Two Elements Lead-Acid 16V…32V@2A Battery Charger from 170VAC to 270VAC Reference Design
PMP30047
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Key Document

Description

A quasi-resonant isolated flyback is employed to charge two lead-acid battery elements, starting from high-line mains. The converter accepts two external signals (referred to secondary side) to provide the reference voltages, which set output voltage and current. The converter shows good wide-range efficiency thanks to valley-switching modulation.

Features
  • Low cost, low EMI isolated flyback converter thanks to valley switching
  • Compact solution (small footprint: only 60mm x 60mm) supplies 64W maximum with almost flat efficiency (78%...89%) from 0.1A to 2A
  • Employs a depletion-mode startup FET to further reduce standby lossses

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Design Files

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Parametrics
 PMP30047.1
(Output Voltage 1)
Vin (Min) (V)170
Vin (Max) (V)270
Vout (Nom) (V)32
Iout (Max) (A)2
Output Power (W)64
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyFlyback- Quasi Resonant

TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM2904  Dual general-purpose operational amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
LM5023  AC-DC Quasi-Resonant Current Mode PWM Controller  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
LMP8480  76V, High-Side, High-Speed, Voltage Output Current Sensing Amplifier  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TL431  Adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM2904 Download Download
Download Download
Download Download
Download -
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LM5023 Download Download
LMP8480 Download
TL431 Download Download
Download Download
Download -
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Download -
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1082 14 Sep 2016
Design files (6)
Title Type Size (KB) Date
ZIP 54 14 Sep 2016
ZIP 711 14 Sep 2016
PDF 628 14 Sep 2016
PDF 808 14 Sep 2016
PDF 145 14 Sep 2016
PDF 493 14 Sep 2016

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