Patent ID: 11888399
Assignee: ROHM CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 19:
20. A power management IC with N channels (N≥3), comprising:
N (N≥3) feedback pins;
and
N circuit blocks each comprising a feedback controller and a pre-driver,
wherein the power management IC is integrated on a semiconductor substrate,
wherein, in a first mode in which N circuit blocks operate independently, in each circuit block, the feedback controller generates a first control signal which is a pulse signal of which duty cycle is adjusted such that a signal at the corresponding feedback pin approaches to a predetermined reference voltage, and the pre-driver operates according to the first control signal,
wherein, in a second mode in which M (<N) circuit blocks from among the N circuit blocks operate in a cooperative manner, (i) in a master circuit block, which is one from among the M circuit blocks, the feedback controller generates the first control signal which is a pulse signal of which duty cycle is adjusted such that a signal at the corresponding feedback pin approaches to a predetermined voltage and supply a third pulse signal according to the first pulse signal to the other M−1 circuit blocks, and the pre-driver operates according to the first control signal, and (ii) in the other M−1 circuit blocks other than the master circuit block, the pre-driver operates according to the third control signal received from the master circuit block,
and wherein the first mode and the second mode are switchable.