ZHCSOE3E August 2021 – September 2023 LMR38020
PRODUCTION DATA
- 1
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Fixed Frequency Peak Current Mode Control
- 8.3.2 Adjustable Output Voltage
- 8.3.3 Enable
- 8.3.4 Switching Frequency and Synchronization (RT/SYNC)
- 8.3.5 Power-Good Flag Output
- 8.3.6 Minimum On Time, Minimum Off Time, and Frequency Foldback
- 8.3.7 Bootstrap Voltage
- 8.3.8 Overcurrent and Short Circuit Protection
- 8.3.9 Soft Start
- 8.3.10 Thermal Shutdown
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Device and Documentation Support
- 11Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DDA|8
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DDA|8
訂購(gòu)信息
9.2.2.8 External UVLO
In some cases, an input UVLO level different than that provided internal to the device is needed. This can be accomplished by using the circuit shown in Figure 9-2. The turn-on voltage is designated as VON while the turn-off voltage is VOFF. First, a value for RENB is chosen in the range of 10 kΩ to 100 kΩ, then Equation 13 and Equation 14 are used to calculate RENT and VOFF.
Figure 9-2 Setup for External UVLO ApplicationEquation 13.
Equation 14.
where
- VON = VIN turn-on voltage
- VOFF = VIN turn-off voltage