ZHCSHC6I January 2007 – December 2017 LM5022
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
-
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 Switching Frequency
- 8.2.2.2 MOSFET
- 8.2.2.3 Output Diode
- 8.2.2.4 Boost Inductor
- 8.2.2.5 Output Capacitor
- 8.2.2.6 VCC Decoupling Capacitor
- 8.2.2.7 Input Capacitor
- 8.2.2.8 Current Sense Filter
- 8.2.2.9 RSNS, RS2 and Current Limit
- 8.2.2.10 Control Loop Compensation
- 8.2.2.11 Efficiency Calculations
- 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(shù)據(jù) (封裝 | 引腳)
- DGS|10
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
8.1 Application Information
The most common circuit controlled by the LM5022 is a non-isolated boost regulator. The boost regulator steps up the input voltage and has a duty ratio D in Equation 2.
where
- VD is the forward voltage drop of the output diode
The following is a design procedure for selecting all the components for the boost converter circuit shown in Figure 14. The application is in-cabin automotive, meaning that the operating ambient temperature ranges from –20°C to 85°C. This circuit operates in continuous conduction mode (CCM), where inductor current stays above 0 A at all times, and delivers an output voltage of 40 V ±2% at a maximum output current of 0.5 A. Additionally, the regulator must be able to handle a load transient of up to 0.5 A while keeping VO within ±4%. The voltage input comes from the battery or alternator system of an automobile, where the standard range of 9 V to 16 V and transients of up to 32 V must not cause any malfunction.