I see a lot of USB controllers in battery charging circuits. They have USB host controllers, embedded controller and USB port controller at host side. (Refer tps2547 )
- Can somebody tell me what are the minimum control and protection circuits needed for charging using USB?
- Is it the sole responsibility of the host to ensure reliable power to whichever device it is powering ? Is there any protection or control circuitry at device side, say load switches or similar kind?
Iam lost in the vast pool of resources with so many standards and specifications. Please note that Iam primarily looking for power transfer through USB.