三极管 KA7809 PDF 引脚图

     The KA78XX/KA78XXA series of three-terminal positiveregulator are  available  in the TO-220/D-PAK

package and with several fixed output voltages,  making them useful in a wide range of applications. Each type employs

internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. If

adequate heat sinking is provided, they can deliver  over 1A output current. Although designed primarily as fixed voltage

 regulators, these devices can be used with external  components to obtain adjustable voltages and currents.

KA7809 图片