Overcurrent protection circuit and overcurrent protection method

Details Overcurrent protection circuit and overcurrent protection method Overcurrent protection circuit and overcurrent protection method

1998-02-27

1999-11-02

Han, Y. J.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323908, 323303, G05F 1445

Patent

active

059777583

ABSTRACT:
In an overcurrent protection circuit, when a control section turns on a switch in response to a signal from a microcomputer so that power is supplied from a power source to an IC card, a signal controlling section prevents the overcurrent protection circuit from functioning even if a current greater than a predetermined level is detected by a current detecting section, until a voltage of the IC card is stabilized. When the control section turns off the switch in response to a signal from the microcomputer, the power supply from the power source to the IC card is stopped, thereby preventing a malfunction of the overcurrent protection circuit, even if the microcomputer goes out of control or malfunctions.

REFERENCES:
patent: 5568347 (1996-10-01), Shirai et al.
patent: 5710508 (1998-01-01), Watanabe
patent: 5784231 (1998-07-01), Majid et al.

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