FAST OVER VOLTAGE AND SURGE DETECTION FOR HIGH SPEED AND LOAD SWITCHES
FIG1 illustrates a connection scheme of a printed circuit board (PCB) in accordance with embodiments described herein
FIG1 illustrates a connection scheme 100 of a printed circuit board (PCB) 105 in accordance with embodiments described herein. The PCB 105 may be connected through a pad 110a on a connector/device side through a PCB line 115 to a connector 120. The connector 120 may be a USB Type-C connector or the like. The PCB 105 may be connected through a second pad 110b on a processor/host side through the PCB line 115 to a host (not illustrated). The host side may include a processor or other load. The connector 120 may receive an opposing connector attached to a cable 125 or other device.
scheme
130
protection circuit
1
be is
100
connection scheme may be less than
105
PCB
138
output signal
115
PCB line
125
cable
140
switches switch
135
gates
120
connector
['1. A protection circuit, comprising: a pad configured to input an external voltage from a connector; a first circuit branch connected to the pad and configured to receive a fast ramp-up surge at the pad; a second circuit branch connected to the pad and configured to receive a ramp-up surge at the pad; a third circuit branch connected to the pad and configured to output a surge detection signal when a surge voltage is received at the pad; an enabling transistor connected between the second circuit branch and the third circuit branch; at least one switch to be protected; and a controller configured to control components of the second circuit branch and third circuit branch of the protection circuit based on an on-state of the at least one switch to be protected.']