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FPV Electronics > ESC (Electronic Speed Controllers)
High-performance 4-in-1 electronic speed controller utilizing the AT32F421K8U7 ARM Cortex-M4 MCU, designed for 5-8S FPV drones requiring ultra-fast response and robust power delivery.
| Parameter | Specification |
| MCU | AT32F421K8U7 (120MHz Cortex-M4) |
| Continuous Current | 65A/channel (4-in-1 total 260A) |
| Instantaneous current | 65A/channel (10sec) |
| Input Voltage | 3S-8S (12.6-33.2V) |
| PWM Frequency | 8-48kHz (programmable) |
| Protocols | Dshot150/300/600/Multishot/Oneshot/PWM |
| Dimensions | 54×45×8mm |
| Board Weight | 16g |
• MOSFETs: 12 * TPHR8504PL (0.7mΩ Rds(on))
• Capacitance: 30 * 22UF 35V ceramic capacitors + 1000UF electrolytic capacitor
• Power supply: 4 independent power supply LDO, four-way power isolation, ultra-stable operation
• Current Sensing: High-precision ammeter, using stable
• MCU Performance:
• 120MHz clock speed
• Single-cycle 32-bit multiplication
• Hardware floating-point unit
• Update Rate: 32kHz signal processing
• Overcurrent (Hardware + Software)
• Over-temperature (85°C throttle reduction)
• Voltage spike protection (40V transient)
• Motor short-circuit detection
| Feature | Implementation |
| Base Firmware | AM32_AORC_K_A_F421_2.16.hex |
| Startup Time | <0.5s (from power to ready) |
| Main default motor | From 700KV to 3000KV |
| Telemetry | Bi-directional DShot (RPM/voltage) |
| Tuning | ESC-Configurator or Betaflight passthrough |
• 1x 1000UF 35V 10*20mm electrolytic capacitor
• 1x XT60-male 12AWG silicone cable 15cm length
• 1x SH1.0-8pins silicone cable (7cm, reversed)
• 5x M3*8mm shock-absorbing ball