# Bidirectional DC-DC Energy Storage Manager ## Description Bidirectional DC-DC converter management system PCB for energy storage applications. The design targets bidirectional charge and discharge control, dynamic power regulation, energy optimization, and overload protection for storage systems. It integrates a control section with MCU-class supervision, 16-bit ADC measurement, PWM-based power-stage control, and industrial CAN/RS485 communication, while planning practical PCB partitioning for high-current power paths, mixed-signal control, and protected interfaces. Target conversion efficiency is 98% or higher, with CMOS-oriented high-integration design intent adapted into a manufacturable mixed-signal PCB implementation. ## Project Details - **Owner:** bayinbrook - **Created:** 4/16/2026 - **Last Updated:** 4/16/2026 - **Visibility:** Public ## Key Components ### D1 — [SMBJ75CA](https://www.flux.ai/adrian95/smbj75ca.md) - Role Details: Suppresses connector and cable transients on the protected DC power port. - Datasheet URL: https://www.littelfuse.com/~/media/electronics/datasheets/tvs_diodes/littelfuse_tvs_diode_smbj_datasheet.pdf.pdf - Manufacturer Name: Littelfuse Inc. - Part Type: Diode - Manufacturer Part Number: SMBJ75CA - Package: SMBJ - License: https://creativecommons.org/licenses/by/4.0/ - Role: TVS surge clamp **Pins:** - A [pin 2] - K [pin 1] ### F1 — [2410BP-30A](https://www.flux.ai/lcsc/2410bp-30a.md) - LCSC Part Number: C2838932 - Manufacturer Part Number: 2410BP-30A - Role: Series fuse - Package or Case Code: FUSE-SMD_L6.1-W2.6 - Manufacturer Name: prosemi(普罗森美) - JLCPCB Part Class: Extended Part - Part Type: Fuses - Package: 2410 - Role Details: Provides sacrificial high-current protection for the external energy path. **Pins:** - 1 [pin 1] - 2 [pin 2] ### IC1 — [SN65HVD255DR](https://www.flux.ai/vasyl/sn65hvd255dr.md) - Manufacturer Name: Texas Instruments - Role: CAN interface - License: https://creativecommons.org/licenses/by/4.0/ - Package: SOIC-8 - Manufacturer Part Number: SN65HVD255DR - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fsn65hvd255 - Role Details: Physical layer transceiver for controller CAN communication. - Part Type: Interface **Pins:** - CANH [pin 7] - CANL [pin 6] - GND [pin 2] - NC [pin 5] - RXD [pin 4] - S [pin 8] - TXD [pin 1] - VCC [pin 3] ### U1 — [BQ25756](https://www.flux.ai/jecstronic/bq25756.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq25756.pdf - Manufacturer Part Number: BQ25756 - Manufacturer Name: Texas Instruments - Role Details: Supervises bidirectional buck-boost conversion between storage port and DC bus with telemetry and programmable control. - Package: QFN - Role: Bidirectional power conversion controller - Part Type: Integrated Circuit **Pins:** - ACN [pin 29] - ACOV [pin 35] - ACP [pin 30] - ACUV [pin 34] - BTST1 [pin 26] - BTST2 [pin 20] - CE [pin 7] - DRV_SUP [pin 23] - EPAD [pin 37] - FB [pin 12] - FBG [pin 11] - FSW_ SYNC [pin 36] - HIDRV1 [pin 27] - HIDRV2 [pin 19] - ICHG [pin 9] - INT [pin 3] - LODRV1 [pin 25] - LODRV2 [pin 21] - M_HIZ [pin 10] - NC [pin 15] - NC [pin 16] - NC [pin 31] - PG [pin 6] - PGND [pin 17] - PGND [pin 22] - 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] - TS [pin 8] - VAC [pin 33] - VAC [pin 32] ### U2 — [THVD1451D](https://www.flux.ai/kicad-part-library/thvd1451d.md) - Package or Case Code: SOIC-8_3.9x4.9mm_P1.27mm - Role Details: Physical layer transceiver for controller RS485 communication. - Package: SOIC-8 - Manufacturer Name: Texas Instruments Inc. - Role: RS485 interface - Manufacturer Part Number: THVD1451D - Datasheet URL: http://www.ti.com/lit/ds/symlink/thvd1451.pdf **Pins:** - A [pin 8] - B [pin 7] - D [pin 3] - GND [pin 4] - R [pin 2] - VCC [pin 1] - Y [pin 5] - Z [pin 6] ### U3 — [TMS320F2800157-Q1](https://www.flux.ai/jecstronic/tms320f2800157-q1.md) - Manufacturer Part Number: TMS320F2800157-Q1 - Role Details: Runs bidirectional power flow supervision, reads sensed values, coordinates PWM and faults, and manages CAN/RS485 communications. - Manufacturer Name: Texas Instruments - Package: LQFP-64 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/lit/ds/symlink/tms320f2800157-q1.pdf - Part Type: Microcontroller - Role: Supervisory controller **Pins:** - A0/C15/CMP1_DACL [pin 15] - A1 [pin 14] - A10/C10,GPIO230 [pin 25] - A11/C0 [pin 12] - A12/C1 [pin 18] - A15/C7 [pin 10] - A16/C16,GPIO28 [pin 2] - A17/C17,GPIO20 [pin 27] - A18/C18,GPIO21 [pin 28] - A19/C19,GPIO13 [pin 29] - A2/C9,GPIO224 [pin 9] - A20/C20,GPIO12 [pin 30] - A3/C5,GPIO242 [pin 8] - A4/C14 [pin 23] - A5/C2 [pin 13] - A6,GPIO228 [pin 6] - A7/C3 [pin 19] - A8/C11 [pin 20] - C4/A14 [pin 11] - C6,GPIO226 [pin 7] - C8/A9,GPIO227 [pin 24] - GPIO0 [pin 52] - GPIO1 [pin 51] - GPIO10 [pin 63] - GPIO11 [pin 31] - GPIO16 [pin 33] - GPIO17 [pin 34] - GPIO18,X2 [pin 41] - GPIO19,X1 [pin 42] - GPIO2 [pin 50] - GPIO22 [pin 56] - GPIO23 [pin 54] - GPIO24 [pin 35] - GPIO29 [pin 1] - GPIO3 [pin 49] - GPIO32 [pin 40] - GPIO33 [pin 32] - GPIO35/TDI [pin 39] - GPIO37/TDO [pin 37] - GPIO4 [pin 48] - GPIO40 [pin 53] - GPIO41 [pin 55] - GPIO5 [pin 61] - GPIO6 [pin 64] - GPIO7 [pin 57] - GPIO8 [pin 47] - GPIO9 [pin 62] - TCK [pin 36] - TMS [pin 38] - VDD [pin 44] - VDD [pin 4] - VDD [pin 59] - VDDA [pin 22] - VDDIO [pin 43] - VDDIO [pin 60] - VREFHI [pin 16] - VREFLO [pin 17] - VREGENZ [pin 46] - VSS [pin 26] - VSS [pin 5] - VSS [pin 58] - VSS [pin 45] - VSSA [pin 21] - XRSN [pin 3] ### U4 — [TPS26630RGE](https://www.flux.ai/kicad-part-library/tps26630rge.md) - Role: Electronic fuse - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps2663.pdf - Package or Case Code: Texas_RGE0024H_VQFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm_ThermalVias - Package: VQFN - Manufacturer Part Number: TPS26630RGE - Manufacturer Name: Texas Instruments Inc. - Role Details: Provides hot-plug, overcurrent, and surge protection on the external power interface. **Pins:** - ~{FLT} [pin 14] - ~{SHDN} [pin 12] - B_GATE [pin 3] - DRV [pin 4] - dVdT [pin 9] - GND [pin 25] - GND [pin 8] - ILIM [pin 10] - IMON [pin 13] - IN [pin 1] - IN [pin 2] - IN_SYS [pin 5] - MODE [pin 11] - NC [pin 19] - NC [pin 21] - NC [pin 22] - NC [pin 23] - NC [pin 20] - NC [pin 24] - OUT [pin 18] - OUT [pin 17] - OVP [pin 7] - PGOOD [pin 16] - PGTH [pin 15] - UVLO [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/bayinbrook/bidirectional-dc-dc-energy-storage-manager](https://www.flux.ai/bayinbrook/bidirectional-dc-dc-energy-storage-manager).* --- *Generated from [https://www.flux.ai/bayinbrook/bidirectional-dc-dc-energy-storage-manager](https://www.flux.ai/bayinbrook/bidirectional-dc-dc-energy-storage-manager)*