ZHCSEM9 December 2015 TPS92691 , TPS92691-Q1
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Internal Regulator and Undervoltage Lockout (UVLO)
- 7.3.2 Oscillator
- 7.3.3 Gate Driver
- 7.3.4 Rail-to-Rail Current Sense Amplifier
- 7.3.5 Transconductance Error Amplifier
- 7.3.6 Switch Current Sense and Internal Slope Compensation
- 7.3.7 Analog Adjust Input
- 7.3.8 PWM Input and Series Dimming FET Gate Driver Output
- 7.3.9 Soft-Start
- 7.3.10 Current Monitor Output
- 7.3.11 Overvoltage Protection
- 7.3.12 Thermal Protection
- 7.4 Device Functional Modes
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8 Application and Implementation
- 8.1
Application Information
- 8.1.1 Duty Cycle Considerations
- 8.1.2 Inductor Selection
- 8.1.3 Output Capacitor Selection
- 8.1.4 Input Capacitor Selection
- 8.1.5 Main Power MOSFET Selection
- 8.1.6 Rectifier Diode Selection
- 8.1.7 LED Current Programming
- 8.1.8 Switch Current Sense Resistor and Slope Compensation
- 8.1.9 Feedback Compensation
- 8.1.10 Soft-Start
- 8.1.11 Overvoltage Protection
- 8.1.12 PWM Dimming Considerations
- 8.2
Typical Applications
- 8.2.1
Typical Boost LED Driver
- 8.2.1.1 Design Requirements
- 8.2.1.2
Detailed Design Procedure
- 8.2.1.2.1 Calculating Duty Cycle
- 8.2.1.2.2 Setting Switching Frequency
- 8.2.1.2.3 Inductor Selection
- 8.2.1.2.4 Output Capacitor Selection
- 8.2.1.2.5 Input Capacitor Selection
- 8.2.1.2.6 Main N-Channel MOSFET Selection
- 8.2.1.2.7 Rectifying Diode Selection
- 8.2.1.2.8 Programming LED Current
- 8.2.1.2.9 Setting Switch Current Limit and Slope Compensation
- 8.2.1.2.10 Deriving Compensator Parameters
- 8.2.1.2.11 Setting Start-up Duration
- 8.2.1.2.12 Setting Overvoltage Protection Threshold
- 8.2.1.2.13 PWM Dimming Considerations
- 8.2.1.3 Application Curves
- 8.2.2
Typical Buck-Boost LED Driver
- 8.2.2.1 Design Requirements
- 8.2.2.2
Detailed Design Procedure
- 8.2.2.2.1 Calculating Duty Cycle
- 8.2.2.2.2 Setting Switching Frequency
- 8.2.2.2.3 Inductor Selection
- 8.2.2.2.4 Output Capacitor Selection
- 8.2.2.2.5 Input Capacitor Selection
- 8.2.2.2.6 Main N-Channel MOSFET Selection
- 8.2.2.2.7 Rectifier Diode Selection
- 8.2.2.2.8 Setting Switch Current Limit and Slope Compensation
- 8.2.2.2.9 Programming LED Current
- 8.2.2.2.10 Deriving Compensator Parameters
- 8.2.2.2.11 Setting Startup Duration
- 8.2.2.2.12 Setting Overvoltage Protection Threshold
- 8.2.2.2.13 PWM Dimming Consideration
- 8.2.2.3 Application Curves
- 8.2.1
Typical Boost LED Driver
- 8.1
Application Information
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文档支持
- 12机械、封装和可订购信息
11 器件和文档支持
11.1 相关链接
下面的表格列出了快速访问链接。范围包括技术文档、支持和社区资源、工具和软件，以及样片或购买的快速访问。
11.2 社区资源
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use.
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TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers.
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Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support.
11.3 商标
PowerPAD, E2E are trademarks of Texas Instruments.
All other trademarks are the property of their respective owners.
11.4 静电放电警告
这些装置包含有限的内置 ESD 保护。 存储或装卸时，应将导线一起截短或将装置放置于导电泡棉中，以防止 MOS 门极遭受静电损伤。
11.5 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.