onsemi FAN7710SN

The FAN7710 is a ballast control integrated circuit (IC) for a compact fluorescent lamp (CFL). The FAN7710 controls internal high-voltage stress and delivers 20W to the lamp at 310V DC voltage. It incorporates a preheating / ignition function, controlled by an user-selected external capacitor, to increase lamp life. The FAN7710 detects switch operation from after ignition-mode through an internal active Zero-Voltage Switching (ZVS) control circuit. This control scheme enables the FAN7710 to detect an open-lamp condition, without the expense of external circuitry, and prevents stress on MOSFETs. The high-side driver built into the FAN7710 has a commonmode noise cancellation circuit that provides robust operation against high-dv/dt noise intrusion.

• Integrated Half-Bridge MOSFET
• Floating Channel for Bootstrap Operation up to +550V
• Low Start-up and Operating Current: 120μA, 2.6mA
• Under-Voltage Lockout with 1.8V of Hysteresis
• Adjustable Run Frequency and Preheat Time
• Internal Active ZVS Control
• Internal Protection Function (No Lamp)
• Internal Clamping Zener Diode
• High Accuracy Oscillator
• Soft-Start Functionality

• Compact Fluorescent Lamp Ballast