UBA20270T

600 V Driver IC for dimmable compact fluorescent lamps


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The UBA20270 is a high voltage IC, to be used with two external NMOS power FETs, intended to control high power self ballasted dimmable Compact Fluorescent Lamps (CFL). The UBA20270 has 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 UBA20270 is supplied via a high-efficient dV/dt supply circuit.

Features and benefits

  • Coil saturation protection during ignition
  • 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
  • Integrated high voltage level-shift function with integrated bootstrap diode
  • 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 above 20 W and for universal mains voltages
All information on this product information page is subject to the subsequent disclaimers:
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Show functional diagram

Block diagram (UBA20270)
Block diagram (UBA20270)

Parametrics of this product

SymbolParameterConditionsMinTyp/NomMaxUnit
VHBOvoltage on pin HBOoperating500V
VHBOvoltage on pin HBOduring 1 s600V
VDDsupply voltage14V
Tjjunction temperature-40150°C
Plamplamp power150W
Vmainsmains voltage120230V

Products / Packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
UBA20270T/1UBA20270T/1,5189352 953 21518Volume productionSOT109-1
(SO16) 		Reel Dry Pack, SMD, 13"Standard Marking

Pinning information

PinSymbolDescriptionSimplified outlineGraphic symbol
1SLSsource low-side switch inputPin configuration (SO16)SOT109-1
2GLSlow-side gate driver output
3PGNDpower ground
4VDDlow voltage supply
5RREFinternal reference current input
6CFvoltage controlled oscillator capacitor
7MDLminimum dimming level input
8CIvoltage controlled oscillator input integrating capacitor
9CSIcurrent feedback sense input
10DCIdimming level input
11CPpreheat timing capacitor
12CBboost timing capacitor
13SGNDsignal ground
14FSfloating supply voltage
15HBOhalf-bridge output
16GHShigh-side gate driver output

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
UBA20270T/1UBA20270T/1,518UBA20270T/1Always Pb-free33
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Quality and reliability disclaimer

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Documentation for this product

TypeFormatTitleDate
Data sheetpdf600 V Driver IC for dimmable compact fluorescent lamps (v.2.0)2011-09-08
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
UBA20270T/19352 953 21518UBA20270T/1,518NADIGI-KEY CORPORATION5,0005/23/2012Buy online 
   NAFUTURE ELECTRONICS205/22/2012Buy online 
   EUFUTURE ELECTRONICS UK205/22/2012Buy online 
   ASIAFUTURE ELECTRONICS- ASIA205/22/2012Buy online 
   NANEWARK/ELEMENT14105/23/2012Buy online 
   EUFARNELL105/23/2012Buy online 
   ASIAELEMENT14 APAC105/23/2012Buy online 
   ASIASACL - Hong Kong/Chinayes250005/01/2012Buy online 

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