Battery protection chip, polling detection circuit and method based on battery protection chip

A polling detection circuit based on a battery protection chip, comprising:

• a polling signal generator, for receiving a basic clock signal and a plurality of state signals each representing a trigger state of a corresponding one of a plurality of detection items of the battery protection chip, and generating a first selection signal and a second selection signal based on the basic clock signal, the plurality of state signals and a priority of the plurality of detection items, wherein the first selection signal and the second selection signal represent a same item to be detected in a next polling detection validity period;
• an input array selector, connected to the polling signal generator, for receiving a plurality of reference signals and a plurality of feedback signals corresponding to the plurality of detection items, and selecting one of the plurality of reference signals and one of the plurality of feedback signals to output based on the first selection signal;
• a comparator, connected to the input array selector, for performing comparison between the feedback signal and the reference signal that are received and outputting an indication signal correspondingly;
• and
• an output sampler, respectively connected with the comparator and the polling signal generator to receive the second selection signal and the indication signal, for obtaining a sampling result by sampling the indication signal according to the second selection signal and updating the plurality of state signals according to the sampling result.