SX Chip – What is it in Vaping?

Definition

The SX Chip is a proprietary computer chip designed by Yihi that sits at the heart of many high-end vape mods. In simple terms, it is the “brain” that reads your CoilResistance“>coil resistance, controls power delivery, regulates temperature, and keeps the device safe while you vape. Whether you are running a sub-ohmtank or a Mod“>squonk mod, the SX Chip translates your settings into precise electrical output so you get the exact flavour, warmth, and cloud density you expect—without needing an electrical engineering degree.

Technical Details

Inside the mod, the SX Chip uses a 32-bit ARM processor to sample coil resistance every few microseconds, then applies Pulse Width Modulation (PWM) or direct DC-DC buck/boost circuits to deliver set wattage (1–200 W in most models, up to 550 W on SX550). Temperature control modes support Ni200, Ti, SS316, and custom TCR values (0.00050–0.00300). Accuracy is ±0.02 Ω for resistance and ±5 °C for temperature. Firmware upgrades are done via Yihi SxMini software on Windows or macOS. Common versions include the SX350J-V2 (75 W), SX450J (200 W), and the newest SX550J with Bluetooth and short-circuit protection rated at 45 A. All boards include reverse-polarity, over-discharge, and 10-second cut-off safeguards.

Usage & Tips

• First-time setup: After inserting batteries, lock resistance at room temperature before attaching a Kit“>starter kit tank.
• TC mode tip: Dry-burn your coil lightly, let it cool, then “set resistance” for best accuracy; steepinge-liquid won’t affect the chip, but clean contacts will.
• Common issue: “Check atomiser” reading—clean the 510 pin and ensure the coil isn’t shorted.
• Safety: Never exceed the board’s continuous amp limit; use authentic high-drain 18650/21700 cells and inspect wraps for nicks.
• Firmware updates: Check Yihi’s site monthly; newer firmware often adds coil material profiles and tighter battery efficiency.

History & Context

Yihi released the first SX350 board in 2013, giving hobbyists a reliable alternative to early DNA chips. Continuous updates turned SX boards into staple choices for Australian builders seeking temperature control in sub-ohm and squonk setups, cementing the SX Chip’s reputation for accuracy, safety, and power.