# Electronic Speed Controller

## Description

40A BLDC ESC for quadcopters, compatible with BLHeli\_S firmware\.
Built around TPN2R703NL MOSFETs \(45A continuous / 90A peak\) driven by an MP1907 half\-bridge gate driver\. Flight\-tested on a real quadcopter with brushless motors\.

## Project Details

- **Owner:** joebazoka
- **Created:** 9/23/2026
- **Last Updated:** 9/23/2026
- **Visibility:** Public
- **License:** https://creativecommons\.org/licenses/by/4\.0/

## Key Components

### Q1 — [TPN2R703NL](https://flux.ai/vasy_skral/tpn2r703nl~8i.md)

- Manufacturer Name: Toshiba
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: MOSFET
- Manufacturer Part Number: TPN2R703NL
- Datasheet URL: https://toshiba\.semicon\-storage\.com/info/TPN2R703NL\_datasheet\_en\_20191030\.pdf?did=14267&prodName=TPN2R703NL

**Pins:**
- D [pin 7]
- D [pin 6]
- D [pin 9]
- D [pin 5]
- D [pin 8]
- G [pin 4]
- S [pin 2]
- S [pin 3]
- S [pin 1]

### Q2 — [TPN2R703NL](https://flux.ai/vasy_skral/tpn2r703nl~8i.md)

- Manufacturer Name: Toshiba
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: MOSFET
- Manufacturer Part Number: TPN2R703NL
- Datasheet URL: https://toshiba\.semicon\-storage\.com/info/TPN2R703NL\_datasheet\_en\_20191030\.pdf?did=14267&prodName=TPN2R703NL

**Pins:**
- D [pin 7]
- D [pin 6]
- D [pin 9]
- D [pin 5]
- D [pin 8]
- G [pin 4]
- S [pin 2]
- S [pin 3]
- S [pin 1]

### Q3 — [TPN2R703NL](https://flux.ai/vasy_skral/tpn2r703nl~8i.md)

- Manufacturer Name: Toshiba
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: MOSFET
- Manufacturer Part Number: TPN2R703NL
- Datasheet URL: https://toshiba\.semicon\-storage\.com/info/TPN2R703NL\_datasheet\_en\_20191030\.pdf?did=14267&prodName=TPN2R703NL

**Pins:**
- D [pin 7]
- D [pin 6]
- D [pin 9]
- D [pin 5]
- D [pin 8]
- G [pin 4]
- S [pin 2]
- S [pin 3]
- S [pin 1]

### Q4 — [TPN2R703NL](https://flux.ai/vasy_skral/tpn2r703nl~8i.md)

- Manufacturer Name: Toshiba
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: MOSFET
- Manufacturer Part Number: TPN2R703NL
- Datasheet URL: https://toshiba\.semicon\-storage\.com/info/TPN2R703NL\_datasheet\_en\_20191030\.pdf?did=14267&prodName=TPN2R703NL

**Pins:**
- D [pin 7]
- D [pin 6]
- D [pin 9]
- D [pin 5]
- D [pin 8]
- G [pin 4]
- S [pin 2]
- S [pin 3]
- S [pin 1]

### Q5 — [TPN2R703NL](https://flux.ai/vasy_skral/tpn2r703nl~8i.md)

- Manufacturer Name: Toshiba
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: MOSFET
- Manufacturer Part Number: TPN2R703NL
- Datasheet URL: https://toshiba\.semicon\-storage\.com/info/TPN2R703NL\_datasheet\_en\_20191030\.pdf?did=14267&prodName=TPN2R703NL

**Pins:**
- D [pin 7]
- D [pin 6]
- D [pin 9]
- D [pin 5]
- D [pin 8]
- G [pin 4]
- S [pin 2]
- S [pin 3]
- S [pin 1]

### Q6 — [TPN2R703NL](https://flux.ai/vasy_skral/tpn2r703nl~8i.md)

- Manufacturer Name: Toshiba
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: MOSFET
- Manufacturer Part Number: TPN2R703NL
- Datasheet URL: https://toshiba\.semicon\-storage\.com/info/TPN2R703NL\_datasheet\_en\_20191030\.pdf?did=14267&prodName=TPN2R703NL

**Pins:**
- D [pin 7]
- D [pin 6]
- D [pin 9]
- D [pin 5]
- D [pin 8]
- G [pin 4]
- S [pin 2]
- S [pin 3]
- S [pin 1]

### U1 — [L78L12ABUTR](https://flux.ai/vasy_skral/l78l12abutr~xp.md)

- Manufacturer Part Number: L78L12ABUTR
- Part Type: Integrated Circuit
- Datasheet URL: https://www\.st\.com/resource/en/datasheet/l78l\.pdf
- Manufacturer Name: STMicroelectronics
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- GND [pin 2]
- GND [pin \.]
- VI [pin 3]
- VO [pin 1]

### U2 — [MP1907AGQ\-P](https://flux.ai/vasy_skral/mp1907agq-p~xyb.md)

- Package or Case Code: QFN\-10\_MP1907A\_MNP
- Manufacturer Part Number: MP1907AGQ\-P
- Symbol Style: Parametric
- Product Image Url: https://www\.monolithicpower\.com/pub/media/catalog/product/t/a/tac\_mp1907a\.jpg
- Datasheet URL: https://www\.monolithicpower\.com/en/documentview/productdocument/index/version/2/document\_type/Datasheet/lang/en/sku/MP1907AGQ
- Manufacturer Name: Monolithic Power Systems
- Product Info Url: https://www\.monolithicpower\.com/en/catalog/product/view/id/3864?utm\_source=ultralibrarian&utm\_medium=component\_search&utm\_campaign=listing

**Pins:**
- BST [pin 3]
- DRVH [pin 4]
- DRVL [pin 10]
- EN [pin 6]
- EPAD [pin 11]
- INH [pin 7]
- INL [pin 8]
- NC [pin 2]
- SW [pin 5]
- VDD [pin 1]
- VSS [pin 9]

### U3 — EFM8BB21F16G\-C\-QFN20R

- Part Type: Microcontroller
- Manufacturer Part Number: EFM8BB21F16G\-C\-QFN20R
- Manufacturer Name: Silicon Labs
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://www\.silabs\.com/documents/public/data\-sheets/efm8bb2\-datasheet\.pdf
- Symbol Style: Parametric

**Pins:**
- GND [pin 12]
- GND [pin 3]
- GND [pin 21]
- P0\.0 [pin 2]
- P0\.1 [pin 1]
- P0\.2 [pin 20]
- P0\.3 [pin 19]
- P0\.4 [pin 18]
- P0\.5 [pin 17]
- P0\.6 [pin 16]
- P0\.7 [pin 15]
- P1\.0 [pin 14]
- P1\.1 [pin 13]
- P1\.2 [pin 11]
- P1\.3 [pin 10]
- P1\.4 [pin 9]
- P1\.5 [pin 8]
- P1\.6 [pin 7]
- P2\.0/C2D [pin 6]
- RSTb/C2CK [pin 5]
- VDD [pin 4]

### U4 — [MP1907AGQ\-P](https://flux.ai/vasy_skral/mp1907agq-p~xyb.md)

- Package or Case Code: QFN\-10\_MP1907A\_MNP
- Manufacturer Part Number: MP1907AGQ\-P
- Symbol Style: Parametric
- Product Image Url: https://www\.monolithicpower\.com/pub/media/catalog/product/t/a/tac\_mp1907a\.jpg
- Datasheet URL: https://www\.monolithicpower\.com/en/documentview/productdocument/index/version/2/document\_type/Datasheet/lang/en/sku/MP1907AGQ
- Manufacturer Name: Monolithic Power Systems
- Product Info Url: https://www\.monolithicpower\.com/en/catalog/product/view/id/3864?utm\_source=ultralibrarian&utm\_medium=component\_search&utm\_campaign=listing

**Pins:**
- BST [pin 3]
- DRVH [pin 4]
- DRVL [pin 10]
- EN [pin 6]
- EPAD [pin 11]
- INH [pin 7]
- INL [pin 8]
- NC [pin 2]
- SW [pin 5]
- VDD [pin 1]
- VSS [pin 9]

### U5 — [MP1907AGQ\-P](https://flux.ai/vasy_skral/mp1907agq-p~xyb.md)

- Package or Case Code: QFN\-10\_MP1907A\_MNP
- Manufacturer Part Number: MP1907AGQ\-P
- Symbol Style: Parametric
- Product Image Url: https://www\.monolithicpower\.com/pub/media/catalog/product/t/a/tac\_mp1907a\.jpg
- Datasheet URL: https://www\.monolithicpower\.com/en/documentview/productdocument/index/version/2/document\_type/Datasheet/lang/en/sku/MP1907AGQ
- Manufacturer Name: Monolithic Power Systems
- Product Info Url: https://www\.monolithicpower\.com/en/catalog/product/view/id/3864?utm\_source=ultralibrarian&utm\_medium=component\_search&utm\_campaign=listing

**Pins:**
- BST [pin 3]
- DRVH [pin 4]
- DRVL [pin 10]
- EN [pin 6]
- EPAD [pin 11]
- INH [pin 7]
- INL [pin 8]
- NC [pin 2]
- SW [pin 5]
- VDD [pin 1]
- VSS [pin 9]

### U6 — MCP1755T\-3302E/OT

- Manufacturer Name: Microchip
- Symbol Style: Parametric
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://ww1\.microchip\.com/downloads/en/DeviceDoc/MCP1755\-MCP1755S\-Data\-Sheet\-DS20005160B\.pdf
- Part Type: Integrated Circuit
- Manufacturer Part Number: MCP1755T\-3302E/OT

**Pins:**
- EN [pin 3]
- GND [pin 2]
- PWRGD [pin 4]
- VIN [pin 1]
- VOUT [pin 5]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/joebazoka/electronic\-speed\-controller\~20](https://flux.ai/joebazoka/electronic-speed-controller~20).*

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*Generated from [https://flux\.ai/joebazoka/electronic\-speed\-controller\~20](https://flux.ai/joebazoka/electronic-speed-controller~20)*