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.

公开(公告)号：US12207367B2

公开(公告)日：2025-01-21

申请号：US18131407

申请日：2023-04-06

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Ron Vincent Ocampo

IPC: H05B45/30 ,  H02M1/00 ,  H02M1/08 ,  H02M1/32 ,  H02M3/158 ,  H05B45/36 ,  H05B45/3725 ,  H05B45/375 ,  H05B45/38

Abstract: Presented are systems and methods for controlling a compensation circuit. In embodiments, a detection circuit receives a set of control signals that have been generated by a control circuit to drive a set of light emitting diode (LED) switches. The switches control a set of LEDs driven by a DC-DC converter that is coupled to a feedback loop to which the compensation circuit is removably coupled. In embodiments, the detection circuit determines whether the status of an LED is about to change and, in response, uses the compensation circuit to control the feedback loop in a manner such as to reduce a current overshoot or current undershoot in the LED current.

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：US12137503B2

公开(公告)日：2024-11-05

申请号：US18134459

申请日：2023-04-13

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Ron Vincent Ocampo

IPC: H05B45/37 ,  H02M1/00 ,  H02M1/08 ,  H02M1/32 ,  H02M3/158 ,  H05B45/36 ,  H05B45/3725 ,  H05B45/375 ,  H05B45/38

Abstract: Presented are average current mode control systems and methods for driving a load with a constant current. In embodiments, this is accomplished when, in response to a zero-current detection circuit detecting a zero current condition in the load current, a compensation circuit is disconnected from a first error amplifier to enable that error amplifier to provide a first voltage to a second error amplifier. The second error amplifier increases a charging current in a capacitor to reduce a dead time in the load current. Similarly, in response to an overcurrent detection circuit detecting an overcurrent condition in the load current, the compensation circuit is disconnected from the first error amplifier to enable the first error amplifier to provide a second voltage to the second error amplifier to decrease the charging current and reduce an overshoot condition.

公开(公告)号：US20230344347A1

公开(公告)日：2023-10-26

申请号：US18134461

申请日：2023-04-13

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Ron Vincent Ocampo

IPC: H02M3/158 ,  H05B45/3725

CPC classification number: H02M3/1582 ,  H05B45/3725

Abstract: Presented are systems and methods for improving transient response in buck-boost circuits avoid circuit instabilities in both boost mode and buck mode. In embodiments, this is accomplished when, in response to determining that the circuit operates in buck mode, a compensation circuit is adjusted to operate at a first bandwidth. In response to determining that the circuit operates in boost mode, the compensation circuit may then be adjusted to decrease a boost mode crossover frequency and operate at a second, lower bandwidth.

公开(公告)号：US12219677B2

公开(公告)日：2025-02-04

申请号：US18134461

申请日：2023-04-13

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Ron Vincent Ocampo

IPC: H05B45/30 ,  H02M1/00 ,  H02M1/08 ,  H02M1/32 ,  H02M3/158 ,  H05B45/36 ,  H05B45/3725 ,  H05B45/375 ,  H05B45/38

Abstract: Presented are systems and methods for improving transient response in buck-boost circuits avoid circuit instabilities in both boost mode and buck mode. In embodiments, this is accomplished when, in response to determining that the circuit operates in buck mode, a compensation circuit is adjusted to operate at a first bandwidth. In response to determining that the circuit operates in boost mode, the compensation circuit may then be adjusted to decrease a boost mode crossover frequency and operate at a second, lower bandwidth.

公开(公告)号：US20230345602A1

公开(公告)日：2023-10-26

申请号：US18131407

申请日：2023-04-06

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Ron Vincent Ocampo

IPC: H05B45/375 ,  H05B45/38 ,  H05B45/36

CPC classification number: H05B45/375 ,  H05B45/36 ,  H05B45/38

Abstract: Presented are systems and methods for controlling a compensation circuit. In embodiments, a detection circuit receives a set of control signals that have been generated by a control circuit to drive a set of light emitting diode (LED) switches. The switches control a set of LEDs driven by a DC-DC converter that is coupled to a feedback loop to which the compensation circuit is removably coupled. In embodiments, the detection circuit determines whether the status of an LED is about to change and, in response, uses the compensation circuit to control the feedback loop in a manner such as to reduce a current overshoot or current undershoot in the LED current.

公开(公告)号：US20230344340A1

公开(公告)日：2023-10-26

申请号：US18134459

申请日：2023-04-13

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Ron Vincent Ocampo

IPC: H02M3/158 ,  H02M1/08 ,  H02M1/00 ,  H02M1/32

CPC classification number: H02M3/158 ,  H02M1/083 ,  H02M1/0009 ,  H02M1/32 ,  H02M1/0012 ,  H02M1/0058

Abstract: Presented are average current mode control systems and methods for driving a load with a constant current. In embodiments, this is accomplished when, in response to a zero-current detection circuit detecting a zero current condition in the load current, a compensation circuit is disconnected from a first error amplifier to enable that error amplifier to provide a first voltage to a second error amplifier. The second error amplifier increases a charging current in a capacitor to reduce a dead time in the load current. Similarly, in response to an overcurrent detection circuit detecting an overcurrent condition in the load current, the compensation circuit is disconnected from the first error amplifier to enable the first error amplifier to provide a second voltage to the second error amplifier to decrease the charging current and reduce an overshoot condition.

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.