# LTC4054 Reference Design ## Description This project is a Lithium-ion battery charger circuit utilizing the LTC4054 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 800mA charge current. #project #Template #charger #referenceDesign #batterycharger #template #bms #analog #reference-design #polygon ## Project Details - **Owner:** vasy_skral - **Created:** 1/18/2024 - **Last Updated:** 3/4/2026 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ - **Copies:** 6 ## Key Components ### + BAT - — [JST B2B PH K 01x02 Connector](https://www.flux.ai/jharwinbarrozo/jst-b2b-ph-k-01x02-connector~zu5.md) - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Connector - Manufacturer Name: JST Sales America - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf **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) - Manufacturer Name: JST Sales America - Part Type: Connector - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### CHRG — [LED-0603-Template](https://www.flux.ai/vasy_skral/led-0603-template~ye5.md) - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### IC1 — [LTC4054ES5-4.2#TRPBF](https://www.flux.ai/vasyl/ltc4054es5-42trpbf~nh.md) - Manufacturer Name: Analog Devices Inc. - Manufacturer Part Number: LTC4054ES5-4.2#TRPBF - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/405442xf.pdf - Part Type: Integrated Circuit **Pins:** - ~CHRG [pin 1] - BAT [pin 3] - GND [pin 2] - PROG [pin 5] - VCC [pin 4] ### 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) - Part Type: Resistor - Resistance: 1.65kΩ **Pins:** - P1 [pin 1] - P2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/vasy_skral/ltc4054-reference-design~iq0](https://www.flux.ai/vasy_skral/ltc4054-reference-design~iq0).* --- *Generated from [https://www.flux.ai/vasy_skral/ltc4054-reference-design~iq0](https://www.flux.ai/vasy_skral/ltc4054-reference-design~iq0)*