ZHCSUJ4B January 2022 – January 2024 TPS61376
PRODUCTION DATA
- 1
- 1 特性
- 2 應(yīng)用
- 3 說(shuō)明
- 4 Pin Configuration and Functions
- 5 Specifications
-
6 Detailed Description
- 6.1 Overview
- 6.2 Functional Block Diagram
- 6.3
Feature Description
- 6.3.1 VCC Power Supply
- 6.3.2 Enable and Programmable UVLO
- 6.3.3 Soft Start and Inrush Current Control During Start-Up
- 6.3.4 Switching Frequency
- 6.3.5 Adjustable input average Current Limit
- 6.3.6 Shut Down and Load Disconnect
- 6.3.7 Overvoltage Protection
- 6.3.8 Output Short Protection
- 6.3.9 Thermal Shutdown
- 6.4 Device Functional Modes
- 7 Application and Implementation
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RYH|13
散熱焊盤(pán)機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購(gòu)信息
6.4.2 Auto PFM Mode
The TPS61376 provides a seamless transition from PWM to PFM operation with smooth on-time/off-time (SOO) mode and enables automatic pulse-skipping mode that provides excellent efficiency over a wide load range. As load current decreasing or VIN rising, the output of the internal error amplifier decreases to lower the inductor peak current, delivering less power to the load. When the output of the error amplifier goes down and reaches a threshold of about 350-mA peak current, the output of the error amplifier is clamped at this value and does not decrease any more, the TPS61376 extends its off-time of the switching period to deliver less energy to the output and regulate the output voltage to the target.
With SOO mode, the TPS61376 keeps the output voltage equal to the setting voltage in PFM mode. In addition, the output voltage ripple is much smaller at light load due to low peak current. Refer to Figure 6-2.
Figure 6-2 Auto PFM
Mode Diagram