Control circuit for constant-current drive circuit and constant-current drive circuit

A control circuit for a constant-current drive circuit, comprising:

• an output information detection module coupled to an output terminal of the constant-current drive circuit and configured to detect output information at the output terminal of the constant-current drive circuit;
• a reference information generation module coupled to an output current sampling terminal of the constant-current drive circuit and configured to generate reference information based on a sampled peak output current of the constant-current drive circuit;
• a rapid start signal generation module having an input terminal coupled to output terminals of the output information detection module and the reference information generation module and configured to receive the output information and the reference information and generate a rapid start signal configured to indicate whether it enters into a rapid start phase or exits from a rapid start phase;
• and
• a control signal generation module having an input terminal coupled to an output terminal of the rapid start signal generation module and configured to receive the rapid start signal and generate a control signal according to the rapid start signal, the control signal configured to control a power switching transistor in the constant-current drive circuit to drive a load.