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G474-HLite Flybarless Flight Controller
Brand: Matek
Product Code: G474-HLITE
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G474-HLite Flybarless Flight Controller
Description
1. Product Summary
1.1. Product Description
The Matek Systems G474-HLite is a compact, high-performance flybarless flight controller designed for RC helicopters. Powered by the STM32G474CE microcontroller and equipped with advanced sensors including the ICM42688-P IMU and SPL06 barometer, this unit delivers fast response, precise control, and smooth flight stabilization. It supports Rotorflight firmware and provides multiple UARTs, PWM outputs, and blackbox logging — all in a lightweight 9-gram form factor.
1.2. Product Features
- MCU: STM32G474CE, 170 MHz Cortex-M4 core with 512 kB Flash memory.
- IMU: ICM42688-P gyro/accelerometer for superior flight stability.
- Barometer: SPL06 pressure sensor for precise altitude control.
- Blackbox: 128 MB onboard NAND memory for flight data recording.
- USB-C interface for easy configuration and firmware updates.
- 3.5 UART ports and up to 6 PWM outputs for servos and motor control.
- Wide input voltage range: 4.5 V – 14 V (2S–4S LiPo compatible).
- Compact size (30 × 23 × 13 mm) with vibration-damping 16 × 16 mm mount.
- Low static current draw: ~60 mA @ 5 V.
- Rotorflight firmware support for flybarless helicopter systems.
1.3. Applications
- RC Helicopters: Flybarless flight stabilization and control.
- UAV Research: Small-scale aircraft requiring precise flight feedback.
- Prototyping: Lightweight platforms needing advanced IMU & data logging.
- Educational Robotics: Motion-stabilized control experiments.
2. Technical Specifications
Table 2-1. G474-HLite Flight Controller Specifications
| Manufacturer | Matek Systems |
| Model | G474-HLite Flybarless Flight Controller |
| Microcontroller | STM32G474CE, 170 MHz Cortex-M4, 512 kB Flash |
| IMU (Gyro/Accel) | ICM42688-P |
| Barometer | SPL06 Digital Pressure Sensor |
| Blackbox Storage | 128 MB NAND Flash |
| UART Ports | 3.5 UARTs (UART1, UART3, UART4 + UART2 Rx) |
| PWM Outputs | 6 (4x servo, 1x motor, 1x RPM input) |
| Input Voltage | 4.5 V – 14 V (2S–4S LiPo) |
| Power Consumption | ~60 mA @ 5 V |
| Operating Temperature | –20 °C ~ +80 °C |
| Dimensions | 30 × 23 × 13 mm |
| Mounting Pattern | 16 × 16 mm (Ø4 mm / Ø3 mm with grommets) |
| Weight | ≈ 9 g (without pins) |
| USB Interface | USB Type-C |
| Firmware | Rotorflight (Target: MATEKG474HELI) |
3. Electrical Characteristics
Table 3-1. Power and Signal Parameters
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 4.5 | 7.4 | 14.0 | V |
| Operating Current | – | 60 | 75 | mA |
| BEC Output | – | 5.0 V / 1.5 A | – | – |
| Logic Voltage | 3.3 | – | 5.0 | V |
4. Mechanical Characteristics
Table 4-1. Physical Parameters
| Board Dimensions | 30 × 23 × 13 mm |
| Mounting Pattern | 16 × 16 mm (Ø4 mm / Ø3 mm with grommets) |
| Weight | ≈ 9 g (without header pins) |
| Connector Type | Standard solder pads and USB-C interface |
NOTE: For best vibration isolation, use soft silicone grommets and ensure correct flight orientation.
5. Integration and Usage
5.1. Setup Instructions
- Flash the latest Rotorflight firmware (Target: MATEKG474HELI) via USB-C.
- Connect servos and motor ESCs to PWM outputs 1–6 as configured in software.
- Use UART ports for telemetry, SBUS, CRSF, or GPS peripherals.
- Provide clean power via the “Vx” pad (4.5–14 V) or 5 V BEC output.
- Perform gyro calibration before first flight and check orientation alignment.
5.2. Typical Applications
- RC helicopter flybarless stabilization systems.
- Compact UAVs requiring high-precision flight control.
- Test platforms for Rotorflight firmware development.
- Hobbyist and professional helicopter projects.
6. Environmental Conditions
Table 6-1. Environmental Ratings
| Operating Temperature | –20 °C ~ +80 °C |
| Storage Temperature | –40 °C ~ +90 °C |
| Humidity | 5 % – 95 % (non-condensing) |
7. Precautions
- Ensure correct polarity when connecting power to avoid damage.
- Do not power via USB-C and Vx pad simultaneously.
- Use vibration isolation mounts to protect the IMU sensor.
- Keep the controller away from magnetic and high-current components.
- Calibrate sensors and servos before each maiden flight.
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