UBA20271 データシートの表示（PDF） - NXP Semiconductors.
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UBA20271 Datasheet PDF : 33 Pages
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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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