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reference designLM5020 | Demoboard PMP30853

Texas Instruments LM5020 | Demoboard PMP30853

SiC Based 500W HV Buck Converter Reference Design

Overview

TopologyBuck Converter
Input voltage500-600 V
Output 1400 V / 1.25 A
IC revisionD

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.

Features

  • 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

Typical applications

  • Telecommunication Power Converters
  • Industrial Power Converters
  • +42V Automotive Systems

More information

Products

Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
Ø Cable max.(mm)
Ø OD(mm)
Ø ID(mm)
L(mm)
Z @ 25 MHz
1 turn(Ω)
Z @ 100 MHz
1 turn(Ω)
Material
Samples
74270033
WE-AFB, 4.4 mm, 9.5 mm
Simu­lation
Downloads2 files

CAD files ZIP

Download all 2 files as zip archive
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-AFB
Cable Diameter Max.4.4 mm
Outer Diameter9.5 mm
Inner Diameter4.75 mm
Length9.5 mm
Impedance @ 25 MHz 1 turn47 Ω
Impedance @ 100 MHz 1 turn68 Ω
Material3 W 800 
750319295
Power Inductor, –, –
Simu­lation–
Downloads–
Status Activei| Production is active. Expected lifetime: >10 years.
Product series Power Inductor
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