ZHCS520E May 1996 – May 2019 LM2586
PRODUCTION DATA.
- 1 特性
- 2 典型 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configurations
- 6 Specifications
- 7 Detailed Description
- 8 Application and Implementation
- 9 Layout
- 10Heat Sink/Thermal Considerations
- 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)
- KTW|7
訂購信息
7.3.6 Frequency Synchronization
Another feature of the LM2586 is the ability to synchronize the switching frequency to an external source, using the sync pin (pin 6). This feature allows the user to parallel multiple devices to deliver more output power.
A negative falling pulse applied to the sync pin will synchronize the LM2586 to an external oscillator (see Figure 24 and Figure 25).
Use of this feature enables the LM2586 to be synchronized to an external oscillator, such as a system clock. This operation allows multiple power supplies to operate at the same frequency, thus eliminating frequency-related noise problems.
Figure 24. Frequency Synchronization 
Figure 25. Waveforms of a Synchronized 12-V Boost Regulator The scope photo in Figure 25 shows a LM2586 12-V boost regulator synchronized to a 200-kHz signal. There is a 700-ns delay between the falling edge of the sync signal and the turning on of the switch.
Figure 26. Boost Regulator