-mode

control, which eases the design of loop compensation while providing inherent line feed-forward. The LM5020

includes a high-voltage start-up regulator that operates over a wide input range up to 100V. The PWM controller

is designed for high speed capability including an oscillator frequency range to 1MHz and total propagation

delays less than 100ns. Additional features include an error amplifier, precision reference, line under-voltage

lockout, cycle-by-cycle current limit, slope compensation, softstart, oscillator synchronization capability and

thermal shutdown. The controller is available in both MSOP-10 and LLP-10 packages.

Packages

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MSOP-10

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LLP-10 (4 mm x 4 mm)

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2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2006, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.