Patent ID: 8471498

Claim:
A current limiting controller for a driver circuit, the current limiting controller comprising: a voltage detector for detecting a fault detection voltage corresponding to a voltage produced across a load by the driver circuit; a current limiter for limiting a current supplied from the driver circuit to the load in response to the fault detection voltage falling below a threshold value; a reset circuit for disabling the current limiter upon expiration of a first time interval after the fault detection voltage falls below the threshold voltage level, the reset circuit allowing the current limiter to limit the current supplied from the driver circuit to the load when the fault detection voltage remains below the threshold voltage after a second time interval, wherein the reset circuit comprises: a delay circuit configured to set the first time interval; a switch having a first state and a second state, the switch being configured in the first state to disable the current limiter, and being configured in the second state to allow the current limiter to respond to the fault detection voltage; and a unijunction transistor configured to set the switch into the first state when the first time interval expires, and to set the switch into the second state when the second time interval expires.