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Standard Stack: F722 FC + 85A ESC 4-in-1 30x30

FPV Electronics > Stack & AIO

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Professional-grade flight control and power system engineered for 5-7" performance FPV drones, combining STM32F722 processing capabilities with high-current ESC architecture in a robust 30×30mm stackable form factor.
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Standard Stack: F722 FC + 85A ESC 4-in-1 30x30 Technical Brief

System Overview

Professional-grade flight control and power system engineered for 5-13" performance FPV drones, combining STM32F722 processing capabilities with high-current ESC architecture in a robust 30×30mm stackable form factor.

1. Flight Controller Specifications

ParameterSpecification
MCUSTM32F722VET6 (216MHz Cortex-M7)
IMUICM-42688-P + BMI270 (dual SPI, 32kHz gyro)
Blackbox32MB Flash (32kHz logging)
Input Voltage2-8S LiPo (7.4-33.6V)
BEC Outputs5V@3A + 9V@3A + VBAT
Connectivity6x UART, 2x I²C, 1x CANbus, 1x Bluetooth
USB InterfaceType-C with ESD protection
OSD ChipAT7456E (Betaflight OSD) with 4K resolution
Board Size37×37mm
Board Weight11.5g

2. 75A 4-in-1 ESC Specifications

ParameterSpecification
MCUSTM32G431KB (170MHz Cortex-M4)
Continuous Current85A/channel (300A peak)
Burst Current110A/channel (5 seconds)
ProtocolsDShot150/300/600, Proshot32, PWM, Oneshot42
Input Voltage2-8S LiPo (7.4-33.6V)
Current Sensor±1% accuracy hall sensors
Board Size30×30mm
Board Weight30.8g

3. Combined Features

Power System

  • • Ultra-Low ESR Capacitance: 18×100μF MLCC array + 1000μF electrolytic

  • • Surge Protection: 40V TVS 

  • • Triple-Stage Filtering: LC-π filter for gyro/video systems

  • • Stackable Design: 30×30mm mounting with M3 screws + anti-vibration grommets

Integration

  • • Digital VTX Support: 9V/3A regulated outputs for DJI/HDZero

  • • Bi-Directional Telemetry: ESC bidirectional telemetry is achieved through a serial port

  • • Barometric Altitude Hold: BMP280 barometer with foam isolation

4. Safety Features

Flight Controller Protections

Protection TypeSpecificationImplementation
Voltage Spike Protection40V transientTVS diode array + active clamping
Gyro Vibration DampingReduces >10kHz vibrations by 95%dynamic notch filters
Single power input, 2S-8SVBAT-2S-8S-VoltagePriority-based MOSFET switching

ESC Protections

Protection TypeThresholdResponse TimeTrigger Condition
Hardware Overcurrent100A per channel≤1.5 secondsMOSFET desaturation detection
Short CircuitHardware isolation<25μsPhase-phase/phase-ground
Over-temperature115°C (MOSFET)<200μsThermal runaway prevention
Low Voltage CutoffConfigurable 2.8-3.6V/cell<80msSmart battery preservation

5. Accessories Package

  • • 1x SH1.0-8pins silicone cable (7cm, reversed)

  • • 1x SH1.0-6pins silicone cable (12cm, reversed)

  • • 1x SH1.0-4pins silicone cable (12cm, reversed)

  • • 1x SH1.0-3pins silicone cable (10cm, reversed)

  • • 1x SH1.0-2pins silicone cable (12cm, single-end

  • • 5x M3*10mm shock-absorbing balls

  • • 1x 1000UF 35V 10*20mm electrolytic capacitor.

  • • 1x XT60-male 12AWG silicone cable 15cm length.

  • • 5x M3*8mm shock-absorbing balls

6. Connection Diagram

7221.png

7222.png

85A4IN1 ESC1.png

85A4IN1 ESC2.png

 

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