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STD Module - Reverse Polarity Protection
License: MIT
Mode: Editors' pick
- 1
Update time：
2023-05-08 11:01:25
Creation time：
2020-01-30 12:24:10
Description
This is a simple circuit to protect your device against accidental reverse polarity connections. With the current set of components this circuit can be used for 1.5V to 12V DC input circuits.
**Adapting for larger voltage**
This can be easily adapted to higher voltages by changing the
- MOSFET (to one with a larger gate voltage). MOSFET currently used can go up to 20V.
- TVS diode with right clamping voltage. Currently it is maxed at 12V.
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | DC-OUT-PIN | P1 | HDR-TH_2P-P2.54-V-M | 1 |
| 2 | 10uf | C1,C2 | 1206 | 2 |
| 3 | PTCSMD | F1 | PTC-1206 | 1 |
| 4 | JST_XH_2_Pin_2.54_RA | 12V-MAX-DC-IN | JST_XH_2_PIN_RA | 1 |
| 5 | SMB12CA | D1 | SMB(DO-214AA) | 1 |
| 6 | IRF9540NS | Q1 | TO-263-2 | 1 |
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