SLUAAG6 June   2022 BQ25180

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Features
  5. 3Test Results
  6. 4Thermal Results
  7. 5Board Design Files
    1. 5.1 BQ25180 Schematic
    2. 5.2 BQ25180 Bill of Materials
    3. 5.3 BQ25180 PCB Layers
    4. 5.4 BQ25181 Schematic
    5. 5.5 BQ25181 Bill of Materials
    6. 5.6 BQ25181 PCB Layers
  8. 6References

Abstract

This application note showcases the BQ2518x family of linear chargers in a compact small form factor battery charger application design. The BQ25180 and BQ25181 are I2C controlled, 1-cell 1-A linear battery chargers with power-path which focuses on small solution size and low quiescent current. The BQ2518x devices are well suited for wearables, medical, gaming accessories, trackers, and building automation applications. Available on a Wafer-level Chip-Scale (WCSP) and Quad-flat No-Leads (QFN) packages. The total solution size area of the BQ25180 (8-pin WCSP) design is 7 mm2 and for the BQ25181 (10-pin QFN) the total solution size area is 12 mm2. The solution size encompasses all the key components needed for operation.

Incorporated for functional evaluation on the board there is access to all pins of the BQ2518x via test points and it also includes the USB2ANY connector, used for communicating with the device via the TI Chargers GUI software. The total size of the 2-layer circuit board is 38 mm ✕ 38 mm for both BQ25180 and BQ25181 designs.

BQ25180 and BQ25181 Small Form Factor Boards