UBA20262 データシートの表示（PDF） - NXP Semiconductors.

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UBA20262

600 V and 350 V power IC for step dimmable CFLs

NXP Semiconductors. 

NXP Semiconductors

UBA20261/2

600 V and 350 V power IC for step dimmable CFLs

7. Functional description

The UBA20261/2 are ICs with integrated half-bridge MOSFETs in self-ballasted

high-power CFLs. The UBA20261/2 have no dimming control input but instead, four

preset fixed dimming levels. Only minor adjustment of the presets is possible.

The UBA20261/2 are rated up to a maximum continuous rectified mains voltage of 350 V

or 500 V, respectively and lamp power-up to 20 W. The UBA20261/2 includes all functions

necessary for preheat, ignition and boost operation of the lamp. In addition, the IC

includes the four-step dimming feature and several protective features to safeguard CFL

operation. The controller states are shown in Figure 3.

VDD = 0

RESET STATE

HOLD = 0

VDD < VDD(rst)

VDD > VDD(rst)

VDD < VDD(rst)

START-UP STATE

VCP < Vth(rel)CP

(1)

POWER-DOWN STATE

PREHEAT STATE

VDD < VDD(stop)

(2)

(3)

preheat time

completed

IGNITION STATE

Ignition_Detected

BOOST AND BURN

STATES

HOLD STATE

HOLD = 1

(4)

(5)

(1) VDD < VDD(start) and (HOLD = 0 OR VCP < Vth(rel)CP).

(2) VDD < VDD(stop).

(3) (End of ignition time AND HOLD = 0) OR VDD < VDD(stop).

(4) End of ignition time AND HOLD = 1.

(5) VCP < Vth(pd)CP, OR overcurrent fault time > 1⁄10 tph OR fbridge(max) detected in capacitive mode.

Fig 3. State diagram

001aam763

UBA20261_UBA20262

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 2 — 10 October 2011

© NXP B.V. 2011. All rights reserved.

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