Regenerative Braking Design Discussion
Thought for 4 sec
I’ll create the schematic from the selected regenerative-braking power path: add the main ICs/connectors/protection/passives, wire the six stages, then run a design review for obvious schematic issues.
Worked for 49 sec
I renamed the project and am adding the main power-path components plus connectors and support passives now.
Worked for 3 mins 17 sec
The generator inputs, bridge rectifiers, TVS clamp, supercapacitor equivalent, bleeder, and protected bus are wired; I’m wiring the charger, battery, and load rails next.
Worked for 10 mins 21 sec
Created the full schematic for the regenerative braking charger and renamed the project to Regenerative Braking Charger. I added/wired the motor inputs, dual bridge rectifiers, TVS clamp, supercapacitor equivalent, BQ25750 charger stage with external MOSFETs, 2S battery connector/protection, 5 V rail, 3.3 V RC522 rail, LCD/MCU/RFID connectors, and support passives.
Open items:
- BQ25750 bootstrap/compensation/feedback values still need datasheet-final tuning before layout.
- Supercapacitor bank is represented as an equivalent C1; final cell count, balancing, fuse, ESR, and discharge timing need sizing.
- I2C is pulled to 3.3 V for IC safety; add level shifting if your LCD module forces 5 V I2C pull-ups.
Suggested next steps:
- Finalize BQ25750 component values from the TI datasheet.
- Size the supercapacitor bank from expected braking energy.
- Move to PCB layout/placement after those values are locked.
- Use the new Board Bring-Up Plan for first-power validation.
Finalize charger and layout
Finalize BQ25750 values
Size supercapacitor bank
Add safety protections
Proceed to placement
