ZHCSA24H February 2013 – June 2017 LM5122
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 修訂歷史記錄
- 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 Undervoltage Lockout (UVLO)
- 7.3.2 High Voltage VCC Regulator
- 7.3.3 Oscillator
- 7.3.4 Slope Compensation
- 7.3.5 Error Amplifier
- 7.3.6 PWM Comparator
- 7.3.7 Soft-Start
- 7.3.8 HO and LO Drivers
- 7.3.9 Bypass Operation (VOUT = VIN)
- 7.3.10 Cycle-by-Cycle Current Limit
- 7.3.11 Clock Synchronization
- 7.3.12 Maximum Duty Cycle
- 7.3.13 Thermal Protection
- 7.4 Device Functional Modes
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8 Application and Implementation
- 8.1
Application Information
- 8.1.1 Feedback Compensation
- 8.1.2 Sub-Harmonic Oscillation
- 8.1.3 Interleaved Boost Configuration
- 8.1.4 DCR Sensing
- 8.1.5 Output Overvoltage Protection
- 8.1.6 SEPIC Converter Simplified Schematic
- 8.1.7 Non-Isolated Synchronous Flyback Converter Simplified Schematic
- 8.1.8 Negative to Positive Conversion
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Custom Design With WEBENCH® Tools
- 8.2.2.2 Timing Resistor RT
- 8.2.2.3 UVLO Divider RUV2, RUV1
- 8.2.2.4 Input Inductor LIN
- 8.2.2.5 Current Sense Resistor RS
- 8.2.2.6 Current Sense Filter RCSFP, RCSFN, CCS
- 8.2.2.7 Slope Compensation Resistor RSLOPE
- 8.2.2.8 Output Capacitor COUT
- 8.2.2.9 Input Capacitor CIN
- 8.2.2.10 VIN Filter RVIN, CVIN
- 8.2.2.11 Bootstrap Capacitor CBST and Boost Diode DBST
- 8.2.2.12 VCC Capacitor CVCC
- 8.2.2.13 Output Voltage Divider RFB1, RFB2
- 8.2.2.14 Soft-Start Capacitor CSS
- 8.2.2.15 Restart Capacitor CRES
- 8.2.2.16 Low-Side Power Switch QL
- 8.2.2.17 High-Side Power Switch QH and Additional Parallel Schottky Diode
- 8.2.2.18 Snubber Components
- 8.2.2.19 Loop Compensation Components CCOMP, RCOMP, CHF
- 8.2.3 Application Curves
- 8.1
Application Information
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機(jī)械、封裝和可訂購信息
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購信息
11 器件和文檔支持
11.1 器件支持
11.1.1 開發(fā)支持
11.1.1.1 使用 WEBENCH® 工具定制設(shè)計(jì)方案
請(qǐng)單擊此處，借助 WEBENCH® Power Designer 并使用 LM5122 器件創(chuàng)建定制設(shè)計(jì)方案。
- 在開始階段鍵入輸出電壓 (VIN)、輸出電壓 (VOUT) 和輸出電流 (IOUT) 要求。
- 使用優(yōu)化器撥盤優(yōu)化關(guān)鍵設(shè)計(jì)參數(shù)，如效率、封裝和成本。
- 將生成的設(shè)計(jì)與德州儀器 (TI) 的其他解決方案進(jìn)行比較。
WEBENCH Power Designer 提供一份定制原理圖以及羅列實(shí)時(shí)價(jià)格和組件可用性的物料清單。
在多數(shù)情況下，可執(zhí)行以下操作：
- 運(yùn)行電氣仿真，觀察重要波形以及電路性能
- 運(yùn)行熱性能仿真，了解電路板熱性能
- 將定制原理圖和布局方案導(dǎo)出至常用 CAD 格式
- 打印設(shè)計(jì)方案的 PDF 報(bào)告并與同事共享
有關(guān) WEBENCH 工具的詳細(xì)信息，請(qǐng)?jiān)L問 www.ti.com/WEBENCH。
11.2 接收文檔更新通知
要接收文檔更新通知，請(qǐng)導(dǎo)航至 ti.com 上的器件產(chǎn)品文件夾。請(qǐng)單擊右上角的通知我 進(jìn)行注冊(cè)，即可收到任意產(chǎn)品信息更改每周摘要。有關(guān)更改的詳細(xì)信息，請(qǐng)查看任意已修訂文檔中包含的修訂歷史記錄。
11.3 社區(qū)資源
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.
11.4 商標(biāo)
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.
11.5 靜電放電警告
這些裝置包含有限的內(nèi)置 ESD 保護(hù)。 存儲(chǔ)或裝卸時(shí)，應(yīng)將導(dǎo)線一起截短或?qū)⒀b置放置于導(dǎo)電泡棉中，以防止 MOS 門極遭受靜電損傷。
11.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.