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TPS92691EVM-001 产品设计参考手册 - TI（德州仪器）
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PLC可编程逻辑控制器
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TEXAS INSTRUMENTS TPS92691EVM-001 评估电路板, TPS92691, 发光二极管驱动器
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TPS92691EVM-001数据手册
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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 ................................................................................................................... 3
2 Description.................................................................................................................... 3
2.1 Typical Applications ................................................................................................ 3
2.2 Features.............................................................................................................. 3
3 Connector Description....................................................................................................... 4
3.1 J1, VIN, GND........................................................................................................ 4
3.2 J2, LED+, LED–..................................................................................................... 4
3.3 TP1, SHUTDOWN.................................................................................................. 4
3.4 TP2, SYNC .......................................................................................................... 4
3.5 TP3, PWM ........................................................................................................... 4
3.6 TP5, IADJ............................................................................................................ 5
3.7 TP4, IMON........................................................................................................... 5
4 Electrical Performance Specifications..................................................................................... 5
5 Schematic..................................................................................................................... 6
6 Performance Data and Typical Characteristic Curves.................................................................. 8
6.1 Efficiency............................................................................................................. 8
6.2 Line Regulation ..................................................................................................... 9
6.3 Load Regulation................................................................................................... 10
6.4 Temperature Characteristics..................................................................................... 11
6.5 Analog Adjust Settings............................................................................................ 12
6.6 PWM Dimming..................................................................................................... 13
6.7 Typical Waveforms................................................................................................ 14
6.8 EMI ................................................................................................................. 16
7 Optimizing EVM Performance Based on LED String Voltage and Current......................................... 17
8 TPS92691EVM-001 Assembly Drawing and PCB layout............................................................. 17
9 Bill of Materials ............................................................................................................. 19
List of Figures
1 Connection Diagram......................................................................................................... 4
2 TPS92691EVM-001 Schematic: Configured With a High-Side Current Sense and a High-Side Series
PFET Device ................................................................................................................. 6
3 Alternate Configuration With a Low-Side Current Sense and a Low-Side Series NFET Device.................. 7
4 Efficiency vs Input Voltage (Number of series connected LEDs = 3)................................................. 8
5 Efficiency vs. Input Voltage (Number of series connected LEDs = 7) ................................................ 8
6 Efficiency vs. Input Voltage (Number of Series-Connected LEDs = 13) ............................................. 8
7 Output LED Current vs Input Voltage (V
IADJ
= 140 mV) ................................................................ 9
8 Output LED Current vs Input Voltage (V
IADJ
= 420 mV) ................................................................ 9
9 Output LED Current vs Input Voltage (V
IADJ
= 700 mV) ................................................................ 9
10 Output LED Current vs. LED String Configuration (V
IADJ
= 140 mV)................................................. 10
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SLVUAL8–December 2015 TPS92691 SEPIC LED Driver Evaluation Board
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