The UBA2071 and UBA2071A are high voltage ICs intended to drive Cold Cathode Fluorescent Lamps (CCFLs) or External Electrode Fluorescent Lamps (EEFLs) for backlighting applications. They can drive a half bridge circuit made up of two NMOSFETs with a supply voltage of up to 550 V, so the inverter can be supplied directly from a 400 V PFC bus.
The UBA2071 and UBA2071A contain a controller, a level shifter, a bootstrap diode and drivers for the external half bridge power switches. It also contains a low frequency PWM generator, which can be used to control the brightness level of the lamps, using an analog brightness/dimming control voltage. PWM dimming can also be realized, using a digital PWM input signal. PWM dimming can be synchronized with other ICs. The lamp current is controlled by means of a true zero voltage switching resonant control principle, ensuring lowest possible switch losses in the half bridge power structure.
The UBA2071 is designed to be supplied by a ΔV/Δt supply from the half bridge circuit that it drives. The IC itself needs little current and if the IC is off, a clamp protects the supply voltage from getting too high.
The UBA2071A is designed to be supplied by a fixed 12 V supply. It has a lower supply start voltage and no supply clamp.
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| UBA2071AT/N1 | UBA2071AT/N1,118 | 9352 857 76118 | Volume production | SOT137 | Reel Pack, SMD, 13" | Standard Marking | |
| UBA2071ATS/N1 | UBA2071ATS/N1,118 | 9352 857 77118 | Volume production | SOT340-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking |
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| UBA2071AT/N1 | UBA2071AT/N1,118 | UBA2071AT_N1 |
| Always Pb-free | ||||
| UBA2071ATS/N1 | UBA2071ATS/N1,118 | UBA2071ATS_N1 |
| Always Pb-free |
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| UBA2071AT/N1 | 9352 857 76118 | UBA2071AT/N1,118 | ASIA | WPI | 8,000 | 1000 | 11/19/2009 | Buy online | not available | |
| UBA2071ATS/N1 | 9352 857 77118 | UBA2071ATS/N1,118 | not available |