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Adaptive Stability Control for Driver Circuits

A driver and circuit technology, which is applied in the field of adaptive stability control for driver circuits, can solve problems that are not suitable for use cases, and it is impossible to predict what device the PMIC is used for, etc.

Active Publication Date: 2019-04-26
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Further exacerbating the problem is the inability of conventional PMIC designs to predict what devices the PMIC will be used in (smart phones, computer tablets, portable cameras, etc.) and how these devices will be used by the end user
Therefore, a given PMIC can be exposed to a wide range of headroom voltage conditions and load conditions, and thus its design is not suitable for all use cases

Method used

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  • Adaptive Stability Control for Driver Circuits
  • Adaptive Stability Control for Driver Circuits
  • Adaptive Stability Control for Driver Circuits

Examples

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Embodiment Construction

[0021] In the following description, for purposes of explanation, numerous examples and specific details are set forth in order to provide a thorough understanding of the present disclosure. However, it is obvious to those skilled in the art that the present disclosure as expressed in the claims may include some or all of the features of these examples alone or in combination with other features described below, and may further include the features described herein Modifications and equivalent forms of and concepts.

[0022] figure 1 A circuit 100 according to the present disclosure is shown. In some embodiments, circuit 100 may include a driver stage 112 having a drive output 112 a that may be connected to drive load 10 . In general, load 10 can be any type of load. In some embodiments, load 10 may be an LED flash component of a camera; for example, a digital camera, or a camera in a portable computing device such as a tablet computer, smartphone, or the like.

[0023] T...

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Abstract

A circuit for driving a load may include a control loop having a responsive characteristic. The headroom signal indicative of the headroom voltage of the circuit may set one or more parameters of the response characteristic. A load signal indicative of the electrical load on the circuit may further set the response characteristics.

Description

[0001] related application [0002] This application claims the benefit of US Provisional Application No. 14 / 293,489, filed June 2, 2014, which is hereby incorporated by reference in its entirety for all purposes. Background technique [0003] Unless otherwise indicated, the foregoing is not admitted to constitute prior art to the claims presented herein and likewise should not be so construed. [0004] With the integration of high resolution cameras into mobile devices such as smartphones and computing tablets, high pixel (eg >5M pixel) cameras typically require high current (eg >1A) flash LEDs. Therefore, power consumption of a power management IC (PMIC) including a flash LED driver is increased. Because the flash LED driver is one of the higher power consumption blocks in a PMIC, minimizing power dissipation from the flash LED driver is an important consideration in PMIC designs to extend battery life and reduce thermal risk. [0005] Typically, a flash LED driver ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K3/01H05B33/08H05B44/00
CPCH03K3/01H05B45/10H05B45/50H05B45/37H05B45/395Y02B20/30H05B45/397
Inventor X·彭S·C·德哈T·斯托克斯塔德
Owner QUALCOMM INC