MAD AM32 70A 3-12S 4in1 ESC (AM32 Firmware) STM32L431/432, Telemetry RPM/Temp, DShot150-1200

Overview

MAD AM32 70A 3-12S 4in1 ESC is a 4-in-1 electronic speed controller (4in1 ESC) for 3-12S LiPo input, rated at 70A continuous working current per ESC circuit, using AM32 firmware.

Key Features

• AM32 70A ESC (3-12S, 4in1)
• Infineon aviation-grade MOS (efficient heat dissipation and strong overcurrent capability)
• 4 independent currents: real-time monitoring of working current and voltage
• Online upgrade: directly download firmware from the network
• Imported TDK high-voltage, high-capacity MLCC
• STM32L431 M4 kernel (faster computation speed and motor response)

Specifications

Connection / Pad Labels

• Motor outputs: M1, M2, M3, M4 (Motor 1 to Motor 4)
• Power pads: BAT, GND

Additional Notes

• Each ESC is integrated with a 3-in-1 H-bridge driver.
• Four independent current and voltage detection (flight controller settings require enabling TELEMETRY).
• Imported TDK 35V 22uF high-voltage, high-capacitance MLCC capacitor on board.
• Onboard high-voltage BEC; maximum input voltage of the BEC is 100V (the overall operating voltage of the ESC varies depending on the MOS).
• 8P gold-plated socket for easy connection with an FC ribbon cable.

Performance Comparison (AM32 vs BLHeli32 testing version)

• Real-time telemetry (RPM/Temperature): AM32 fully supported; BLHeli32 (firmware version 4.5) RPM not available.
• Throttle response smoothness: AM32 customizable, more suitable for larger motors; BLHeli32 optimized algorithm.
• Protocol compatibility: Dshot/ProShot/Multishot.
• Note: BLHeli32 has stopped service; for Betaflight 4.5, it cannot support bidirectional DShot. The BL32 test firmware version flash will be stopped in the future.

Firmware

Firmware download address: https://github.com/bitdump/BLHeli/tree/master/BLHeli_32%20AM32

For pre-sales or technical support, contact support@rcdrone.top or visit https://rcdrone.top/.

Details

The AM32 70A 3–12S 4-in-1 ESC uses an STM32L431 MCU with online firmware upgrade support, current sensing, and TDK MLCC capacitors.

The MAD AM32 70A 3–12S 4-in-1 ESC is listed with a 40×43×7 mm board size, 30.5 mm mounting hole spacing, and 3–12S LiPo input range.

The MAD AM32 4-in-1 ESC uses clearly labeled motor pads and BAT/GND terminals to simplify wiring a four-motor build.