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Seamless switching control for low power battery backup system

A technology of backup power and switching circuits, which is applied in the integration of power network operating systems, information technology support systems, electronic switches, etc., and can solve problems affecting the supply range of the system

Active Publication Date: 2018-08-03
MICROCHIP TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The downside of the diode solution is that while it can be extremely area efficient, the ~0.7V DC voltage drop will severely impact the overall system supply range
Even more area is required if the reference voltage must be provided by a separate circuit

Method used

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  • Seamless switching control for low power battery backup system
  • Seamless switching control for low power battery backup system
  • Seamless switching control for low power battery backup system

Examples

Experimental program
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Embodiment Construction

[0016] figure 1 A block diagram of a system 100 for seamless handover control according to an embodiment of the present invention is illustrated. In one embodiment, system 100 may include switching control for low power systems. In yet another embodiment, the system 100 may include switching control for a battery backup system. Backup and switching control can be performed between any two voltage sources. In the present invention, however, although a voltage source may be considered a primary voltage source, primary voltage source, auxiliary voltage source, battery voltage source, backup voltage source or secondary voltage source, the teachings herein are applicable to any two voltage sources source, regardless of the relationship between the voltage sources.

[0017] In one embodiment, the system 100 can perform the switchover between the primary power supply and the backup power supply fast enough that the client circuits and their operation are not affected. Switching ...

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PUM

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Abstract

A circuit (100) for providing back-up power includes a switching circuit (118, 112) configured to be coupled to a first power source (102) and a second power source (104). The circuit includes a domain voltage level monitor circuit (106) coupled with the first power source and the second power source and with output of the switching circuit (CLIENT DOMAIN). The circuit includes a dynamic level shifter circuit (108) coupled with the first power source and the second power source and an output of the domain voltage level monitor (106). The circuit includes a double controlled latch circuit (110)coupled with the first power source and the second power source and an output of the dynamic level shifter circuit (108). The double controlled latch circuit (110) is configured to provide control signals to the switching circuit (118, 112).

Description

[0001] priority [0002] This application claims priority to US Provisional Application 62 / 327,309, filed April 25, 2016, which is hereby incorporated in its entirety. technical field [0003] The present invention relates to systems with battery backup, and more particularly to systems including microcontrollers with battery backup with seamless switchover control. Background technique [0004] Certain systems require a constant power supply and thus provide battery backup in the event of failure of the main power supply. Conventional solutions for switching control are diode-based or comparator-based. In a diode-based system, a pair of PN diodes connects the anode to the supply (+) pin and the common cathode supplies the client domain. Comparator-based systems are based on standard fast comparators. A comparator senses the value of the supply voltage, compares these values ​​to a reference voltage and further controls the gate of the power switch. The comparator must ...

Claims

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Application Information

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IPC IPC(8): H03K5/24H02J9/06H03K19/003H03K17/693
CPCH03K5/2481H03K17/693H03K19/00315H02J9/061H02J9/06H03K19/018521Y04S20/20Y02B70/30H03K3/356113
Inventor 盖伯尔·罗卡理查德·赫尔Z·M·斯米特勒兹万·诶讷凯斯库A·维德拉萨恩
Owner MICROCHIP TECH INC