The UBA201x is a family of high voltage Integrated Circuit (IC) intended to drive fluorescent lamps with filaments such as Tube Lamps (TL) and Compact Fluorescent Lamps (CFL) in general lighting applications. The IC comprises a fluorescent lamp control module, a half-bridge driver and several protection mechanisms. The UBA2015 parts additionally have a built-in critical conduction mode Power Factor Correction (PFC) controller/driver. The IC drives fluorescent lamp(s) using a half-bridge circuit made of two MOSFETs with a supply voltage of up to 600 V. The UBA201x family of IC's are designed to be supplied by a start-up bleeder resistor and a dV/dt supply from the half-bridge circuit, or any other auxiliary supply derived from the half-bridge or the PFC. The supply current of the IC is low. An internal clamp limits the supply voltage.
Feature
- Integrated level-shifter for the high-side driver of the half-bridge
- Integrated bootstrap diode for the high-side driver supply of the half-bridge
- Independent non-overlap time
- EOL (End-Of-Life) detection (both symmetrical and asymmetrical)
- Adjustable preheat time
- Adjustable preheat current
- Lamp ignition failure detection
- Ignition detection of all lamps at multiple lamps with separate resonant tanks
- Adjustable fixed frequency preheat
- Second ignition attempt if first failed
- Constant output power independent of mains voltage variations
- Automatic restart after changing lamps
- Lamp current control
- Enable input
- Hard switching/capacitive mode protection
- Half-bridge overcurrent (coil saturation) protection
- Lamp overvoltage (lamp removal) protection
- Temperature protection
- PFC controller (UBA2015 only):
- Integrated 4-pin critical conduction mode PFC controller/driver
- Open and short pin-short protection on PFC feedback pin
- Overcurrent protection
- Overvoltage protection
- Non dimmable fluorescent HF-TL ballasts with and without PFC
