The UBA2070 is a high voltage integrated circuit for driving electronically ballasted Cold Cathode Fluorescent Lamps (CCFL) at mains voltages up to 277V (RMS). It features current controlled operation, adaptive non-overlap time control, integrated high voltage level shift function, power-down function, protection against lamp failures or lamp removal, and capacitive mode protection.
The UBA2070 is a high‑voltage integrated circuit designed to drive electronically ballasted cold‑cathode fluorescent lamps (CCFL) from mains voltages up to 277 V RMS. It features current‑controlled operation, adaptive non‑overlap time control, integrated level‑shift, oscillator, lamp‑voltage monitoring, and power‑down protection.
The device is offered in a 16‑lead plastic small‑outline package (SOT109‑1) and a 16‑lead DIP package. Detailed pin configurations, functional blocks, and timing diagrams are provided, along with electrical specifications such as supply voltage, oscillator thresholds, and protection limits.
| Oscillator start voltage (Vopthigh) | 12.4 V |
|---|---|
| Oscillator stop voltage (Vopilow) | 8.6 V |
| Maximum bridge frequency | 110 kHz |
| Minimum bridge frequency | 38.9 kHz |
It uses an Adaptive Non‑Overlap circuit that adjusts the non‑overlap duration based on the half‑bridge voltage slope.