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NXP Semiconductors |
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UBA20271/2
350 V and 600 V Power ICs for dimmable compact fluorescent
lamps
Rev. 2.1 — 12 October 2011
Product data sheet
1. General description
The UBA20271/2 are high-voltage power ICs intended to drive and control higher
powered self ballasted Compact Fluorescent Lamp (CFL) lighting applications. The
UBA20271/2 operate from 120 V and 230 V. The module includes a half-bridge power
circuit of two NMOST power FETs. In addition, a controller circuit is included that has
advanced features for dimming and a lamp current controlled boost feature. The boost
feature is used for boosting cold (amalgam) CFL.
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 UBA20271/2 are 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
UBA20271: Two internal 350 V, 1.0 max 5.0 A NMOST half-bridge power FETs
UBA20272: Two internal 600 V, 3.0 , max 2.7 A NMOST half-bridge power FETs
Integrated high-voltage level-shift 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
2.4 Dim features
Continuously variable dimming function for standard phase cut dimmers
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www.DataSheet.co.kr
NXP Semiconductors
UBA20271/2
350 V and 600 V Power ICs for dimmable compact fluorescent lamps
Natural dimming curve by logarithmic correction
Adjustable Minimum Dimming Level (MDL)
Controlled lamp ON/OFF
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 from 5 W to 20 W directly
operating from 230 V (UBA20272) and 120 V (UBA20271) mains voltage.
4. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
UBA20271T/N1 SO20
Plastic small outline package; 20 leads; body width 7.5 mm
UBA20272T/N1 SO20
Plastic small outline package; 20 leads; body width 7.5 mm
Version
SOT163-1
SOT163-1
UBA20271_UBA20272
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2.1 — 12 October 2011
© NXP B.V. 2011. All rights reserved.
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