Texas Instruments TPS92691, User Manual

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User's Guide
SLVUAL8 – December 2015
TPS92691 SEPIC LED Driver Evaluation Board
This user's guide describes the characteristics, operation, and use of the TPS92691 SEPIC Evaluation
Module (EVM). A complete schematic diagram, printed-circuit board layouts, and bill of materials are
included in this document.
Contents
1 Introduction
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3
2 Description
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3
2.1 Typical Applications
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3
2.2 Features
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3 Connector Description
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3.1 J1, VIN, GND
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4
3.2 J2, LED+, LED–
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4
3.3 TP1, SHUTDOWN
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4
3.4 TP2, SYNC
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4
3.5 TP3, PWM
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4
3.6 TP5, IADJ
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5
3.7 TP4, IMON
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5
4 Electrical Performance Specifications
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5 Schematic
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6 Performance Data and Typical Characteristic Curves
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6.1 Efficiency
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8
6.2 Line Regulation
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6.3 Load Regulation
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10
6.4 Temperature Characteristics
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6.5 Analog Adjust Settings
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6.6 PWM Dimming
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6.7 Typical Waveforms
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6.8 EMI
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7 Optimizing EVM Performance Based on LED String Voltage and Current
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8 TPS92691EVM-001 Assembly Drawing and PCB layout
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9 Bill of Materials
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List of Figures
1 Connection Diagram
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4
2 TPS92691EVM-001 Schematic: Configured With a High-Side Current Sense and a High-Side Series
PFET Device
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6
3 Alternate Configuration With a Low-Side Current Sense and a Low-Side Series NFET Device
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4 Efficiency vs Input Voltage (Number of series connected LEDs = 3)
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5 Efficiency vs. Input Voltage (Number of series connected LEDs = 7)
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6 Efficiency vs. Input Voltage (Number of Series-Connected LEDs = 13)
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7 Output LED Current vs Input Voltage (V
IADJ
= 140 mV)
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9
8 Output LED Current vs Input Voltage (V
IADJ
= 420 mV)
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9
9 Output LED Current vs Input Voltage (V
IADJ
= 700 mV)
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9
10 Output LED Current vs. LED String Configuration (V
IADJ
= 140 mV)
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10
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1 SLVUAL8 – December 2015 TPS92691 SEPIC LED Driver Evaluation Board
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