

AltairMD V9
AltairMD_V9
- Size
- 100 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 54
- Nets
- 28
- Pads
- 189
- Tracks, vias
- 300, 393
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 19 Apr 2026
- Updated
- 2 Oct 2026
Overview
AltairMD V9 is an open-source printed circuit board by Altairu, from the Altairu/AltairMD_V9 repository on GitHub. It is a 2-layer board of 100 × 60 mm with 54 parts on 28 nets, routed with 300 tracks and 393 vias.
It is built around the IR2302STRPBF, TLP152 and L7812, with the AOD4184A among its other parts. Its parts include 14 resistors, 11 capacitors, 10 diodes, 6 ICs and 4 transistors.
Main components
4IR2302STRPBF
SOIC-8-40℃~+150℃ 130ns 1mA 2 200mA 200ns 350mA 50ns 5V~20V 750ns Half-Bridge IGBT、MOSFET Under Voltage Protection SOIC-8 Gate Drivers ROHSInfineon TechnologiesGate DriversTLP152
SO-6Gate Drive OptocouplerKTPL7812
TO-220ST0℃~+125℃@(Tj) 1 1.2A 12V 2V@(1A) 30V 71dB@(120Hz) 76uV Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsAOD4184A
TO-252-55℃~+175℃ 1 N-channel 1.8nF 13A、50A 2.3W、50W 2.6V 33nC@10V 40V 7mΩ@10V TO-252 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
README
README.mdAltairMD_V9 (High Current H-Bridge Motor Driver)
AltairMD_V9 は、小型かつ高出力なモーター制御を目的とした、MOSFET方式のHブリッジモータードライバーです。
V7の回路に非常に近いです. https://github.com/Altairu/AltairMD_V7
🛠 主な仕様
- MOSFET: AOD4184A (N-channel, 40V / 50A)
- Gate Driver: EG2104 (Half-bridge driver with SD input)
- Logic Voltage: 3.3V / 5V 互換
- Motor Voltage: 12V 〜 30V (推奨)
- Interface: PWM (Speed Control) + DIR (Direction Control)
⚡ 特徴と設計のポイント
1. パワフルなスイッチング
AOD4184Aを採用することで、低オン抵抗(標準 $7.0\text{m}\Omega$)を実現。小型ながら大きな電流を扱える設計になっています。
2. EG2104による安定した駆動
EG2104ゲートドライバを搭載することで、ブートストラップ方式によるハイサイドMOSFETの確実な駆動を可能にしています。これにより、24V系でもスイッチング損失を抑えた効率的な動作が可能です。
3. PCBレイアウト
大電流パスには太い配線と十分なビアを配置し、D-PAKパッケージの底面から基板への放熱を最適化しています。
⚠️ 使用上の注意(重要)
- 最大電流の限界: データシート上の定格は50Aですが、本ボードのサイズ(自然空冷)では連続5A〜10A程度を目安に使用してください。15Aを超える連続通電を行う場合は、ヒートシンクの貼り付けやファンによる強制空冷が必須です。
- ジャンクション温度: 内部シリコン温度が 175°C を超えると素子が破壊されます。高温時はオン抵抗が増大し、さらに発熱が加速する(熱暴走)ため、温度管理に注意してください。
- デッドタイム: EG2104は内部デッドタイム(約520ns)を保持していますが、高周波PWM駆動時はスイッチング損失による発熱を確認しながら周波数を決定してください。
回路
回路図

PCB

実装後

Parts
54| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 1k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R7, R8, R12, R14 |
| 6 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C3, C4, C6, C7, C8, C9 |
| 5 | CMS11 | Diode_SMD:D_SOD-128 | D4, D7, D8, D9, D10 |
| 4 | 10 | Resistor_SMD:R_0603_1608Metric | R9, R10, R11, R13 |
| 4 | AOD4184A | Package_TO_SOT_SMD:TO-252-2 | Q1, Q2, Q3, Q4 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 3 | 100 | Resistor_SMD:R_0603_1608Metric | R4, R5, R6 |
| 3 | LED | LED_SMD:LED_0603_1608Metric | D1, D2, D3 |
| 3 | TLP152 | Package_SO:SO-5-6_4.55x3.7mm_P1.27mm | IC2, IC3, IC4 |
| 2 | 10u | Capacitor_SMD:C_0603_1608Metric | C10, C11 |
| 2 | 330uF | Capacitor_SMD:CP_Elec_10x10 | C1, C2 |
| 2 | D | Diode_SMD:D_SOD-323 | D5, D6 |
| 2 | IR2302STRPBF | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | IC5, IC6 |
| 2 | power | Connector_AMASS:AMASS_XT30PW-M_1x02_P2.50mm_Horizontal | J2, J3 |
| 1 | 47u | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | Conn | Connector_JST:JST_XA_S04B-XASK-1_1x04_P2.50mm_Horizontal | J1 |
| 1 | L7812 | Package_TO_SOT_SMD:TO-252-2 | U1 |
| 1 | LOGO | LOGO | G*** |
| 1 | motor | Connector_AMASS:AMASS_XT30PW-F_1x02_P2.50mm_Horizontal | J4 |
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Questions
How big is the AltairMD V9 PCB?
It measures 100 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the AltairMD V9 use?
54 parts, built around the IR2302STRPBF, TLP152, L7812 and AOD4184A. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the AltairMD V9 KiCad files?
From the Altairu/AltairMD_V9 repository on GitHub, at the commit this page was made from: the board is AltairMD_V9.kicad_pcb and its schematic AltairMD_V9.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the AltairMD V9 design in my own project?
Its repository states no licence, so its author keeps all rights: ask Altairu before reusing the design.