FAN7711N - Ballast Control DIP8

Features
• Floating Channel for Bootstrap Operation to +600V
• Low Start-up and Operating Current: 120μA, 3.2mA
• Under-Voltage Lockout with 1.8V of Hysteresis
• Adjustable Run Frequency and Preheat Time
• Internal Active ZVS Control
• Internal Protection Function (Latch Mode)
• Internal Clamping Zener Diode
• High Accuracy Oscillator
• Soft-Start Functionality

Applications
• Electronic Ballast

Description
The FAN7711, developed with Fairchild’s unique high-
voltage process, is a ballast control integrated circuit (IC)
for a fluorescent lamp. FAN7711 incorporates a preheating
/ ignition function, controlled by an user-selected external
capacitor, to increase lamp life. The FAN7711 detects
switch operation from after ignition mode through an
internal active Zero-Voltage Switching (ZVS) control
circuit. This control scheme enables the FAN7711 to
detect an open-lamp condition, without the expense of
external circuitry, and prevents stress on MOSFETs. The
high-side driver built into the FAN7711 has a common-
mode noise cancellation circuit that provides robust
operation against high-dv/dt noise intrusion.