# MCP73831 Reference Design ## Description This project is a Lithium-ion battery charger circuit utilizing the MCP73831 integrated circuit. It includes input and output connectors, a charging current programming resistor, decoupling capacitors, and a charge status indicator LED. The design can deliver up to 500mA charge current. #project #Template #charger #referenceDesign #batterycharger #template #bms #microchip #reference-design #polygon. ## Project Details - **Owner:** vasy_skral - **Created:** 2/1/2024 - **Last Updated:** 3/4/2026 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ - **Copies:** 4 ## Key Components ### + BAT - — [JST B2B PH K 01x02 Connector](https://www.flux.ai/jharwinbarrozo/jst-b2b-ph-k-01x02-connector~zu5.md) - Manufacturer Name: JST Sales America - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Part Type: Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### + VIN - — [JST B2B PH K 01x02 Connector](https://www.flux.ai/jharwinbarrozo/jst-b2b-ph-k-01x02-connector~zu5.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Manufacturer Name: JST Sales America - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Connector **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### IC1 — [MCP73831T-2ACI/OT](https://www.flux.ai/vasyl/mcp73831t-2aciot~ugm.md) - Manufacturer Part Number: MCP73831T-2ACI/OT - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/MCP73831-Family-Data-Sheet-DS20001984H.pdf - Part Type: Integrated Circuit - Manufacturer Name: Microchip Technology **Pins:** - PROG [pin 5] - STAT [pin 1] - VBAT [pin 3] - VDD [pin 4] - VSS [pin 2] ### Rprog — [Res-0603-US-Template Simplified Footprint No Prop](https://www.flux.ai/vasy_skral/res-0603-us-template-simplified-footprint-no-prop~9v.md) - Resistance: 2kΩ - Part Type: Resistor **Pins:** - P1 [pin 1] - P2 [pin 2] ### STAT — [LED-0603-Template](https://www.flux.ai/vasy_skral/led-0603-template~ye5.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/vasy_skral/mcp73831-reference-design~4e](https://www.flux.ai/vasy_skral/mcp73831-reference-design~4e).* --- *Generated from [https://www.flux.ai/vasy_skral/mcp73831-reference-design~4e](https://www.flux.ai/vasy_skral/mcp73831-reference-design~4e)*