# BQ25895 Reference Design ## Description This project is a reference design based on the BQ25895, a single cell Li-Ion battery charger. It manages the power between an external power source (VIN), a Li-Ion battery (BAT), and a system power rail (SYS). Key features include power-path management, battery thermistor monitoring, and charge status indication. #project #BQ25895 #ReferenceDesign #charger #BatteryManagemen #referenceDesign #bms #texas-instruments #template #reference-design #polygon ## Project Details - **Owner:** vasy_skral - **Created:** 11/3/2023 - **Last Updated:** 3/5/2026 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ - **Stars:** 2 - **Forks:** 4 - **Copies:** 24 ## 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 - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Connector **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### - SYS + — [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) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Manufacturer Name: JST Sales America - Part Type: Connector **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### + PMID - — [JST B2B PH K 01x02 Connector](https://www.flux.ai/jharwinbarrozo/jst-b2b-ph-k-01x02-connector~zu5.md) - Part Type: Connector - Manufacturer Name: JST Sales America - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - 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) - 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) - Manufacturer Name: JST Sales America - Part Type: Connector **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### HOST — [Pin Header 01x06 2.54mm Vertical](https://www.flux.ai/vasy_skral/pin-header-01x06-254mm-vertical~jyw.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] ### LED1 — [LED-0402-Template](https://www.flux.ai/vasy_skral/led-0402-template~zvz.md) - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### U1 — [BQ25895RTWT](https://www.flux.ai/vasy_skral/bq25895rtwt~slj.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq25895.pdf - Manufacturer Part Number: BQ25895RTWT - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments **Pins:** - ~CE [pin 9] - ~QON [pin 12] - BAT [pin 13] - BAT__1 [pin 14] - BTST [pin 21] - D- [pin 3] - D+ [pin 2] - DSEL [pin 24] - EXP [pin 25] - ILIM [pin 10] - INT [pin 7] - OTG [pin 8] - PGND [pin 17] - PGND__1 [pin 18] - PMID [pin 23] - REGN [pin 22] - SCL [pin 5] - SDA [pin 6] - STAT [pin 4] - SW [pin 19] - SW__1 [pin 20] - SYS [pin 15] - SYS__1 [pin 16] - TS [pin 11] - VBUS [pin 1] ### USB — [Connector 01x04 0.100](https://www.flux.ai/vasy_skral/connector-01x04-0100~go.md) - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/vasy_skral/bq25895-reference-design~y5](https://www.flux.ai/vasy_skral/bq25895-reference-design~y5).* --- *Generated from [https://www.flux.ai/vasy_skral/bq25895-reference-design~y5](https://www.flux.ai/vasy_skral/bq25895-reference-design~y5)*