FlyingRC Flagship Stack H7D Pro + 75A AM32

FlyingRC Flagship Stack H7D Pro + 75A ESC is a combination of a flight controller and 4-in-1 ESC suitable for 4-12" drones powered by 3-6S LiPo batteries. The set is aimed at heavier freestyle and long-range builds where a powerful processor and high current headroom are needed.

The flight controller is based on the STM32H743VIT6 processor clocked at 480MHz with 2MB Flash memory and 1MB RAM, combined with a pair of ICM-42688-P gyroscopes. The dual gyroscopes improve measurement accuracy and stability, which is especially noticeable with ArduPilot firmware. Altitude measurement is handled by the DPS310 barometer. The board is equipped with I2C and CAN buses for connecting additional sensors. Analog video is processed by the OSD chip AT7465E. A 6-pin connector is provided for digital video transmitters, and a DJI cable is included in the package. Blackbox data is recorded to a microSD card in the integrated slot, so recording capacity is not limited by the board's memory. There are 7 UARTs and 13 PWM outputs — twelve for motors and servos and one for a WS2812 LED strip. The twelve motor outputs allow two 4-in-1 ESCs to be connected and an eight-motor X8 configuration to be built. Peripheral power is provided by 5V/3A and 9V/3A BECs, while the 9V branch for the video transmitter can be switched on and off via PINIO1 (User1 in Betaflight) — this prevents the video transmitter from overheating during bench setup. An SBUS receiver can be connected to any RX pad, because the H7 processor has an internal inverter.

The board supports  Betaflight, iNav, ArduPilot and PX4 and ships from the factory with Betaflight. The firmware target is FLRC H7D. The firmware is compiled by FlyingRC itself and is not part of public lists; it is downloaded from the manufacturer's website.

The ESC can handle a continuous current of 75A per channel. The ESC is fitted with gold-plated Infineon IRF7480 MOSFETs with an on-state resistance of just 0.95mΩ, whose metal package is in direct contact with the chip, allowing heat to be dissipated effectively. The PCB has 10 layers with 2oz copper and four surface-soldered gold-plated copper bars that help conduct current and reduce resistance and heat generation. Control is handled by a 32-bit QF32F4AK8U7 processor at 120MHz with an integrated ID6288 driver. The ESC uses AM32 firmware, supports DShot150/300/600, OneShot and PWM, and handles sinusoidal startup with high torque at low RPM. It includes a current sensor with scale 100. The included 680uF/35V capacitor and power cable with XT60 connector must be soldered to the ESC.

Both boards have a mounting pattern of 30,5x30,5mm with a mounting hole M4 (M3 with softmount). They are connected with an 8-pin SH1.0 cable.

FlyingRC is a brand of drone and robotics electronics whose development team is based in Singapore.

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