A high power factor constant current control circuit with open circuit protection
A technology of constant current control circuit and high power factor, which is applied in the direction of emergency protection circuit device, AC power input conversion to DC power output, output power conversion device, etc., which can solve the problems of high cost, poor reliability, and large occupied area. , to achieve the effect of low cost, high reliability and small size
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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0022] Aiming at the problems existing in the prior art, the embodiment of the present invention proposes a high power factor constant current control circuit with open-circuit protection, which adds an open-circuit protection control circuit to the constant-current drive chip, and the open-circuit protection control circuit is in the load When an open circuit occurs, an open circuit detection signal is output to the pulse signal generation circuit, and the pulse signal generation circuit drives the switch circuit to turn off according to the open circuit detection signal.
[0023] figure 1 The ci...
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