iFlight BLITZ ATF435 Stack (E55S 4-in-1 ESC)

The iFlight BLITZ ATF435 Stack pairs a high-performance AT32F435 flight controller with the reliable E55S 55A 4-in-1 ESC. Built around the ArteryTek AT32 MCU, this stack delivers processing power that rivals or exceeds traditional F7 boards, allowing for maximum loop rates and complex filter counts without maxing out CPU load. The standard 30.5x30.5mm mounting pattern and robust 55A ESC output make it highly suited for aggressive 5-inch freestyle quads, 7-inch long-range platforms, and mid-sized cinelifters.

Key features

• Next-Gen Processing: The AT32F435 processor handles heavy Betaflight filtering tasks effortlessly.
• Heavy-Duty Power: The E55S ESC delivers 55A continuous (65A burst) for demanding motors and heavy payloads.
• HD Ready: Direct plug-and-play connector for the DJI O3 Air Unit, Walksnail Avatar, or HDZero VTX.
• Generous Storage: 32MB onboard flash memory for extensive Blackbox logging and tuning.
• Clean Dual BECs: 5V and 9V outputs reliably power receivers, LEDs, and high-draw digital video transmitters.

Specifications

• MCU: AT32F435CGU7
• Gyro: ICM42688 (boards made before November 2023 used a BMI270)
• Barometer: DPS310
• OSD: AT7456E
• Input Voltage: 3-6S LiPo (10.5V to 25.2V)
• ESC Continuous Current: 55A
• ESC Burst Current: 65A
• ESC MCU: BB21
• UARTs: 6
• BEC: 5V/2.5A, 9V/2A
• Blackbox: 32MB
• Mounting Size: 30.5x30.5mm (4mm hole with 3mm grommets)
• FC dimensions: 36.5 x 35 mm
• Weight: FC 7.8 g, ESC 14.7 g
• Supported Firmware: Betaflight

Note: The AT32F435 processor requires Betaflight 4.4.3 or newer. Ensure you select the correct AT32 firmware target when flashing via the Betaflight Configurator.