What is a power switcher?
A Power Switch provides an electrical connection from a voltage source or ground to a load. This set of electronic switches is used to select and transition between two or more input power paths to a single output while also providing input power protection.
What is a switching power adapter used for?
Switching power supplies are primarily used in digital systems such as telecommunication devices, computing equipment, audio equipment, mobile phone chargers, medical test devices, arc welding equipment and automotive chargers.
How can I switch between two power sources?
Portable equipment that can operate from a battery pack or an external power source (such as a wall-adapter or external supply) needs to be able to smoothly switch between the two power sources. This application note describes a circuit ( Figure 1) that switches power sources with good efficiency and without switching noise.
Is there a way to disconnect both power sources?
If both power sources are connected at the same time, I want some kind of electrical switch, that would disconnect the battery and power the circuit just from the 5V USB. But the circuit still has to work, when only one of the sources is present. I tried to design a switch using two mosfets, but I was not able to figure out a working circuit.
Can a battery be switched to an external power source?
A similar version of this article appeared in the May 13, 2002 issue of Electronic Design magazine. Portable equipment that can operate from a battery pack or an external power source (such as a wall-adapter or external supply) needs to be able to smoothly switch between the two power sources.
What kind of power do I need for a circuit?
I am designing a circuit, which can use either 5V from USB, or some higher voltage (7-12V) from a battery. If both power sources are connected at the same time, I want some kind of electrical switch, that would disconnect the battery and power the circuit just from the 5V USB.