描述 Description

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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.

特性 Features

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

應用 Application

Non dimmable fluorescent HF-TL ballasts with and without PFC