Patent ID: 11880217
Assignee: CHENGDU MONOLITHIC POWER SYSTEMS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 9:
10. The power management circuit of claim 7, wherein the constant time generator comprises:
a current source having an input terminal configured to receive a supply voltage and an output terminal;
a first capacitor having a first terminal and a second terminal, wherein the first terminal is coupled to the output terminal of the current source, and the second terminal is coupled to the ground pin;
a discharge switch having a first terminal, a second terminal and an output terminal, wherein the first terminal is coupled to the output terminal of the current source, the second terminal is coupled to the ground pin, and the control terminal is coupled to the first comparison circuit to receive the first comparison signal; and
a second comparison circuit configured to compare a voltage at the first terminal of the first capacitor with a reference voltage and provide the constant time control signal.