This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
An IMPORTANT NOTICE at the end of this TI reference design addresses authorized use, intellectual property matters and other important disclaimers and information.
200W PFC + LCC resonant converter reference design for LED lighting
Description
This reference design uses the UCC28180 CCM PFC controller and the UCC256301 Wide Vin resonant controller as an LCC controller with an integrated driver. It provides up to 200W constant current or constant voltage output from a universal AC input. An external analog dimming voltage signal can be applied to dynamically adjust output current for dimming LED loads.
200W PFC + LCC resonant converter reference design for LED lighting
2 Efficiency, Power Factor, and Harmonics The efficiency curves are shown in the tables and graph below. A 12V fan (NMB Technologies Model # 3610VL-04W-B50-B00) was applied to the board during testing directed toward inductor L200. The following image depicts this setup.
200W PFC + LCC resonant converter reference design for LED lighting
2.1 Isolated DC-DC stage (LLC-SRC) efficiency – constant output voltage L100 and J200 are opened during the test. DC input is provided at C206 along with 115VAC input for high voltage startup.
60%
65%
70%
75%
80%
85%
90%
95%
0.00 50.00 100.00 150.00 200.00
Effi
cie
ncy
Output Power (W)
LCC Efficiency
400Vin
435Vin
460Vin
200W PFC + LCC resonant converter reference design for LED lighting
2.2 Isolated DC-DC stage (LLC-SRC) efficiency – constant output current L100 and J200 are opened during the test. DC input is provided at C206 along with 115VAC input for high voltage startup. LED load used (MP22T1-C24-5070-T2-1-00), up to 4 in series.
3 Dimming Dimming test is performed with J202 pin2 to 3 shorted and 0-10V analog dimming signal externally. LED load used (MP22T1-C24-5070-T2-1-00), 4 in series.
Vdim (V) Vin,rms (V) Iin,rms (A) Pin (W) P.F. THD Vout (V) Iout (A) Pout (W) Eff (%)
4 Thermal Images The thermal images below show a top view and bottom view of the board. The board is placed vertically during the test. The ambient temperature was 25ºC with 12V fan applied for airflow. The output was loaded with 200V/1A.
4.1 120VAC/60Hz, Top Side
Designator Part
Designator Value
Sp1 L200 44.8°C
Sp2 T200 56.4°C
Sp3 RT100 103.7°C
Sp4 D104 57.5°C
200W PFC + LCC resonant converter reference design for LED lighting
5 Output Ripple Voltages Ripple voltages are shown in the images below, where Channel 1 is the output voltage in AC level and Channel 4 is output current.
5.1 120VAC/60Hz –200V/0A
200W PFC + LCC resonant converter reference design for LED lighting
7 Frequency Response Frequency response (voltage loop) of the LLC-SRC stage is tested with 430VDC input at C206 and 200V/1A output. An injection signal is applied to R232.
200W PFC + LCC resonant converter reference design for LED lighting
8.1 120VAC-60Hz,200V /1A output. C1: switch node waveform at LO, C2: output voltage
200W PFC + LCC resonant converter reference design for LED lighting
IMPORTANT NOTICE AND DISCLAIMERTI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCEDESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS”AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANYIMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRDPARTY INTELLECTUAL PROPERTY RIGHTS.These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriateTI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicablestandards, and any other safety, security, or other requirements. These resources are subject to change without notice. TI grants youpermission to use these resources only for development of an application that uses the TI products described in the resource. Otherreproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third partyintellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims, damages,costs, losses, and liabilities arising out of your use of these resources.TI’s products are provided subject to TI’s Terms of Sale (https:www.ti.com/legal/termsofsale.html) or other applicable terms available eitheron ti.com or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’sapplicable warranties or warranty disclaimers for TI products.IMPORTANT NOTICE