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NXP Semiconductors Electronic Components Datasheet

UBA20270 Datasheet

600V Driver IC

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UBA20270
600 V Driver IC for dimmable compact fluorescent lamps
Rev. 2 — 8 September 2011
Product data sheet
1. General description
The UBA20270 is a high-voltage power IC intended to control higher powered self
ballasted Compact Fluorescent Lamp (CFL) lighting applications. The UBA20270 is a
controller circuit with advanced features for dimming and has a lamp current controlled
boost feature for boosting cold (amalgam) CFLs.
The controller contains a half-bridge drive function for CFL, a high-voltage level-shift
circuit with integrated bootstrap diode. In addition, the controller contains an oscillator
function, a current control function both for preheat and burn, a timer function and
protection circuits. The UBA20270 is supplied via a dV/dt current charge supply circuit
from the half-bridge circuit.
Remark: Mains voltages noted are AC.
2. Features and benefits
2.1 Half-bridge features
Integrated high-voltage level-shift function with integrated bootstrap diode
2.2 Preheat and ignition features
Coil saturation protection during ignition
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
2.4 Dim features
Continuously variable dimming function for standard phase cut dimmers
Natural dimming curve by logarithmic correction
Adjustable Minimum Dimming Level (MDL)
Controlled lamp ON/OFF


NXP Semiconductors Electronic Components Datasheet

UBA20270 Datasheet

600V Driver IC

No Preview Available !

NXP Semiconductors
UBA20270
600 V Driver IC for dimmable compact fluorescent lamps
2.5 Protection
OverCurrent Protection (OCP) in boost and burn state
Capacitive Mode Protection (CMP)
OverPower Protection (OPP)
Power-down function
OverTemperature Protection (OTP)
2.6 Other features
Current controlled operating in boost and burn state
External power-down function
Lamp flicker suppression
3. Applications
Dimmable compact fluorescent lamps for power levels above 20 W and for universal
mains voltages.
4. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
UBA20270T/N1 SO16
Plastic small outline package; 16 leads; body width 3.9 mm
Version
SOT109-1
UBA20270
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 8 September 2011
© NXP B.V. 2011. All rights reserved.
2 of 32


Part Number UBA20270
Description 600V Driver IC
Maker NXP
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UBA20270 Datasheet PDF






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