LED Lighting Solutions

Transcription

1 TRIAC Dimmable Driver ICs Setting the Standard for Dimmer Compatibility

2 A19 The Flicker Effect Leading the Market Cirrus Logic has entered the emerging high-growth LED lighting market with a digital LED controller that directly solves dimmer compatibility issues that have been a major barrier to consumer adoption of LED retrofit bulbs. Featuring Cirrus Logic s new digital TruDim technology, the CS161X controller family has been tested to provide near 100 percent compatibility with a wide array of dimmers representing the vast majority of the installed base worldwide. LED retrofit bulbs are considered by many as the heir apparent to incandescent and compact fluorescent lamps due to their superior energy efficiency and long life. Key barriers to mass adoption have been higher cost and, like compact fluorescents, poor dimmer compatibility. None of the LED bulbs available today, which are primarily based on analog controllers, provide consumers broad compatibility with the wide variety of dimmers installed within residences, retailers and businesses. Dimmer incompatibly problems, which include bulbs that produce flickering or flashing light, or the inability to turn on or off, are a leading cause for high rate of return by consumers. Leading market research firms project that the LED lamp market in ambient lighting applications will grow from around 200 million units in 2011 to around one billion units by Thus, solving the issue of universal compatibility with dimmer systems on a global scale is one of the biggest challenges facing the lighting industry. The Universal Solution: Digital TruDim Technology The CS161X family enables industry-leading dimmer compatibility as a result of a three-year investment in TRIAC interface algorithms, LED driver topologies and system architecture, which are the foundation of TruDim technology. The CS161X s digital intelligence allows the controller to identify the type of dimmer in use and adapt the algorithm to provide smooth dimming in much the same way the consumer has come to expect from decades of using incandescent light bulbs. This smart adaptive digital signal processing technology is not possible with today s analog controllers. Copyright 2012 Cirrus Logic, Inc. All rights reserved. Printed in the USA. Cirrus Logic, Inc. and its subsidiaries ( Cirrus ) believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided 'as is' without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied upon is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, or for infringement of patents or other rights of third parties. This document is the property of Cirrus and, by furnishing this information, Cirrus grants no license, express or implied, under any patents, mask work rights, copyrights, trademarks, trade secrets, or other intellectual property rights. No part of this publication may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or otherwise) unless distributed in its entirety with all copyright notices attached. No part of this publication may be used as a basis for manufacture or sale of any items without the prior written consent of Cirrus. TM Certain applications using semiconductor products may involve potential risks of death, personal injury, or severe property or environmental damage ( critical applications ). Cirrus products are not designed, authorized, or warranted to be suitable for use in products surgically implanted into the body, automotive safety or security devices, life-support products or other critical applications. Inclusion of Cirrus products in such applications is understood to be fully at the customer s risk and Cirrus disclaims and makes no warranty of merchantability and fitness for particular purpose, with regard to any Cirrus product that is used in such a manner. If the customer uses or permits the use of Cirrus products in critical applications, customer agrees, by such use, to fully indemnify Cirrus, its officers, directors, employees, distributors and other agents from any and all liability, including attorneys fees and costs, that may result from or arise in connection with these uses. Cirrus Logic, Cirrus, the Cirrus Logic logo designs, EXL Core, the EXL Core logo design, TruDim, and the TruDim logo design are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks or service marks of their respective owners. ii For more information, visit 1

3 CS161X Family of TRIAC Dimmable Driver ICs The CS161X is the first family of products in Cirrus Logic s new line of LED controller solutions designed to help leading LED lamp manufacturers solve complex engineering challenges and drive high-volume LED sales growth. The CS161X family s unique adaptive dimmer compatibility algorithm controls the boost stage to enable best-in-class flicker-free phase dimming across the light spectrum, including deep dimming down to zero percent of light output with leading edge, trailing edge and digital dimmers. The CS161X family integrates a variable conduction mode boost converter (CRM/CCM), providing power factor correction and dimmer compatibility with primary-side control, constant output current and quasi-resonant flyback or buck output stage, and includes solutions for both VAC and VAC line voltages. Cirrus Logic s family of TRIAC dimmable LED drivers set a new standard for lighting through the combination of three critical features: The highest TRIAC dimmer compatibility in the industry High efficiency Flicker-free dimming CS161X The CS1610/11/12/13 digital control ICs are engineered to deliver a high-efficiency, cost effective, flicker-free, phase-dimmable, solid state lighting (SSL) solution for the incandescent lamp replacement market. The CS1610/11 is designed to control a quasi-resonant flyback topology while the CS1612/13 is designed to control a buck topology. The CS1610/11/12/13 integrate a critical conduction mode (CRM) boost converter that provides power factor correction and dimmer compatibility with a constant output current, quasi-resonant second stage. An adaptive dimmer compatibility algorithm controls the boost stage and dimmer compatibility operation mode to enable flicker-free operation to 0% output current with leading-edge, trailing-edge and digital dimmers (dimmers with an integrated power supply). Features: Best-in-class dimmer compatibility Leading-edge (TRIAC) dimmers Trailing-edge dimmers Digital dimmers (with integrated power supply) Up to 90% efficiency Flicker-free dimming 0% minimum dimming level Temperature compensated LED current Quasi-resonant second stage with constant current output Flyback and buck Fast startup Tight LED current regulation: better than ±5% Primary side regulation (PSR) >0.9 power factor IEC compliant NEMA C82.77 compliant ENERGY STAR compliant Soft start Protections open/short Current sense resistor open/short External over temperature using NTC TRIAC Dimmer Compatibility AC Mains The CS1610/11/12/13 driver ICs offer up to 90% efficiency and the highest TRIAC dimmer compatibility in the industry. 2 For more information, visit 3

4 Cirrus Logic s EXL Core is a unique digital approach to developing green energy products. It represents more than 80 patents in signal processing innovation via complex algorithms along with analog peripherals. Product Selector Table Typical Flyback Schematic Part TRIAC Dimmable Stage Topology Range Maximum Power LED Channels Power Factor Current Reg. Min. Dimming Level External Over Temp Protect Package CS1610 Flyback; Buck-boost VAC < 25 W 1 > 0.9 < 5% 0% 16eSOIC CS1611 Flyback; Buck-boost VAC < 25 W 1 > 0.9 < 5% 0% 16eSOIC CS1612 Buck; Tapped-buck VAC < 25 W 1 > 0.9 < 5% 0% 16eSOIC CS1613 Buck and Tapped-buck VAC < 25 W 1 > 0.9 < 5% 0% 16eSOIC Stage Topology Range Flyback Buck-boost Buck Tapped-buck Typical Buck Schematic VAC CS1610 CS VAC CS1611 CS1613 Reference Designs Part Nominal Rated Power Stage Topology Current Efficiency CRD W 230 VAC 8.0 W Flyback 11.0 V V 550 ma 83% CRD W 120 VAC 8.1 W Flyback 14.0 V V 470 ma 84% 4 For more information, visit 5

5 Proven Performance: CRD1611-8W Typical Performance Near 100 Percent Tested Dimmer Compatibility Cirrus Logic acquired more than 200 dimmers from all over the world and developed a compatibility test to measure the performance of existing solutions against the CS161X products. Tests were performed on 120 V and 230 V products, in single and multi-lamp configurations of five and ten lamps in parallel, and a final test score was derived based upon five key parameters: (1) functionality (2) flicker-free steady state (3) flicker-free transient (4) smooth dimming, and (5) dimming range (max-minimum). Cirrus Logic s CS161X family performed near flawlessly across the test s metrics, achieving 99 compatibility. The closest competitive LED controller performed at 73, and the average among today s current LED controllers was 50. Power (W) Efficiency (%) Dim Angle ( ) Current (A) Current (A) Line (V) Dimmer Compatibility Comparison Vin (VAC) Dim Angle ( ) 80 Compatibility Percentage (%) Power Factor Cirrus Logic Company A Company B Company C Company D Vin (VAC) Comparison based on 230 VAC input LED retrofit lamps 6 For more information, visit 7

6 Reference Designs CRD1611-8W The CRD W reference design demonstrates the performance of the CS1611 resonant mode AC/ DC dimmable LED driver IC with a 550 ma output driving 4 LEDs in series. It offers best-in-class dimmer compatibility with leading edge, trailing edge, and digital dimmers. The form factor is targeted to fit into many LED bulb applications (A19, PAR). Dimensions: Length x Width x Height = 58.0 mm x 30.0 mm x 18.0 mm CRD1610-8W The CRD W reference design demonstrates the performance of the CS1610 resonant mode AC/DC dimmable LED driver IC with a 470 ma output driving 5 X LEDs in series. It offers best-in-class dimmer compatibility with leading edge, trailing edge and digital dimmers. The form factor is targeted to fit into many LED bulb applications (A19, PAR). Features: Quasi-resonant flyback with constant current output Flicker-free dimming Line voltage 230 VAC, ±10% Rated input power: 8 W Rated output power: 6.6 W Efficiency: 83% at 550 ma, for 4 X LEDs in series Low component count Supports Cirrus Logic product CS1611 Dimensions: Length x Width x Height = 58.0 mm x 30.0 mm x 18.0 mm Features: 8 For more information, visit Quasi-resonant flyback with constant current output Flicker-free dimming Line voltage 120 VAC, ±10% Rated input power: 8.1 W Rated output power: 6.7 W Efficiency: 84% at 470 ma, for 5 X LEDs in series Low component count Supports Cirrus Logic product CS1610 9

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