Description:
The UC3872 is a resonant lamp ballast controller optimized for driving cold cathode fluorescent, neon, and other gas discharge lamps. The resonant power stage develops a sinusoidal lamp drive voltage, and minimizes switching loss and EMI generation. Lamp intensity adjustment is accomplished with a buck regulator, which is synchronized to the external power stage’s resonant frequency.
Other features include a precision 1.2% reference, undervoltage lockout, and accurate minimum and maximum frequency control.
UC3872 family of resonant lamp drivers contains all of the necessary control circuitry to implement a highly efficient, cold-cathode. fluorescent back-light driver. This design note describes how to modify the circuit to accommodate a floating-lamp topology.
Application:
Automotive
Battery powered applications
Features:
Operating voltage: 4.5 V ~ 24 V
Operating Temperature: 0°C ~ 70°C
Device Package: 16-SOIC
Current - Output: 500mA
Frequency: 57kHz ~ 78kHz