Inspired by the ODrive Regen Clamp, the clampinator is a custom built regeneration clamp targeting 16-60V systems.
- 16-60V input
- Adjustable clamp voltage via trimpot
- Full reverse current protection via TI's LM7481-Q1
- Ideal diode inrush current limiting supported, but marked as DNP
- External pre-charge resistor
- FULL galvanic isolation between power and logic domains
- USB-C port for programming
- STM32H5 based logic control
- Digital control to disconnect power input from output
- 2x CAN FD exposed w/toggleable termination resistors
- Two onboard LEDs (Yellow and RGB)
- Two 10k thermistor slots for thermistors
- Two 15V outputs for active cooling fans
Caution
The Clampinator must not be plugged in unless the power switch is off. To turn on, slide power switch to PRECHARGE, and only proceed to RUN after allowing at least 1s for the bulk capacitors to charge.
The STM32 on the board is equipped with two built in CAN FD controllers, and the Clampinator has two accompanying CAN transcievers in the bottom left of the board. There is dip switch SW5 which can be used to toggle the internal 120Ω termination resistors.
The Clampinator can be ordered from sites like JLCPCB. The KiCAD source files are in ./KiCAD and the production gerber files are in ./KiCAD/prod along with the bom.
| Name | Purpose | Quantity | Total Cost (USD) | Link | Distributor |
|---|---|---|---|---|---|
| LCSC Parts | Majority of PCB Components (With GSDL selected) | 124.28 | LCSC | ||
| 150R 25W Resistor | Precharge Resistor (Inrush Current Limiting) | 1 | 5.19 | https://www.digikey.com/en/products/detail/riedon-products-by-bourns/UAL25-150RF8/3886469 | DigiKey |
| 1818-VP036584000AG-ND | Connect Main Power | 2 | 5.50 | https://www.digikey.com/en/products/detail/amphenol-anytek/VP036584000AG/10378245 | DigiKey |
| 1818-VP0265840000G-ND | Connect Precharge Resistor | 1 | 3.10 | https://www.digikey.com/en/products/detail/amphenol-anytek/VP0265840000G/10378270 | DigiKey |
| EG1847-ND | Switch for Logic Side of Board | 0.89 | https://www.digikey.com/en/products/detail/e-switch/EG1270/6076 | DigiKey | |
| 259-1805-ND | Active Cooling Fan (price includes est. tariff) | 2 | 15.48 | https://www.digikey.com/en/products/detail/sunon-fans/MF80252V1-1000U-A99/6198743 | DigiKey |
| SW115-ND | (GPI-154-3013) Precharge Switch | 1.83 | https://www.digikey.com/en/products/detail/cw-industries/GPI-154-3013/902 | DigiKey | |
| 1.6R 500W Resistor | Main brake resistor | 29.99 | https://www.youdaelectronics.com/products/1pc-500w-watt-16-ohm-500w-16r-aluminum-housing-wire-wound-resistor-29x52x250mm-3199 | Youda Electronics | |
| JLCPCB + Stencil | Main Clampinator Board | 1 | 101.38 | JLCPCB |