PL01 - 3.7v LiPo Battery Power Supply

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PL01 - 3.7v LiPo Battery Power Supply (AN971 & PAM2305)
PL01 V0.5.0 Front.JPG
Front
PL01 V0.5.0 Back.JPG
Back
Main Category Power
Sub Category LiPo
Introduced 1 January 2017; 2 years ago (2017-01-01)
Current version 1.0.0
Current version date 1 January 2017; 2 years ago (2017-01-01)
Size 2x2U (32x32mm)
Weight 3.5 g
Height 11.3/2.6/8.6 mm
East USB Micro B & ☒BUS
Main Chip MCP73831/PAM2305
Microchip logo.png
Microchip Technology Inc.

Overview

This xCHIP charges a 3.7v LiPo battery via power input from a Micro USB power source. Unless connected to this Micro USB power source, the circuit draws power from the LiPo battery and supply the xBUS with power.

The on-board MCP73831 LiPo battery charging IC offers a simple and efficient battery charging solution with various features, such as Auto Off, Cell Preconditioning, Cell Temperature Monitoring, Reverse Polarity Protection, Status Indication and Under Voltage Protection/Brown-Out. It is capable of charging the battery at a rate up to a maximum of 500 mA.

The equipped PAM2305 is a step-down current-mode, DC-DC converter. At heavy load, the constant frequency PWM control performs with excellent stability and transient response. To ensure the longest battery life in portable applications, the PAM2305 provides a power-saving Pulse Skipping Modulation (PSM) mode to reduce quiescent current under light load operation to save power.

Product Highlights

  • 1 A Continuous Output Current
  • Micro USB Charging
  • LED Charging Status Indicator
  • 500 mA Battery Charging Capacity
  • Supports Various 3.7V LiPo Batteries via 2.54 mm Pitch Solder Points
  • Charging Auto Off
  • Cell Preconditioning
  • Reverse Polarity Protection
  • Under Voltage Protection, Brown-Out

Specifications

MCP73831

  • 500 mA Continuous Battery Charging Current
  • Auto Off
  • Cell Preconditioning
  • Reverse Polarity Protection
  • Status Indication
  • Under Voltage Protection, Brown-Out

PAM2305

  • Efficiency up to 96%
  • Only 40µA(typ) Quiescent Current
  • Output Current: Up to 1A
  • Internal Synchronous Rectifier
  • 1.5MHz Switching Frequency
  • Soft Start
  • Under-Voltage Lockout
  • Short Circuit Protection
  • Thermal Shutdown

External Links

Datasheet

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