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reference designlm5022

Texas Instruments lm5022

Overview

TopologyFlyback Converter
IC revisionB

Description

The LM5022 device is a high-voltage, low-side, N channel MOSFET controller ideal for use in boost and SEPIC regulators. It contains all of the features required to implement single-ended primary topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation while providing inherent input voltage feedforward. The LM5022 includes a start-up regulator that operates over a wide input range of 6 V to 60 V. The PWM controller is designed for high speed capability including an oscillator frequency range up to 2.2 MHz and total propagation delays less than 100 ns. Additional features include an error amplifier, precision reference, line undervoltage lockout, cycle-by-cycle current limit, slope compensation, soft start, external synchronization capability, and thermal shutdown. The LM5022 is available in the 10-pin VSSOP package.

Features

  • Internal 60-V start-up regulator
  • 1-A Peak MOSFET gate driver
  • VIN Range: 6 V to 60 V (operates down to 3 V after start-up)
  • Duty cycle limit of 90%
  • Programmable UVLO with hysteresis
  • Cycle-by-cycle current limit
  • External synchronizable (AC-coupled)
  • Single resistor oscillator frequency set
  • Slope compensation
  • Adjustable soft start
  • 10-Pin VSSOP package

Typical applications

  • Boost converter, SEPIC converters

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
RDC max.(mΩ)
fres(MHz)
Mount
SamplesAvailability & Sample
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74439358022
SPECWE-XHMI SMT Power Inductor, 2.2 µH, 21.85 A
Simu­lation
Availability
–
Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-XHMI SMT Power Inductor
Inductance2.2 µH
Performance Rated Current21.85 A
Saturation Current @ 30%26.45 A
DC Resistance3.7 mΩ
DC Resistance4.07 mΩ
Self Resonant Frequency33 MHz
MountSMT 
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750317922
SPECFlyback Transformer, 6 µH, –
Simu­lation
Availability
–
Downloads3 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product series Flyback Transformer
Inductance6 µH
–
–
–
–
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MountTHT 
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