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NXP Semiconductors Electronic Components Datasheet

UBA20261 Datasheet

600V and 350V power IC

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UBA20261/2
600 V and 350 V power IC for step dimmable CFLs
Rev. 2 — 10 October 2011
Product data sheet
1. General description
The UBA20261/2 are high-voltage power integrated circuits designed to drive and control
high powered self-ballasted Compact Fluorescent Lamp (CFL) lighting applications
operating at mains supply voltages of 120 V or 230 V. The IC includes a half-bridge power
circuit consisting of two NMOST power MOSFETs, an advanced feature for step dimming
and a lamp current controlled boost feature for boosting cold (amalgam) CFLs.
The controller contains a CFL half-bridge drive function, a high-voltage level-shift circuit
with integrated bootstrap diode, an oscillator function, a current control function for
preheat and burn, a timer function and protection circuits. The UBA20261/2 are supplied
using the dV/dt current charge supply circuit from the half-bridge circuit.
Remark: The mains voltages given in this data sheet are AC voltages.
2. Features and benefits
2.1 Half-bridge features
UBA20261: two internal 350 V, 1 , maximum 5 A NMOST half-bridge power
MOSFETs
UBA20262: two internal 600 V, 3 , maximum 2.7 A NMOST half-bridge power
MOSFETs
Integrated high-voltage level-shifter function with integrated bootstrap diode
2.2 Preheat and ignition features
Coil saturation protection during ignition
Adjustable saturation protection level
Adjustable preheat time
Adjustable preheat current
Ignition lamp current detection
2.3 Lamp boost features
Adjustable boost timing
Fixed boost current ratio of 1.5
Gradually boost to burn transition timing


NXP Semiconductors Electronic Components Datasheet

UBA20261 Datasheet

600V and 350V power IC

No Preview Available !

NXP Semiconductors
UBA20261/2
600 V and 350 V power IC for step dimmable CFLs
2.4 Dim features
4-level step dimming adjustment using a standard on/off mains switch
Adjustable memory retention time for step dimming
Adjustable minimum dimming level
2.5 Protection
OverTemperature Protection (OTP)
Capacitive Mode Protection (CMP)
OverPower Protection (OPP)
OverCurrent Protection (OCP) in both boost and burn states
Power-down function
2.6 Other features
Current controlled operation in both boost and burn state
External power-down option
3. Applications
UBA20261: Step-dimmable compact fluorescent lamps at power levels between 5 W
and 20 W operating at 120 V mains voltage
UBA20262: Step-dimmable compact fluorescent lamps at power levels between 5 W
and 20 W operating at 230 V mains voltage
4. Ordering information
Table 1. Ordering information
Type number Package
Name Description
UBA20261T/N1 SO20 plastic small outline package; 20 leads; body width 7.5 mm
UBA20262T/N1 SO20 plastic small outline package; 20 leads; body width 7.5 mm
Version
SOT163-1
SOT163-1
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.
2 of 32


Part Number UBA20261
Description 600V and 350V power IC
Maker NXP
PDF Download

UBA20261 Datasheet PDF






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