Texas Instruments Buck-Boost PFC LED Driver Evaluation Module TPS92075EVM TPS92075EVM Datenbogen
Produktcode
TPS92075EVM
Introduction
14
TPS92075 Buck-Boost Bottom Copper (PCB is Single-Sided Copper)
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15
Suggested Dimming Connection
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List of Tables
1
TPS92075 Buck-Boost REF DESIGN-001 Electrical Performance Specifications
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2
System Scan of 27 Highest Peaks
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3
Dimmer Testing
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4
Bill of Materials
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1
Introduction
The TPS92075EVM is a 17-W maximum, 120-VAC non-isolated dimmable LED driver whose form factor
is intended for A-15, A-19, A-21, A-23, R-20, R-25, R-27, R-30, R-40, PS-25, PS-30, PS-35, BR-30, BR-
38, BR-40, PAR-20, PAR-30, PAR-30L, G-25, G-30, G-40, and other LED bulbs.
is intended for A-15, A-19, A-21, A-23, R-20, R-25, R-27, R-30, R-40, PS-25, PS-30, PS-35, BR-30, BR-
38, BR-40, PAR-20, PAR-30, PAR-30L, G-25, G-30, G-40, and other LED bulbs.
2
Description
The TPS92075EVM implements a dimming solution using the TPS92075 integrated circuit from Texas
Instruments. The TPS92075 is a hybrid power factor controller with a built-in phase dimming decoder. Line
cycles are analyzed continuously by an internal low power digital controller for shape and symmetry. An
analog current reference is then generated and used by the power converter stage to regulate the output
current. The analog reference is manipulated using control algorithms developed to optimize dimmer
compatibility, power factor, and THD.
Instruments. The TPS92075 is a hybrid power factor controller with a built-in phase dimming decoder. Line
cycles are analyzed continuously by an internal low power digital controller for shape and symmetry. An
analog current reference is then generated and used by the power converter stage to regulate the output
current. The analog reference is manipulated using control algorithms developed to optimize dimmer
compatibility, power factor, and THD.
Using constant off-time control, the solution achieves a low part count, high efficiency and inherently
provides variation in the switching frequency. This variation creates an emulated spread-spectrum effect
easing the converters EMI signature and allowing a smaller input filter.
provides variation in the switching frequency. This variation creates an emulated spread-spectrum effect
easing the converters EMI signature and allowing a smaller input filter.
2.1
Typical Applications
Triac-compatible LED lighting, including forward and reverse phase compatibility.
2.2
TPS92075 Features
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Controlled reference derived PFC (Power Factor Correction)
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Integrated digital phase angle decoder
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Digital PLL with active 50-Hz, 60-Hz sync
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Phase-symmetry balancing
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Instant-On with safe mode
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Leading and trailing edge dimmer compatibility
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Dimming implemented via an analog reference
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Smooth dimming transitions
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Over-voltage protection
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Output short circuit protection
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Low BOM cost and small PCB footprint
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Patent pending digital architecture
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6-pin SOT and 8-pin SOIC available
2
Using the TPS92075 Buck-Boost Converter
SLVU813A – November 2012 – Revised June 2013
Copyright © 2012–2013, Texas Instruments Incorporated