ZHCSD59F June 2012 – November 2017 LM34926
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 Control Overview
- 7.3.2 VCC Regulator
- 7.3.3 Regulation Comparator
- 7.3.4 Overvoltage Comparator
- 7.3.5 On-Time Generator
- 7.3.6 Current Limit
- 7.3.7 N-Channel Buck Switch and Driver
- 7.3.8 Synchronous Rectifier
- 7.3.9 Undervoltage Detector
- 7.3.10 Thermal Protection
- 7.3.11 Ripple Configuration
- 7.3.12 Soft Start
- 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 Custom Design With WEBENCH? Tools
- 8.2.2.2 Transformer Turns Ratio
- 8.2.2.3 Total IOUT
- 8.2.2.4 RFB1, RFB2
- 8.2.2.5 Frequency Selection
- 8.2.2.6 Transformer Selection
- 8.2.2.7 Primary Output Capacitor
- 8.2.2.8 Secondary Output Capacitor
- 8.2.2.9 Type III Feedback Ripple Circuit
- 8.2.2.10 Secondary Diode
- 8.2.2.11 VCC and Bootstrap Capacitor
- 8.2.2.12 Input Capacitor
- 8.2.2.13 UVLO Resistors
- 8.2.2.14 VCC Diode
- 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
封裝選項
機械數據 (封裝 | 引腳)
散熱焊盤機械數據 (封裝 | 引腳)
- DDA|8
訂購信息
8.2.2.4 RFB1, RFB2
The feedback resistors are selected to set the primary output voltage. The selected value for RFB1 is 1 kΩ. RFB2 can be calculated using the following equations to set VOUT1 to the specified value of 10 V. A standard resistor value of 7.32 kΩ is selected for RFB2.
Equation 7. 
Equation 8. 