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USB LiPoly Charger - Single Cell (Open hardware)

4 years ago 642
  • Description
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  • BOM
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Description

Description: If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The SparkFun USB LiPo Charger is a basic charging circuit that allows you to charge 3.7V LiPo cells at a rate of 500mA or 100mA. It is designed to charge single-cell Li-Ion or Li-Polymer batteries.

The board incorporates a charging circuit, status LED, selectable solder jumper for 500mA or 100mA charging current, external LED footprint, USB input, two pre-installed JST connectors for SYS OUT and BATT IN, and (back by popular demand) a barrel jack connector.

There is also a ‘SYS OUT’ with a pre-installed JST connector which allows you to connect the charging circuit directly to your project so you don’t need to disconnect the charger each time you want to use it.

GitHub (Design Files) Sparkfun link:https://www.sparkfun.com/products/12711

Documents

USB_LiPolyCharger_SingleCell SCH

USB_LiPolyCharger_SingleCell PCB

BOM

ID Name Designator Footprint Quantity
1 STAND-OFF JP8,JP10,JP7,JP9 STAND-OFF 4
2 LOGO-SFE JP11 SFE-NEW-WEBLOGO 1
3 MCP73831 U1 SOT23-5 1
4 USBSMD X1 USB-MINIB 1
5 330 R1 0603-RES 1
6 RED LED2 LED-0603 1
7 4.7uF C1,C2 0603-CAP 2
8 2k R-PROG1 0603-RES 1
9 SOLDERJUMPER_2WAY SJ1 SJ_3 1
10 10k R-PROG2 0603-RES 1
11 DNP LED1 LED3MM 1
12 FIDUCIAL JP12,JP13 FIDUCIAL-1X2 2
13 POWER_JACKSMD J1 POWER_JACK_SMD 1
14 MBRA140 D1,D2 SMA-DIODE 2
15 FRAME-LETTER FRAME1 CREATIVE_COMMONS 1
16 JST_2MM_MALE J2,J3 JST-2-SMD 2
17 M02 JP1,JP2 1X02 2
18 OSHW-LOGO LOGO1 OSHW-LOGO-S 1
19 RESISTOR PROG AXIAL-0.3 1

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