ZHCSD65B SEPTEMBER 2013 – December 2014 LM5121 , LM5121-Q1
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 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 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 Disconnection Switch Control
- 7.3.8 Soft-Start
- 7.3.9 HO and LO Drivers
- 7.3.10 Bypass Operation (VOUT = VIN)
- 7.3.11 Cycle-by-Cycle Current Limit
- 7.3.12 Circuit Breaker Function
- 7.3.13 Clock Synchronization
- 7.3.14 Maximum Duty Cycle
- 7.3.15 Thermal Protection
- 7.4 Device Functional Modes
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Timing Resistor RT
- 8.2.2.2 UVLO Divider RUV2, RUV1
- 8.2.2.3 Input Inductor LIN
- 8.2.2.4 Current Sense Resistor RS
- 8.2.2.5 Current Sense Filter RCSFP, RCSFN, CCS
- 8.2.2.6 Slope Compensation Resistor RSLOPE
- 8.2.2.7 Output Capacitor COUT
- 8.2.2.8 Input Capacitor CIN
- 8.2.2.9 VIN Filter RVIN, CVIN
- 8.2.2.10 Bootstrap Capacitor CBST and Boost Diode DBST
- 8.2.2.11 VCC Capacitor CVCC
- 8.2.2.12 Output Voltage Divider RFB1, RFB2
- 8.2.2.13 Soft-Start Capacitor CSS
- 8.2.2.14 Restart Capacitor CRES
- 8.2.2.15 Low-Side Power Switch QL
- 8.2.2.16 High-Side Power Switch QH and Additional Parallel Schottky Diode
- 8.2.2.17 Snubber Components
- 8.2.2.18 Disconnect Switch QD Selection
- 8.2.2.19 Freewheeling Diode DF Selection
- 8.2.2.20 Loop Compensation Components CCOMP, RCOMP, CHF
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械封裝和可訂購信息
11 器件和文檔支持
11.1 相關鏈接
以下表格列出了快速訪問鏈接。 范圍包括技術文檔、支持與社區資源、工具和軟件，并且可以快速訪問樣片或購買鏈接。
11.2 商標
All other trademarks are the property of their respective owners.
11.3 靜電放電警告
這些裝置包含有限的內置 ESD 保護。 存儲或裝卸時，應將導線一起截短或將裝置放置于導電泡棉中，以防止 MOS 門極遭受靜電損傷。