LM5020_14 Datasheet, PDF (1/19 Pages) Texas Instruments – 100V Current Mode PWM Controller

LM5020
www.ti.com
SNVS275F – MAY 2004 – REVISED APRIL 2006
LM5020 100V Current Mode PWM Controller
Check for Samples: LM5020
FEATURES
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•2 Internal Start-up Bias Regulator
• Error Amplifier
• Precision Voltage Reference
• Programmable Softstart
• 1A Peak Gate Driver
• Maximum Duty Cycle Limiting (80% for
LM5020-1 or 50% for LM5020-2)
• Programmable Line Under Voltage Lockout
(UVLO) with Adjustable Hysteresis
• Cycle-by-Cycle Over-Current Protection
• Slope Compensation (LM5020-1)
• Programmable Oscillator Frequency with
Synchronization Capability
• Current Sense Leading Edge Blanking
• Thermal Shutdown Protection
APPLICATIONS
• Telecommunication Power Converters
• Industrial Power Converters
• +42V Automotive Systems
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
• MSOP-10
• LLP-10 (4 mm x 4 mm)
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
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 © 2004–2006, Texas Instruments Incorporated