| 摘要 |
<p>An electrical device (10) includes a package (20) having an array of connections, a thermally conductive, electrically insulative substrate (12) in the package, a plurality of polymeric positive temperature coefficient (PPTC) resistors (14) in the package in thermal contact with the substrate, and, at least one heating element such as a power field effect transistor (16) in thermal contact with the substrate, for indirectly heating the PPTC resistors in response to a control current, thereby to trip the PPTC resistors from a low resistance state to a very high resistance state. A method for controlling a plurality of electrical loads is also disclosed.</p> |
