ZHCSGG8F July 2011 – March 2018 LM25118
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
- 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 Custom Design With WEBENCH® Tools
- 8.2.2.2 R7 = RT
- 8.2.2.3 Inductor Selection – L1
- 8.2.2.4 R13 = RSENSE
- 8.2.2.5 C15 = CRAMP
- 8.2.2.6 Inductor Current Limit Calculation
- 8.2.2.7 C9 - C12 = Output Capacitors
- 8.2.2.8 D1
- 8.2.2.9 D4
- 8.2.2.10 C1 – C5 = Input Capacitors
- 8.2.2.11 C20
- 8.2.2.12 C8
- 8.2.2.13 C16 = CSS
- 8.2.2.14 R8, R9
- 8.2.2.15 R1, R3, C21
- 8.2.2.16 R2
- 8.2.2.17 Snubber
- 8.2.2.18 Error Amplifier Configuration
- 8.2.3 Application Curves
- 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)
- PWP|20
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- PWP|20
訂購信息
8.2.2.6 Inductor Current Limit Calculation
The current limit for each mode can be calculated using Equation 29 and Equation 31. If the peak current limit is less than the calculated inductor peak current, the R13 and C15 need to be recalculated. This can be done by increasing the previous K values or M and reiterating the calculations.
Equation 30. ILIMIT (BUCK) = 7.37 A
Equation 32. ILIMIT (BUCK-BOOST) = 14.29 A