Single-Cell Li-Ion Charger for Enhanced EMI Performance in Handheld Industrial Applications Design
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Key Document


The PMP5291 is a single cell Lithium-ion battery charger reference design optimized for small low profile applications. The inductors used in the design are 1mm in height and the PC board is 20mmX30mm. Integrated power MOSFETs enable low EMI operation and minimize component count. The design was built and characterized for efficiency and output ripple in a single cell Lithium-ion application.

  • Enhanced EMI Performance Integrated Power FETs For Up To 0.5-A Charge Rate with low profile 1mm inductors
  • Suitable For 1-cell Li-Ion and Li-Polymer Battery Packs
  • Synchronous Fixed-Frequency PWM Controller Operating at 1.1 MHz With 0% to 100% Duty Cycle
  • This design was built and tested, and includes the test report and design files

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Schematic/Block Diagram

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Design Files

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(Output Voltage 1)
Vin (Min) (V)4
Vin (Max) (V)11
Vout (Nom) (V)4.2
Iout (Max) (A).5
Output Power (W)2.1
Input TypeDC
TopologyBuck- Synchronous

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ24120  Synchronous Switch-mode 1-cell Li-ion charger w/2A FET, enhanced EMI performance  Battery management ICs  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ24120 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 208 28 Sep 2015
Design files (3)
Title Type Size (KB) Date
PDF 57 28 Sep 2015
ZIP 101 28 Sep 2015
PDF 29 28 Sep 2015

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