ZHCS579F April 2011 – August 2015 LM5117 , LM5117-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
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7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 High Voltage Start-up Regulator and VCC Disable
- 7.3.2 UVLO
- 7.3.3 Oscillator and Sync Capability
- 7.3.4 Ramp Generator and Emulated Current Sense
- 7.3.5 Error Amplifier and PWM Comparator
- 7.3.6 Soft-Start
- 7.3.7 Cycle-by-Cycle Current Limit
- 7.3.8 Hiccup Mode Current Limiting
- 7.3.9 HO and LO Drivers
- 7.3.10 Current Monitor
- 7.3.11 Maximum Duty Cycle
- 7.3.12 Thermal Protection
- 7.4 Device Functional Modes
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8 Application and Implementation
- 8.1 Application Information
- 8.2 Typical Applications
- 8.3
Detailed Design Procedure
- 8.3.1 Feedback Compensation
- 8.3.2 Sub-Harmonic Oscillation
- 8.3.3 Design Requirements
- 8.3.4 Timing Resistor RT
- 8.3.5 Output Inductor LO
- 8.3.6 Diode Emulation Function
- 8.3.7 Current Sense Resistor RS
- 8.3.8 Current Sense Filter RCS and CCS
- 8.3.9 Ramp Resistor RRAMP and Ramp Capacitor CRAMP
- 8.3.10 UVLO Divider RUV2, RUV1 and CFT
- 8.3.11 VCC Disable and External VCC Supply
- 8.3.12 Power Switches QH and QL
- 8.3.13 Snubber Components RSNB and CSNB
- 8.3.14 Bootstrap Capacitor CHB and Bootstrap Diode DHB
- 8.3.15 VCC Capacitor CVCC
- 8.3.16 Output Capacitor CO
- 8.3.17 Input Capacitor CIN
- 8.3.18 VIN Filter RVIN, CVIN
- 8.3.19 Soft-Start Capacitor CSS
- 8.3.20 Restart Capacitor CRES
- 8.3.21 Output Voltage Divider RFB2 and RFB1
- 8.3.22 Loop Compensation Components CCOMP, RCOMP and CHF
- 8.4 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文档支持
- 12机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息
11 器件和文档支持
11.1 相关链接
以下表格列出了快速访问链接。 范围包括技术文档、支持与社区资源、工具和软件，并且可以快速访问样片或购买链接。
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
E2E is a trademark of Texas Instruments.
WEBENCH is a registered trademark 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.