LM5020MM-1 National Semiconductor, LM5020MM-1 Datasheet

Pulse Width Modulation (PWM) Controller IC

LM5020MM-1

Manufacturer Part Number

LM5020MM-1

Description

Pulse Width Modulation (PWM) Controller IC

Manufacturer

National Semiconductor

Datasheets

1.LM5020MM-1.pdf (13 pages)

2.LM5020MM-1.pdf (12 pages)

3.LM5020MM-1.pdf (12 pages)

Specifications of LM5020MM-1

Peak Reflow Compatible (260 C)

Supply Voltage Max

100V

Leaded Process Compatible

Package / Case

10-SOIC

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM5020MM-1

Manufacturer:

NS/国半

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM5020MM-1/NOPB

Manufacturer:

Quantity:

15 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM5020MM-1/NOPB

Manufacturer:

NSC

Quantity:

3 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM5020MM-1/NOPB

Manufacturer:

NS/国半

Quantity:

20 000

Company:

Amily Shenzhen XNWY Technology Co., Ltd

Part Number:

LM5020MM-1/NOPB

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Download datasheet (624Kb)

LM5020

100V Current Mode PWM Controller

General 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 in-

herent 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. Addi-

tional 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.

Typical Application Circuit

DS200950

Non-Isolated Flyback Converter

Features

n Internal Start-up Bias Regulator

n Error Amplifier

n Precision Voltage Reference

n Programmable Softstart

n 1A Peak Gate Driver

n Maximum Duty Cycle Limiting (80% for LM5020-1 or

n Programmable Line Under Voltage Lockout (UVLO) with

n Cycle-by-Cycle Over-Current Protection

n Slope Compensation (LM5020-1)

n Programmable Oscillator Frequency with

n Current Sense Leading Edge Blanking

n Thermal Shutdown Protection

Applications

n Telecommunication Power Converters

n Industrial Power Converters

n +42V Automotive Systems

Packages

n MSOP-10

n LLP-10 (4 mm x 4 mm)

50% for LM5020-2)

Adjustable Hysteresis

Synchronization Capability

20095013

www.national.com

April 2006

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