公开(公告)号：US11665800B2

公开(公告)日：2023-05-30

申请号：US17552507

申请日：2021-12-16

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Gregory Michael Fattig ,  Ramesh Selvaraj ,  Ron Vincent Ocampo

IPC: H05B45/30 ,  H05B45/375 ,  H05B45/38

CPC classification number: H05B45/375 ,  H05B45/38

Abstract: Described herein are systems and methods for operating DC-DC regulators such as LED drivers. Various embodiments herein allow a DC-DC regulator to switch between buck mode and buck-boost mode without suffering effects otherwise resulting from transient currents when switching between modes. In certain embodiments, this is accomplished by operating the DC-DC regulator in a buck-boost mode to charge a boost capacitor with a substantially constant inductor current. The inductor current is also used to control a set of switches to operate the DC-DC regulator in a buck mode to drive a load by using the capacitor as a power source.

公开(公告)号：US20230247741A1

公开(公告)日：2023-08-03

申请号：US18088529

申请日：2022-12-24

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Ron Vincent Ocampo ,  Ramesh Selvaraj

IPC: H05B45/54 ,  H05B45/375 ,  H05B45/38 ,  H05B45/345 ,  H05B45/325 ,  H05B45/36

CPC classification number: H05B45/54 ,  H05B45/375 ,  H05B45/38 ,  H05B45/345 ,  H05B45/325 ,  H05B45/36

Abstract: Described are light emitting diode (LED) and non-LED driver systems and methods that reduce current overshoot and, deadtime, and other undesirable effects in applications such as adaptive driving beam headlamp application that negatively impact circuit parameters, including efficiency. In certain embodiments, this is accomplished by using a current clamp circuit that is controlled such as to limit an overshoot in load current, e.g., when a number of LEDs that are turned on changes.

公开(公告)号：US11943851B2

公开(公告)日：2024-03-26

申请号：US17881491

申请日：2022-08-04

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Ron Vincent Ocampo ,  Ramesh Selvaraj

IPC: H05B45/3725 ,  H02M1/32 ,  H02M3/158 ,  H05B45/10 ,  H05B45/325

CPC classification number: H05B45/3725 ,  H02M1/32 ,  H02M3/1582 ,  H05B45/10 ,  H05B45/325

Abstract: Described herein are systems and methods for generating short load current pulses using an H-bridge. In various embodiments, this is accomplished by controlling, in a shunting mode, a low-side switch of the H-bridge to drive a first average current and controlling, in a non-shunting mode, a high-side switch of the H-bridge to drive a second average current such that the first and second average currents are substantially the same and reduce a current pulse width of the load current.

公开(公告)号：US11737190B2

公开(公告)日：2023-08-22

申请号：US17373775

申请日：2021-07-13

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Ron Vincent Ocampo ,  Ramesh Selvaraj

IPC: H05B45/30 ,  H05B45/50 ,  H05B45/38 ,  H05B45/375

CPC classification number: H05B45/50 ,  H05B45/375 ,  H05B45/38

Abstract: The present disclosure relates generally to systems and methods for transient response improvements in electrical circuits. More particularly, the present disclosure relates to systems and methods for suppressing overshoot currents and overshoot durations in circuits using switching regulators, such as driver circuits for LED applications. Embodiments of the invention relate to an LED driver that utilizes transient suppression systems and method for LED applications.