Using the FAN 7710 Ballast Control IC for Compact Fluorescent Lamps
developed using Fairchild’s unique highvoltage process and
system-in-package (SiP) concept can be designed a very simple low cost
fluorescent lamp driver electronic project .The FAN7710 ballast control
controls internal high-voltage stress and delivers 20W to the lamp at
320VDC voltage.
FAN7710 ballast control 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.
Simple FAN 7710 Ballast Control Circuit Diagram
The AC line input
voltage (230 VAC 50 Hz) is rectified to provide a bus voltage of
approximately 320 volts DC. Startup resistor R1 supplies initial power
to the FAN7710 IC.The IC begins to oscillate and the charge pump circuit
consisting of C2, D2 and D7 supplies the current to the VDD pin, which
gets regulated through the internal 15-V shunt regulator.
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