FAN3183BMX

FAN3183BMX is a dual fast MOSFET gate-driver IC (FAN family) from Fairchild/On Semiconductor. It provides two buffered outputs to drive a high-side and a low-side N-channel MOSFET in a half-bridge configuration. The device typically uses a bootstrap supply for the high-side, and includes protections (e.g., undervoltage lockout, shoot-through minimization) to improve efficiency and reliability. Common applications include driving MOSFETs in switching power supplies, DC-DC converters, motor drives, and inverters. The “MX” suffix indicates a specific package (such as MSOP-8/SOIC-8) and pinout variant. For exact electrical specs, timing, input thresholds, and pin configuration, refer to the official FAN3183BMX datasheet from the manufacturer. If you’re replacing or selecting it, ensure it fits your voltage, timing, and package requirements.

Here are the typical features of the FAN3183BMX (an 8-pin, high-voltage offline PWM controller in MSOP/8-pin package):
- Off-line switch-mode controller for flyback/SMPS
- High-voltage startup current source and Vcc regulator
- Current-mode PWM with slope compensation
- Fixed-frequency operation (tunable via external components; typical tens of kHz)
- Soft-start to limit inrush and output overshoot
- Overcurrent/short-circuit protection with hiccup behavior
- Overtemperature protection
- Undervoltage lockout (UVLO) and protection against brown-out
- Enable/shutdown input and optocoupler-feedback compatibility
- Built-in reference and protection features, suitable for compact adapters/PSUs
- Lead-free variant in an 8-pin BMX package
Note: exact electrical specs (e.g., input range, protection thresholds, frequency) are datasheet dependent. For precise values, please consult the FAN3183BMX datasheet.

- Pin count: 8 pins (MSOP-8/SOIC-8 package variants).
- Function: MOSFET gate driver for switching regulators (drives high-side/low-side N-channel MOSFETs in DC-DC power supplies).

- Manufacturer: ON Semiconductor (the FAN3183BMX originates from Fairchild Semiconductor, now part of ON Semiconductor).
- What kind of company: A global semiconductor company that designs, manufactures, and sells integrated circuits and discrete components (including power management and analog/mixed-signal ICs) for automotive, industrial, and consumer markets.

FAN3183BMX is a three‑channel MOSFET gate‑driver IC (high‑side/low‑side capable) used to drive three N‑channel power MOSFETs in switch‑mode power supplies and motor drives. It provides fast, matched gate drive with typical protection features.
Common applications:
- Three‑phase BLDC or stepper motor driver systems
- Synchronous buck/boost, flyback, and full‑bridge DC‑DC converters
- Automotive/industrial power‑management modules with three independent gate drivers
- Power distribution and hot‑swap controllers in multi‑switch topologies

8-pin surface-mount package: SOIC-8 (SOP-8).