FAN48695UC190X

FAN48695UC190X is a member of the FAN48695 family from Fairchild/On Semiconductor. It is an offline flyback controller intended for LED-driver and small off-line power-supply applications. The device provides high-voltage startup, current-mode flyback regulation, and protection features (overcurrent/short-circuit, undervoltage). It is commonly used to implement constant-current LED drivers and may support dimming (PWM or other control methods) on the primary side. The UC190X suffix denotes a specific packaging variant, so exact pinout, HV rating, and whether an integrated switch/MOSFET is included must be confirmed in the official datasheet for FAN48695UC190X. Typical applications include AC-DC adapters and LED lighting drivers in the several-watt to tens-of-watts range. For precise specifications (voltage range, start-up current, control topology, dimming interface, protections), consult the official datasheet and application notes.

- Pin count: 8 pins (UC package variant).
- Function: High‑voltage offline switcher controller with an integrated MOSFET for flyback SMPS; provides current‑mode PWM control, startup, protection (OC/UVLO/OVP), and regulation for power adapters.

- Manufacturer: ON Semiconductor (ONsemi), an American multinational semiconductor company (formerly Fairchild Semiconductor; Fairchild was acquired by ON Semiconductor in 2016).
- What kind of company: A global designer, manufacturer, and supplier of integrated circuits and other semiconductor devices for automotive, industrial, communications, consumer electronics, and related markets.

- Off-line flyback switch-mode power supplies (isolated)
- LED lighting drivers (constant-current, isolated)
- AC–DC adapters and wall-wart supplies
- Small to medium‑power telecom and industrial power supplies
- Battery chargers and handheld/portable device chargers
- Any energy‑efficient isolated supply requiring primary‑side regulation, dimming control, and low standby power

8-pin UQFN (ultra-compact QFN) package, about 2.9 × 3.0 mm. The “UC” suffix indicates the UQFN package; “190X” is a date/lot code.