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LM5020

ACTIVE

13-100V Wide Vin, Current Mode PWM Boost, Flyback, Sepic Controller

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Data sheet

LM5020

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 13 Vin (max) (V) 100 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Boost, Flyback, Forward, SEPIC Rating Catalog Vout (min) (V) 1.25 Vout (max) (V) 300 Features Enable, Frequency synchronization, Nonsynchronous rectification, Pre-Bias Start-Up Iq (typ) (µA) 2000 Duty cycle (max) (%) 80
Vin (min) (V) 13 Vin (max) (V) 100 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Boost, Flyback, Forward, SEPIC Rating Catalog Vout (min) (V) 1.25 Vout (max) (V) 300 Features Enable, Frequency synchronization, Nonsynchronous rectification, Pre-Bias Start-Up Iq (typ) (µA) 2000 Duty cycle (max) (%) 80
VSSOP (DGS) 10 14.7 mm² 3 x 4.9 WSON (DPR) 10 16 mm² 4 x 4
  • 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
  • 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

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.

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.
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Technical documentation

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Type Title Date
* Data sheet LM5020 100V Current Mode PWM Controller datasheet (Rev. F) 14 Apr 2006
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Flyback converters: two outputs are better than one PDF | HTML 24 Nov 2016
Technical article What is behind isolated DC/DC converter voltage regulation? PDF | HTML 31 Aug 2015
EVM User's guide AN-1314 LM5020 Evaluation Board (Rev. B) 06 May 2013
User guide Dual Output Isolated Flyback Design:User Guide 27 Jan 2012
Application note An Alternative Approach to Higher-Power Boost Converters 30 Nov 2009
White paper PWM DC-DC Cntrllrs w/Built-In Strt-Up Regs Simp Switch Pwr Supply Design 01 Oct 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM5020EVAL — 100V Current Mode PWM Controller Flyback Evaluation Board

100V Current Mode PWM Controller Flyback Evaluation Board

User guide: PDF
Not available on TI.com
Evaluation board

PSEMTHR24EVM-081 — Mother board for 24-port IEEE 802.3bt ready PSE system

PSEMTHR24EVM-081 is the base board for the TPS23881 and TPS23882 PSE controllers. This board contains 24 2-Pair / 4-Pair ports that can that can be used to send up to 30W/port for IEEE 802.3at applications and up to 90W/port for IEEE 802.3bt applications.

View Options
Simulation model

LM5020 Unencrypted PSpice Transient Model

SNVM011.ZIP (579 KB) - PSpice Model
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CAD/CAE symbol

Dual Output Isolated Flyback Design CAD File

SNVC008.PDF (65 KB)
Download
Calculation tool

FLYBUCK-FLYBACK-DESIGN-CALC — Flybuck / Flyback Calculator

This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM3017 — High Efficiency Low-Side Controller with True Shutdown LM3478 — 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller LM3478Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 10-µA shutdown current LM3481 — 2.97V to 48V High-Efficiency Controller for Boost, SEPIC and Flyback LM3481-Q1 — 2.97-V to 48-V high-efficiency controller for boost, SEPIC and flyback, AEC-Q100 qualified LM3488 — 2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators LM3488Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 5-µA shutdown current LM3524D — 40V, 0.2A 350KHz PWM controller LM3578A — 2-V to 40-VIN switching regulators in buck, boost, terminal, depending upon the application LM5020 — 13-100V Wide Vin, Current Mode PWM Boost, Flyback, Sepic Controller LM5022 — 6-60V Wide Vin, current mode boost, SEPIC and Flyback controller TL1451 — Dual Pulse-Width-Modulation Control Circuit TL1451A — 3.6V to 50V dual channel controller with Wide input voltage range TL1451A-EP — Enhanced Product Dual Pulse-Width-Modulation Control Circuits TL1451A-Q1 — 3.6-V to 50-V dual-channel PWM controller, AEC-Q100 qualified TL5001 — PWM Controller with wide input range, with ±5% tolerance on reference, operation –20°C to 85°C TL5001A — PWM Controller with wide input range, with ±3% tolerance on reference, operation –20°C to 85°C TL5001A-Q1 — PWM Controller with wide input range, with ±3% tolerance on reference, operation –20°C to 85°C TL5001M — PWM Controller with wide input range, with ±5% tolerance on reference, operation –55°C to 125°C TPS40210-Q1 — 4.5-V to 52-V wide input range current mode boost controller with 700-mV reference voltage TPS40211-Q1 — 4.5-V to 52-V wide input range current mode boost controller with 260-mV reference voltage TPS43000 — Multi-Topology (buck, boost, sepic) High Frequency DC/DC Controller TPS55010 — 2.95V To 6V Input, 2W, Isolated DC/DC Converter with Integrated FETS UC2572 — Negative output Flyback pulse width modulator
AC/DC & DC/DC converters (integrated FET)
LM25017 — 7.5-48V Wide Vin, 650mA Constant On-Time Synchronous Buck Regulator LM25018 — 7.5-48V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator LM25019 — 7.5-48V Wide Vin, 100mA Constant On-Time Synchronous Buck Regulator LM2577 — 3.5-V to 40-V, 3-A low component count step-up regulator LM2585 — 4-V to 40-V, 3-A step-up wide VIN flyback regulator LM2586 — 4-V to 40-V, 3-A step-up wide VIN flyback regulator with frequency synchronization LM2587 — 4V to 40V, 5A Step-Up Wide Vin Flyback Regulator LM2588 — 4-V to 40-V, 5-A step-up wide VIN flyback regulator with frequency synchronization LM2621 — 1.2V to 14V input voltage, 1A load current, step-up DC-DC LM2623 — 0.8V to 14V input voltage, 2A load current, step-up DC-DC LM2623-Q1 — 0.8-V to 14-V input voltage, 2-A load current, step-up DC/DC, AEC-Q100 qualified LM2735 — 520kHz/1.6MHz space efficient boost and SEPIC DC-DC regulator LM2735-Q1 — 520-kHz, 1.6-MHz space efficient boost and SEPIC DC/DC regulator, AEC-Q100 qualified LM34925 — 7.5-100V Wide Vin, 100mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters LM34926 — 7.5-100V Wide Vin, 300mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters LM34927 — 7.5-100V Wide Vin, 600mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters LM5000 — 3.1-40V Wide Vin, 2A Current Mode Non-Synchronous Boost Regulator LM5001 — 3.1-75V Wide Vin, 1A Current Mode Non-Synchronous Switch Mode Regulator LM5001-Q1 — 3.1-V to 75-V wide VIN, 1-A current mode non-synchronous switch mode regulator LM5002 — 3.1-75V Wide Vin, 0.5A Current Mode Boost, Flyback, Sepic Converter LM5015 — 4.25-75V, Monolithic Two-Switch Forward DC-DC Regulator LM5017 — 7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator LM5018 — 7.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator LM5019 — 7.5-100V Wide Vin, 100mA Constant On-Time Synchronous Buck Regulator LM5160 — LM5160 wide input 65V, 2A synchronous buck/Fly-Buck™ converter LM5160-Q1 — Wide Input 65V, 2A Synchronous Buck / Fly-Buck™ Converter LM5160A — LM5160A Wide Input 65V, 2A Synchronous Buck / Fly-Buck™ Converter LM5161 — Wide Input 4.5-V to 100-V, 1-A Synchronous Buck / Fly-Buck Converter LM78S40 — 1.5A Adjustable Step Up, Step Down or Inverting Regulator TPS55340 — 5-A, 40-V, wide VIN boost, flyback, & SEPIC converter TPS55340-EP — Enhanced integrated, 5-A, 40-V wide input range boost/SEPIC/flyback DC/DC regulator TPS55340-Q1 — Integrated, 5-A 40-V wide input range boost/SEPIC/flyback DC/DC regulator, AEC-Q100 qualified TPS61175 — 3-A ,40V High Voltage Boost Converter with Soft-start and Programmable Switching Frequency TPS61175-Q1 — 3-A, 40-V high voltage boost converter with soft-start and programmable switching frequency
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