NXP GreenChip lighting driver ICs UBA2026x & UBA2027x Deep-dimming CFL driver ICs with boost function These dimmable CFL drivers and power ICs, based on NXP’s proven GreenChip technology, enable next-generation dimmable CFLs that deliver incandescent dimming performance with CFL efficiency. Key features: UBA2027x } Robust, deep-dimmable solution for most leading- and trailing-edge phase cut dimmers (benchmark performance) } Natural dimming curve by logarithmic correction NXP’s UBA2026x and UBA2027x devices allow the lamp manufacturer to meet or exceed the latest SuperCFL specifications, as well as the Energy Star and EU regulations. Key features: UBA2026x } Four-level step dimming adjustment using a standard on/off mains switch } Adjustable memory retention time for step dimming The UBA2027x family suits retrofit CFL designs based on existing triac- or transistor-based wall dimmers. These ICs emulate a natural dimming curve using logarithmic correction together with an adjustable minimum deep dimming level down to 2%. Shared features } Boost function for shorter run-up time } Fixed boost ratio of 1.5 times after ignition } Adjustable boost timing } Accurate adjustable in current and time preheat function to extend number of switching cycles } Adjustable minimum dimming level } Meet and exceed SuperCFL specifications The UBA2026x family provides an easy-to-use “step-dimmable” solution. The ICs feature an adjustable memory retention time and an adjustable minimum dimming level, and dim in four defined steps by simply toggling the standard on-off switch. Both families include dedicated devices for 120 V and for 230 V mains voltages. Housed in an SO20 package and incorporating half-bridge MOSFETs, they offer very high integration for lamps up to 20 W. The devices are also available in a controlleronly SO16 package, without these half-bridge MOSFETs, so designers can use two external MOSFETs for higher lamp powers and greater design flexibility. integrated preheat function maximizes the number of switching cycles and consequently delivers longer lamp lifetimes. Bulbs based on these ICs can reach lifetimes well above standard CFL expectations, with over 15,000 hours of use and up to 100,000 on/off switching cycles. Several “smart” features improve performance in CFLs. The UBA2027x contains special circuitry to enable flicker-free deep dimming; this is a dedicated feature for TRIAC dimmable systems, which is not present in generic CFL/TL controller ICs. A unique “boost” system accelerates lamp warm-up for up to three minutes, enabling a fully bright light in less time. Also, an Design tools The ICs are supported by special software tools that calculate the right component values based on customer requirements and lamp characteristics. Demo boards and samples are also available; please contact NXP for details. Selection guide: Triac dimming Integrated NMOS power FET Boost Package 120/230 V - Yes SO16 120 V 2 x 350 V/1 Ω Yes SO20 230 V 2 x 600 V/3 Ω Yes SO20 Product Description Mains UBA20270 Controller IC for triac dimming (> 15 W) UBA20271 Power IC for triac dimming (< 20 W) UBA20272 Power IC for triac dimming (< 20 W) Selection guide: Step dimming Product Description Mains Integrated NMOS power FET Boost Package UBA20260 Controller IC for step dimming (> 15 W) 120/230 V - Yes SO16 UBA20261 Power IC for step dimming (< 20 W) 120 V 2 x 350 V/1 Ω Yes SO20 UBA20262 Power IC for step dimming (< 20 W) 230 V 2 x 600 V/3 Ω Yes SO20 UBA20270 block diagram Typical system implementation, UBA20270 VDD 4 BOOTSTRAP SUPPLY DIVIDE BY 2 LOGIC REFERENCE VOLTAGES 14 FS 15 HBO LS driver TEMPERATURE SENSOR 160° 120° 80° 5 V DIGITAL 16 GHS HS driver LEVEL SHIFTER DRIVER LOGIC 2 GLS 1 SLS 5 V ANALOG D5 CAPACITIVE MODE DETECTOR STATE LOGIC CP 11 COUNTER Vph(SLS) R1 INDUCTOR SATURATION/ OVERCURRENT DETECTOR 60 μA C1 C2 D3 D4 C4 C5 C8 1.27 V BOOST ENABLE I 5 RREF CSI R10 FREQUENCY CONTROL VLD VCO LAMP CURRENT SENSOR START ENABLE C11 RCSI C14 D9 Vclamp (CSI) Votp(CSI) 14 8 15 4 UBA20270 7 R11 DCI C7 RSLS C6 5 2 6 1 CB CP CI CCB CCP C15 R8 C16 MDL RMDL RREF RREF CF CCF 9 10 3 13 PGND SGND 001aam672 Vth(bst) (DCI) OTA V R9 R7 R4 BOOST AMPLIFIER GLS SLS Vth(det)ign(CSI) LOGIC VDD Q2 L2 R3 11 C13 R2 3 PGND VOLTAGE CONTROLLED OSCILLATOR D8 D7 12 16 C12 HBO C9 CFL C10 Vth(ocp)SLS SGND 13 REFERENCE CURRENT GHS D2 IGNITION CURRENT DETECTOR LOGIC 6 μA D1 L1 25 μA 1 μA Q1 FS R6 LOGIC 5V R5 PREHEAT CURRENT SENSOR RESET STATE START-UP STATE PREHEAT STATE IGNITION STATE HOLD STATE BOOST STATE BURN STATE POWER-DOWN STATE LOGIC PREHEAT/ BOOST TIMER C3 Vth(capm)SLS RESET CB 12 D6 C17 VS LOW Vth(start) (DCI) 10 DCI VT(hec1) DCI DCI DSR 25 μA 6 8 9 7 CF CI CSI MDL LEVEL SHIFT DIMMER CONTROL 001aam663 www.nxp.com © 2012 NXP Semiconductors N.V. All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The Date of release: January 2012 information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and Document order number: 9397 750 17208 may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof Printed in the Netherlands does not convey nor imply any license under patent- or other industrial or intellectual property rights.