PMP605 TPS9075 0Vac TRIAC Dimmable LED Driver Reference Design March, 04
0Vac TRIAC Dimmable LED Driver Reference Design Introduction This TPS9075 reference design presents the TPS9075 controller driving a 54V string of LEDs at 85mA in a buck-boost configuration. It is a TRIAC dimmable reference design. An additional circuit is introduced to improve the maximum LED current at maximum dimmer angle (max at max). Results are shown with and without the circuit for comparison. Description This reference design provides a high-brightness LED driver based on the TPS9075. It is designed to operate with an input voltage in the range of 90VAC to VAC with a 0 VAC nominal input voltage. This design is set up for an 85mA output current with an output voltage range of 46 V to 54 V. The Max at Max circuit uses simple low cost components to adjust the converter off-time and the output current. A small capacitance transfers a small amount of energy when the triac edge is present, filters it and creates a small current which adds to the existing off-time charge current from VCC. The effect is a shortened off time and increased output current, only when a triac is present.. Typical Applications This converter design describes an application of the TPS9075 as an LED driver with the specifications listed below. For applications with a different output voltage or current range refer to the TPS9075 datasheet. Typical applications include a wide variety of LED bulb form factors including: A-5, A-9, A-, A-, R-0, R-5, R-7, R-0, R-40, PS-5, PS-0, PS-5, BR-0, BR-8, BR-40, PAR-0, PAR-0, PAR-0L, G-5, G-0, G-40, and other LED bulbs.. Connectors.. Connector Description This section describes the connectors of the reference design board without max at max.... J8 This connector is for the AC input to the board. Use the screw down terminal to connect Line and Neutral to the circuit.... J6 This connector is for the LED load.
Electrical Performance Specifications Table : TPS9075 0Vac TRIAC Dimmable Buck-Boost Electrical Performance Specifications PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Input Characteristics Voltage range Normal operation 90 0 VAC Maximum input current At 0VAC 60Hz input voltage 0.5 A Output Characteristics Output voltage, VOUT 46 54 V Output load current, IOUT Input voltage = 0V 60Hz, Load = 54V LED 85 ma Output current line regulation Input voltage 08V to V 60Hz, Load = 54V LED < ±7 % Systems Characteristics Switching frequency Input voltage = 0V 60Hz, Load = 54V LED 00 khz Power Factor Input voltage = 0V 60Hz, Load = 54V LED 0.97 Efficiency Input voltage = 0V 60Hz, Load = 54V LED 86 % Table : TPS9075 0Vac TRIAC Dimmable Buck-Boost with Max at Max Electrical Performance Specifications PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Input Characteristics Voltage range Normal operation 90 0 VAC Maximum input current At 0VAC 60Hz input voltage 0.5 A Output Characteristics Output voltage, VOUT 45 54 V Output load current, IOUT Input voltage = 0V 60Hz, Load = 5V LED 65 ma Output current line regulation Input voltage 08V to V 60Hz, Load = 5V LED < ±6 % Systems Characteristics Switching frequency Input voltage = 0V 60Hz, Load = 5V LED 00 khz Power Factor Input voltage = 0V 60Hz, Load = 5V LED 0.97 Efficiency Input voltage = 0V 60Hz, Load = 5V LED 86 %
4 - + 4 - + 4 Schematic L L LED- L F MS 500 500mA ~ ~ BR HD04-T 400V 4 744770 00uH 744770 00uH C 0.0µF 50V C 0.47µF 50V R 0 R k D 5V MMSZ470TG Q AOUN60 600V D8 DFLS00-7 R9.00Meg C6 0.µF 50V B59C04K C 0uF 6V LED+ N R4 0 D4 5V MMSZ470TG L4 TSL5RA-68KR99-PF 680µH D 400V STTHR04U U BZT5C4V7--F C5 µf 5V R5 4k C8 0pF 50V COFF VCC GND COFF VCC 4 GATE TPS9075D D5A BAW56-V-GS08 ASNS NC NC ISNS R0 6.04k C0 0.0µF 5V 8 ASNS 7 6 5 ISNS D5B BAW56-V-GS08 R 00k D 4.7V C7 4700pF R.00k R6 4.99 R7.7 R8.8 Q FDD6N5TM 50V Figure : TPS9075 0Vac TRIAC Dimmable 0W LED Driver Schematic L N F MS 500 500mA C 470pF Rect AC_F R 49.9k ~ ~ D4 BAVS-7-F BR HD04-T 400V 4 C5 0.u 'Max at Max' Circuit L 744770 00uH R6 49k Rect AC_F L 744770 00uH C 0.0µF 50V C5 µf 5V C 0.47µF 50V R 0 R5 4k C8 0pF 50V COFF VCC 4 R4 0 R k U D 5V MMSZ470TG GND COFF VCC GATE D5A TPS9075D BAW56-V-GS08 ASNS R0 6.04k D8 DFLS00-7 NC NC ISNS Q AOUN60 600V C0 0.0µF 5V 8 ASNS 7 6 5 ISNS D5B BAW56-V-GS08 R9.00Meg R 86.6k D4 5V MMSZ470TG BZT5C4V7--F C6 0.µF 50V B59C04K D 4.7V C7 4700pF R.00k C 0uF 6V L4 TSL5RA-68KR99-PF 680µH R6 4.99 R7.7 LED- LED+ R8.8 D 400V STTHR04U Q FDD6N5TM 50V Figure : TPS9075 0Vac TRIAC Dimmable 8W LED Driver with max at max Schematic 4
Efficiency (%) Efficiency (%) 5 Performance Data and Typical Characteristic Curves Figures through 8 present typical performance curves for TPS9075 0Vac TRAIC Dimmable LED Driver with (8W) and without (0W) max at max. 5. Efficiency Efficiency vs. Input Voltage 90.00 89.00 88.00 87.00 86.00 85.00 84.00 8.00 8.00 54V LED stack w/o max at max 8.00 5V LED stack w/ max at max 80.00 05 0 5 0 5 0 5 Input Voltage (Vac) Figure : Efficiency Efficiency vs. LED Stack 90.00 89.00 88.00 87.00 86.00 85.00 84.00 8.00 8.00 w/o max at max 8.00 w/ max at max 80.00 45.00 47.00 49.00 5.00 5.00 55.00 LED Stack (Vdc) Figure 4: Efficiency at 0Vac 60Hz input 5
Power Factor LED Current (A) 5. Current Regulation 0.0 LED Current vs. LED Stack 0.0 0.00 0.90 0.80 0.70 0.60 w/o max at max 0.50 w/ max at max 0.40 45.00 47.00 49.00 5.00 5.00 55.00 LED Stack (Vdc) Figure 5: LED Current vs. LED stack voltage 0Vac 60Hz input 5. Power Factor Power Factor vs. Input Voltage.00 0.99 0.98 0.97 0.96 0.95 0.94 0.9 0.9 w/o max at max 0.9 w/ max at max 0.90 05 0 5 0 5 0 5 Input Voltage (Vac) Figure 6: Power Factor 0Vac 60Hz 6
LED Current (A) 5.4 Dimmer max at max performance LED Current vs. w&w/o Max at Max 0.8 0.6 0.4 0. 0. 0.08 0.06 0.04 0.0 0 w/o Max at Max w/ Max at Max Dimmer 0.9 0. Dimmer 0.7 0.50 Dimmer 0.4 0.5 5.5 EMI Performance Figure 7: 0Vac 60Hz with 5V LED stack at 6mA. An average increase of 5mA. Figure 8: 0VAC Average EMI Scan Yellow Trace: PEAK Blue Trace: Average 7
6 TPS9075 0Vac TRIAC Dimmable LED Driver without max at max PCB layout The following figures (Figure 4 through Figure 5) show the design of the printed circuit board. Figure 9: Top Overlay view Figure 0: Bottom Layer (PCB is Single-Sided Copper) 8
Bill of Materials Designator Quantity Description Manufacturer Part Number BR Diode, Sw itching-bridge, 400V, 0.8A, MiniDIP Diodes Inc. HD04-T C CAP FILM 0.0UF 50VDC RADIAL EPCOS Inc B59CJ C CAP FILM 0.47UF 50VDC RADIAL EPCOS Inc B5C474K C CAP ALUM 80UF 6V 0% RADIAL Panasonic EEU-FRJ8B C5 CAP CER UF 5V 0% X7R 0 Taiyo Yuden TMK5B76MM-TR C6 CAP FILM 0.UF 50VDC RADIAL EPCOS Inc B59C04K C7 CAP, CERM, 4700pF, 50V, +/-0%, X7R, 060 MuRata GRM88R7H47KA0D C8 CAP, CERM, 0pF, 50V, 5%,NP0, 060 MuRata GRM885CHJA0D C0 CAP CER 0.0UF 5V 0% X7R 060 TDK Corporation C608X7REM D, D4 Diode, Zener, 5V, 500mW, SOD- ON Semiconductor MMSZ470TG D DIODE ULT FAST 400V A SMB STMicroelectronics STTHR04U D DIODE ZENER 4.7V 500MW SOD- Diodes Inc BZT5C4V7--F D5 BAW56-V-GS08CT-ND Vishay Semiconductors BAW56-V-GS08 D8 Diode, Schottky, 00V, A, Pow erdi Diodes Inc. DFLS00-7 F FUSE 500MA 5V SLOW AXL BULK MS Bel Fuse Inc MS 500 L, L INDUCTOR 00UH.6A 8075 RAD Wurth Electronics Inc 744770 L4 INDUCTOR 680UH.99A RADIAL TDK Corporation TSL5RA-68KR99-PF Q MOSFET N-CH 50V 4.4A DPAK Fairchild FDD6N5TM Q MOSFET N-CH 600V.5A IPAK Alpha & Omega Semi AOUN60 R RES 0 OHM W 5% 5 SMD Vishay Dale CRCW50RJNEG R RES, 00k ohm, %, 0.W, 060 Vishay-Dale CRCW06000KFKEA R RES, k ohm, %, 0.5W, 06 Vishay-Dale CRCW06KFKEA R4 RES 0.0 OHM /4W % AXIAL Vishay Dale CMF500R000FHEB R5 RES, 4k ohm, %, 0.5W, 0805 Vishay-Dale CRCW08054KFKEA R6 RES, 4.99 ohm, %, 0.W, 060 Vishay-Dale CRCW0604R99FKEA R7 RES 4.7 OHM /8W % 0805 SMD Vishay Dale CRCW08054R70FKEA R8 RES.8 OHM /8W % 0805 SMD Vishay Dale CRCW0805R80FKEA R9 RES,.00Meg ohm, %, 0.5W, 06 Vishay-Dale CRCW06M00FKEA R0 RES, 6.04k ohm, %, 0.W, 060 Vishay-Dale CRCW0606K04FKEA R RES,.00k ohm, %, 0.5W, 0805 Vishay-Dale CRCW0805K00FKEA U Non-isolated Phase Dimmable Buck PFC LED Driver Texas Instruments TPS9075D Additional components for max at max circuit C CER 470PF 50V 5% NP0 060 TDK Corporation C608C0GE47J080AA R RES 49.9K OHM /0W % 060 SMD Vishay-Dale CRCW06049K9FKEA D4 DIODE ARRAY 00V 400MA SOT Diodes Inc BAVS-7-F C5 0.uF, 5V, Ceramic TDK Corporation C608X7RE04K080AA R6 RES 49K OHM /0W % 060 SMD Vishay-Dale CRCW06049KFKEA 9
EVALUATION BOARD/KIT/MODULE (REF DESIGN) WARNINGS, RESTRICTIONS AND DISCLAIMER For Feasibility Evaluation Only, in Laboratory/Development Environments. The REF DESIGN is not a complete product. It is intended solely for use for preliminary feasibility evaluation in laboratory / development environments by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical / mechanical components, systems and subsystems. It should not be used as all or part of a production unit. Your Sole Responsibility and Risk. You acknowledge, represent and agree that:. You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees, affiliates, contractors or designees) of the REF DESIGN for evaluation, testing and other purposes.. You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates, contractors or designees, using the REF DESIGN. Further, you are responsible to assure that any interfaces (electronic and/or mechanical) between the REF DESIGN and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard.. Since the REF DESIGN is not a completed product, it may not meet all applicable regulatory and safety compliance standards (such as UL, CSA, VDE, CE, RoHS and WEEE) which may normally be associated with similar items. You assume full responsibility to determine and/or assure compliance with any such standards and related certifications as may be applicable. You will employ reasonable safeguards to ensure that your use of the REF DESIGN will not result in any property damage, injury or death, even if the REF DESIGN should fail to perform as described or expected. Certain Instructions. Exceeding the specified REF DESIGN ratings (including but not limited to input and output voltage, current, power, and environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the REF DESIGN and/or interface electronics. Please consult the REF DESIGN User s Guide prior to connecting any load to the REF DESIGN output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 60 C as long as the input and output ranges are maintained at nominal ambient operating temperature. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be indentified using the REF DESIGN schematic located in the REF DESIGN User s Guide. When placing measurement probes near these devices during normal operation, please be aware that these devices may be very warm to the touch. Agreement to Defend, Indemnify and Hold Harmless. You agree to defend, indemnify and hold TI, its licensors and their representatives harmless from and against any and all claims, damages, losses, expenses, costs and liabilities (collectively, Claims ) arising out of or in connection with any use of the REF DESIGN that is not in accordance with the terms of this agreement. This obligation shall apply whether Claims arise under the law of tort or contract or any other legal theory, and even if the REF DESIGN fails to perform as described or expected. Safety-Critical or Life-Critical Applications. If you intend to evaluate TI components for possible use in safety-critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, such as devices which are classified as FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement.
IMPORTANT NOTICE FOR TI REFERENCE DESIGNS Texas Instruments Incorporated ("TI") reference designs are solely intended to assist designers ( Buyers ) who are developing systems that incorporate TI semiconductor products (also referred to herein as components ). Buyer understands and agrees that Buyer remains responsible for using its independent analysis, evaluation and judgment in designing Buyer s systems and products. TI reference designs have been created using standard laboratory conditions and engineering practices. TI has not conducted any testing other than that specifically described in the published documentation for a particular reference design. TI may make corrections, enhancements, improvements and other changes to its reference designs. Buyers are authorized to use TI reference designs with the TI component(s) identified in each particular reference design and to modify the reference design in the development of their end products. HOWEVER, NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT, AND NO LICENSE TO ANY THIRD PARTY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT, IS GRANTED HEREIN, including but not limited to any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information published by TI regarding third-party products or services does not constitute a license to use such products or services, or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. TI REFERENCE DESIGNS ARE PROVIDED "AS IS". TI MAKES NO WARRANTIES OR REPRESENTATIONS WITH REGARD TO THE REFERENCE DESIGNS OR USE OF THE REFERENCE DESIGNS, EXPRESS, IMPLIED OR STATUTORY, INCLUDING ACCURACY OR COMPLETENESS. TI DISCLAIMS ANY WARRANTY OF TITLE AND ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT, QUIET POSSESSION, AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL PROPERTY RIGHTS WITH REGARD TO TI REFERENCE DESIGNS OR USE THEREOF. TI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY BUYERS AGAINST ANY THIRD PARTY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON A COMBINATION OF COMPONENTS PROVIDED IN A TI REFERENCE DESIGN. IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL, SPECIAL, INCIDENTAL, CONSEQUENTIAL OR INDIRECT DAMAGES, HOWEVER CAUSED, ON ANY THEORY OF LIABILITY AND WHETHER OR NOT TI HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, ARISING IN ANY WAY OUT OF TI REFERENCE DESIGNS OR BUYER S USE OF TI REFERENCE DESIGNS. TI reserves the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products are sold subject to TI s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI s terms and conditions of sale of semiconductor products. Testing and other quality control techniques for TI components are used to the extent TI deems necessary to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. TI assumes no liability for applications assistance or the design of Buyers products. Buyers are responsible for their products and applications using TI components. To minimize the risks associated with Buyers products and applications, Buyers should provide adequate design and operating safeguards. Reproduction of significant portions of TI information in TI data books, data sheets or reference designs is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards that anticipate dangerous failures, monitor failures and their consequences, lessen the likelihood of dangerous failures and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use of any TI components in Buyer s safety-critical applications. In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI s goal is to help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and requirements. Nonetheless, such components are subject to these terms. No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties have executed an agreement specifically governing such use. Only those TI components that TI has specifically designated as military grade or enhanced plastic are designed and intended for use in military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components that have not been so designated is solely at Buyer's risk, and Buyer is solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI has specifically designated certain components as meeting ISO/TS6949 requirements, mainly for automotive use. In any case of use of non-designated products, TI will not be responsible for any failure to meet ISO/TS6949. Mailing Address: Texas Instruments, Post Office Box 6550, Dallas, Texas 7565 Copyright 0, Texas Instruments Incorporated