UBA20272T

600 V Power IC for dimmable compact fluorescent lamps


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The UBA20272 is a high voltage Power IC intended to drive and control high power self ballasted dimmable Compact Fluorescent Lamps (CFL) for 230V mains. The UBA20272 includes a half-bridge power circuit made up of two NMOST power FETs with advanced features for dimming and a lamp current controlled boost feature for boosting cold (amalgam) CFL lamps. The controller contains a half-bridge drive function, including a high voltage level-shift circuit with integrated bootstrap diode, an oscillator function, a current control function both for preheat and burn, timer function and protection circuits. The UBA20272 is supplied via a high-efficient dV/dt supply circuit.

Features and benefits

  • Two internal 600 V, 3.0 Ω, max 2.7 A NMOST half-bridge power FETs
  • Integrated high voltage level-shift function with integrated bootstrap diode
  • Coil saturation protection during ignition
  • Adjustable saturation protection level
  • Adjustable preheat time
  • Adjustable preheat current
  • Ignition lamp current detection
  • Adjustable boost timing
  • Fixed boost current ratio of 1.5
  • Gradually boost to burn transition timing
  • Continuously variable dimming function for standard phase cut dimmers
  • Natural dimming curve by logarithmic correction
  • Adjustable Minimum Dimming Level (MDL)
  • Controlled lamp ON/OFF
  • Current controlled operating in boost and burn state
  • External power-down function
  • Lamp flicker suppression
  • OverCurrent Protection (OCP) in boost and burn state
  • Capacitive Mode Protection (CMP)
  • OverPower Protection (OPP)
  • Power-down function
  • OverTemperature Protection (OTP)

Applications

  • Dimmable compact fluorescent lamps for power levels from 5 W to 20 W
All information on this product information page is subject to the subsequent disclaimers:
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Show functional diagram

Block diagram UBA20271/2
Block diagram UBA20271/2

Parametrics of this product

SymbolParameterConditionsMinTyp/NomMaxUnit
VDHSvoltage on pin DHSduring 1 s600V
VDHSvoltage on pin DHSoperating500V
VDDsupply voltage14V
Ronon-state resistanceHigh Side33.6Ω
Ronon-state resistanceLow Side33.6Ω
Tjjunction temperature-40150°C
Plamplamp power20W
Vmainsmains voltage230V

Products / Packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
UBA20272T/1UBA20272T/1,5189352 953 23518Volume productionSOT163-1
(SO20) 		Reel Dry Pack, SMD, 13"Standard Marking

Pinning information

PinSymbolDescriptionSimplified outlineGraphic symbol
1SLSsource low-side switchPin configuration UBA20271/2 (SO20)3d outline
2SLSsource low-side switch
3SLSsource low-side switch
4LSATcoil saturation level input
5PGNDpower ground
6VDDlow voltage supply
7RREFinternal reference current input
8CFvoltage controlled oscillator capacitor
9MDLminimum dimming level input
10CIvoltage controlled oscillator input integrating capacitor
11CSIcurrent feedback sense input
12DCIdimming level input
13CPpreheat timing capacitor
14CBboost timing capacitor
15SGNDsignal ground
16FSfloating supply voltage
17HBOhalf-bridge output
18DHShigh voltage supply
19HBOhalf-bridge output
20HBOhalf-bridge output

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
UBA20272T/1UBA20272T/1,518UBA20272T/1Always Pb-free33
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Documentation for this product

TypeFormatTitleDate
Data sheetpdf350 V and 600 V Power ICs for dimmable compact fluorescent lamps (v.2.1)2011-10-12
Application notepdfSMPS EMC and layout guidlines (v.1.0)2011-02-18
Application notepdfDimmable CFL using the UBA2027X family (v.1.0)2011-08-15
Application notepdfTriac dimmable CFL application using the UBA2028/UBA2014/UBA2027x (v.2.0)2012-02-27
LeafletpdfNXP GreenChip lighting driver ICs UBA2026x and UBA2027x (v.1.0)2012-01-30
LogogifGreenChip logo (v.1.0)2012-04-20
ReportpdfSmart lighting: A bright idea whose time has come (v.1.0)2011-12-20

Ordering & availability

Type numberOrdering code(12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
UBA20272T/19352 953 23518UBA20272T/1,518NADIGI-KEY CORPORATION4,0005/23/2012Buy online 
   NAFUTURE ELECTRONICS205/22/2012Buy online 
   EUFUTURE ELECTRONICS UK205/22/2012Buy online 
   ASIAFUTURE ELECTRONICS- ASIA205/22/2012Buy online 

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