# Regenerative Braking Charger ## Description Regenerative braking power generation and charging circuit using two DC motor generators, rectification, TVS protection, supercapacitor buffering, a 2S Li-ion buck-boost charger, BMS protection, and regulated 5 V/3.3 V load rails. ## Project Details - **Owner:** evomtk067 - **Created:** 6/23/2026 - **Last Updated:** 6/23/2026 - **Visibility:** Public ## Key Components ### BR1 — [TS25P05G](https://www.flux.ai/adrian95/ts25p05g~19.md) - Manufacturer Part Number: TS25P05G - Role: Rectifier - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 600V bridge rectifier for motor 1 regenerated power - Part Type: Bridge Rectifier - Manufacturer Name: Taiwan Semiconductor Corporation - Datasheet URL: https://services.taiwansemi.com/storage/resources/datasheet/TS25P01G%20SERIES_Q2203.pdf **Pins:** - - [pin 4] - + [pin 1] - ~_1 [pin 2] - ~_2 [pin 3] ### BR2 — [TS25P05G](https://www.flux.ai/adrian95/ts25p05g~19.md) - Role: Rectifier - Manufacturer Part Number: TS25P05G - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Bridge Rectifier - Datasheet URL: https://services.taiwansemi.com/storage/resources/datasheet/TS25P01G%20SERIES_Q2203.pdf - Manufacturer Name: Taiwan Semiconductor Corporation - Role Details: 600V bridge rectifier for motor 2 regenerated power **Pins:** - - [pin 4] - + [pin 1] - ~_1 [pin 2] - ~_2 [pin 3] ### D1 — [SMBJ24A](https://www.flux.ai/cherepanyadima/smbj24a~2b.md) - Manufacturer Name: Taiwan Semiconductor Corporation - Part Type: TVS - Manufacturer Part Number: SMBJ24A-TR - Role Details: 24V working TVS, ~38.9V clamp, 600W peak transient protection for rectified motor bus - Role: Protection - Datasheet URL: https://services.taiwansemi.com/storage/resources/datasheet/SMBJ%20SERIES_R2104.pdf **Pins:** - A [pin 2] - K [pin 1] ### J1 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Name: Ningbo Xinlaiya Elec. - Role Details: Motor 1 DC generator input, floating polarity into bridge rectifier - Role: Input Connector - Part Type: Connector **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J2 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Name: Ningbo Xinlaiya Elec. - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role: Input Connector - Part Type: Connector - Manufacturer Part Number: XY301V-A-5.0-2P - Role Details: Motor 2 DC generator input, floating polarity into bridge rectifier **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J3 — [B3B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/b3b-ph-k-slfsn~xzb.md) - Part Type: Connector - Manufacturer Name: JST Sales America Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Part Number: B3B-PH-K-S(LF)(SN) - Role: Battery Connector - Role Details: 2S battery connector pins B+, BMID, B- **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J4 — [Pin Header 01x04 2.54mm Vertical i2c](https://www.flux.ai/hasanbasri93/pin-header-01x04-2p54mm-vertical-i2c~37.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Role: Load Connector - Role Details: LCD connector: +5V, GND, I2C SDA, I2C SCL **Pins:** - 5V [pin 1] - GND [pin 2] - SCL [pin 4] - SDA [pin 3] ### J5 — [2x5 Pin Shrouded Header](https://www.flux.ai/rex-flux/2x5-pin-shrouded-header~tg.md) - Datasheet URL: https://www.we-online.com/catalog/datasheet/61201021621.pdf - Manufacturer Name: Würth Elektronik - Role: MCU Connector - Manufacturer Part Number: 61201021621 - Role Details: External microcontroller connector carrying +5V, GND, I2C, SPI, reset and sense signals - Part Type: Connector **Pins:** - P1 [pin 1] - P10 [pin 10] - P2 [pin 2] - P3 [pin 3] - P4 [pin 4] - P5 [pin 5] - P6 [pin 6] - P7 [pin 8] - P7 [pin 7] - P9 [pin 9] ### J6 — [2x5 Pin Shrouded Header](https://www.flux.ai/rex-flux/2x5-pin-shrouded-header~tg.md) - Role Details: RC522 connector: +3V3_RFID, GND, SPI and reset; IRQ spare no-connect if unused - Datasheet URL: https://www.we-online.com/catalog/datasheet/61201021621.pdf - Role: RFID Connector - Manufacturer Name: Würth Elektronik - Manufacturer Part Number: 61201021621 - Part Type: Connector **Pins:** - P1 [pin 1] - P10 [pin 10] - P2 [pin 2] - P3 [pin 3] - P4 [pin 4] - P5 [pin 5] - P6 [pin 6] - P7 [pin 8] - P7 [pin 7] - P9 [pin 9] ### Q1 — [SISS52DN-T1-GE3](https://www.flux.ai/adrian95/siss52dn-t1-ge3.md) - Role: Switching - Datasheet URL: https://www.vishay.com/docs/79977/siss52dn.pdf - Manufacturer Name: Vishay - Manufacturer Part Number: SiSS52DN-T1-GE3 - Part Type: Transistors - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: BQ25750 external buck-boost switching MOSFET; gate/source/drain wiring follows datasheet reference design and final current/thermal sizing **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - D_6 [pin 10] - D_7 [pin 11] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### Q2 — [SISS52DN-T1-GE3](https://www.flux.ai/adrian95/siss52dn-t1-ge3.md) - Manufacturer Part Number: SiSS52DN-T1-GE3 - Part Type: Transistors - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: BQ25750 external buck-boost switching MOSFET; gate/source/drain wiring follows datasheet reference design and final current/thermal sizing - Manufacturer Name: Vishay - Datasheet URL: https://www.vishay.com/docs/79977/siss52dn.pdf - Role: Switching **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - D_6 [pin 10] - D_7 [pin 11] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### Q3 — [SISS52DN-T1-GE3](https://www.flux.ai/adrian95/siss52dn-t1-ge3.md) - Manufacturer Name: Vishay - Datasheet URL: https://www.vishay.com/docs/79977/siss52dn.pdf - Role Details: BQ25750 external buck-boost switching MOSFET; gate/source/drain wiring follows datasheet reference design and final current/thermal sizing - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistors - Role: Switching - Manufacturer Part Number: SiSS52DN-T1-GE3 **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - D_6 [pin 10] - D_7 [pin 11] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### Q4 — [SISS52DN-T1-GE3](https://www.flux.ai/adrian95/siss52dn-t1-ge3.md) - Role Details: BQ25750 external buck-boost switching MOSFET; gate/source/drain wiring follows datasheet reference design and final current/thermal sizing - Manufacturer Name: Vishay - Datasheet URL: https://www.vishay.com/docs/79977/siss52dn.pdf - Part Type: Transistors - Manufacturer Part Number: SiSS52DN-T1-GE3 - Role: Switching - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - D_6 [pin 10] - D_7 [pin 11] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### U1 — [BQ25750](https://www.flux.ai/tima/bq25750~r4.md) - Operating Voltage: 4.2V-70V - Role: Battery Charger - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq25750.pdf?ts=1722747231201&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FBQ25750%253Fbm-verify%253DAAQAAAAJ_____xavQICyghxurJ8h0MdmBt-6yCgzPu3CqYoVVtuqwDXce0eDfnOvkMLPkddc3wzYm1Q1D4_lEXQi_59PzlCKGXEyu25rTOaGwfObZ4oHttDUK5uM6lzDQnJgUXRpKd9vkXn7r32wjhqrGXq2I1oN9hja0B8q_D6egvZ53aiZP3_o87AE-9itXVcK-8eWK5eA1cJUHiZfy1YUVIc3fhEdpjp7l02Utm3k18wV927sWDsngU5ldBKqrlVeoNrwCXAUeY1s29V61lsrupHxWsiS6UVgMHIueq3Uc3K8HL_bBvfhqu8 - Purchase Url: https://www.ti.com/product/BQ25750?bm-verify=AAQAAAAJ_____zxRvj-aoQBOSpiNoJewyZT3vSMQ4fs-qKCB0fTXHEIQQLjhvqvGUy9QVwHofE6JQ0IzygYjaKwpXQSyI1dW3sGWOi4OWDiSUk3H4j7xewdQc_eW3dOuRvuuFRFchyKfbEKlLpWjDv1XS4hDhYxyEmIFl5R6XGIv9nRw_kENUdiZbExDCJ2RcUcgMsVqDz3kWQgs-Y7G5E25SFfLEiTd2LBSCGj6yRE-Hw30EqPnruQ_X_0-aIwG6QNWsE3qLWgcH658Zb9mxpWgSm8Ntya-QzwnSBWIWKwtD8KeMgIyuy5l#all - Current: 0.4A - 20A - Role Details: Buck-boost charger controller configured for 2S Li-ion, 8.4V charge voltage; support network requires datasheet-finalized values - Connectivity: I2C **Pins:** - _CE [pin 7] - _INT [pin 3] - _PG [pin 6] - ACDRV [pin 31] - ACN [pin 29] - ACOV [pin 35] - ACP [pin 30] - ACUV [pin 34] - BAT DRV [pin 15] - BAT SRC [pin 16] - BTST1 [pin 26] - BTST2 [pin 20] - DRV_SUP [pin 23] - FB [pin 12] - FBG [pin 11] - FSW_SYNC [pin 36] - HIDRV1 [pin 27] - HIDRV2 [pin 19] - ICHG [pin 9] - ILIM_HIZ [pin 10] - LODRV1 [pin 25] - LODRV2 [pin 21] - PGND [pin 22] - PGND [pin 17] - REGN [pin 24] - SCL [pin 1] - SDA [pin 2] - SRN [pin 13] - SRP [pin 14] - STAT1 [pin 4] - STAT2 [pin 5] - SW1 [pin 28] - SW2 [pin 18] - SYS [pin 32] - THEM_GND - TS [pin 8] - VAC [pin 33] ### U2 — [BQ29209DRBR](https://www.flux.ai/lcsc/bq29209drbr~kb1i.md) - Product Info Url: https://lcsc.com/product-detail/PMIC-Battery-Management_TI_BQ29209DRBR_BQ29209DRBR_C139352.html - Part Type: Battery Management ICs - Manufacturer Part Number: BQ29209DRBR - LCSC Part Number: C139352 - Role Details: 2-cell Li-ion protection/management IC for overvoltage, undervoltage, overcurrent protection and balancing - JLCPCB Part Class: Extended Part - Package or Case Code: SON-8_L3.0-W3.0-P0.65-LS3.0-BL-EP - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410121542_Texas-Instruments-BQ29209DRBR_C139352.pdf - Role: Battery Protection - Manufacturer Name: TI(德州仪器) - Symbol Style: parametric-v1 **Pins:** - ~{CB_EN} [pin 6] - CD [pin 4] - EP [pin 9] - GND [pin 5] - OUT [pin 8] - VC1 [pin 2] - VC1_CB [pin 3] - VC2 [pin 1] - VDD [pin 7] ### U4 — [MIC5365-3.3YC5](https://www.flux.ai/kicad-part-library/mic5365-3p3yc5~rp.md) - Role Details: Fixed 3.3V 150mA LDO powered from 5V rail for RC522 VCC - Manufacturer Name: Microchip Technology Inc. - Package or Case Code: SOT-353_SC-70-5 - Role: Voltage Regulator - Datasheet URL: http://ww1.microchip.com/downloads/en/DeviceDoc/mic5365.pdf - Manufacturer Part Number: MIC5365-3.3YC5 **Pins:** - EN [pin 3] - GND [pin 2] - NC [pin 4] - VIN [pin 1] - VOUT [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/evomtk067/regenerative-braking-charger~r3](https://www.flux.ai/evomtk067/regenerative-braking-charger~r3).* --- *Generated from [https://www.flux.ai/evomtk067/regenerative-braking-charger~r3](https://www.flux.ai/evomtk067/regenerative-braking-charger~r3)*