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A soft start controller of a load switching device and a load switching device

A technology of load switch and soft start, applied in the direction of output power conversion device, electrical components, etc., can solve the problems of multi-area, large resistance and large capacitor occupation, and rising cost of chip electronic system, so as to simplify the circuit structure and optimize the circuit. cost effect

Active Publication Date: 2018-12-21
SOUTHCHIP SEMICON TECH SHANGHAI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The soft-start controller of the existing load switching device is usually composed of a resistor with a large resistance and a capacitor with a large capacitance. Both a large resistor and a large capacitor will occupy a relatively large area, resulting in an increase in the cost of the chip and the entire electronic system

Method used

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  • A soft start controller of a load switching device and a load switching device
  • A soft start controller of a load switching device and a load switching device
  • A soft start controller of a load switching device and a load switching device

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Embodiment Construction

[0024] In order to make the above objects, features and beneficial effects of the present invention more obvious and understandable, the prior art and specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] figure 1 It is a structural schematic diagram of a load switch device in the prior art.

[0026] Please refer to figure 1 , the load switch device 3 may be an integrated circuit chip, and the integrated circuit chip has an input terminal VIN, an output terminal VOUT and a ground terminal GND. The load switch device 3 includes a soft-start controller 1, a gate driver 2 a...

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Abstract

The invention relates to a soft start controller of a load switching device and a load switching device, The soft start controller comprises: an error amplifier, receiving a ramp voltage at a first input of the error amplifier, receiving an associated voltage at a second input terminal of the error amplifier, outputting a control signal at an output terminal of the error amplifier, the associatedvoltage varying with a change of a driving voltage, the voltage value of the ramp voltage gradually increasing with time, and transmitting the driving voltage to a control terminal of the load switch;a pull-down module is connected with the control terminal of the load switch at the input end of the pull-down module, the output end of the pull-down module is grounded, and the pull-down module isadapted to determine whether to discharge power to the control terminal of the load switch according to the control signal. The technical proposal of the invention can effectively save the area of theswitching load device and optimize the circuit cost.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a soft start controller of a load switch device and the load switch device. Background technique [0002] In an electronic system, a load switch device is usually used to connect or isolate two electrical ports. For example, if the first electrical port is connected to a power supply and the second electrical port is connected to a load, the load switch device can be used to It is used to cut off or connect the power supply for the load. In practical applications, if the load switching device directly connects the power supply to the load, a surge current will be generated in the circuit. At this time, it may cause overcurrent protection in the circuit, thereby suspending the work of the entire circuit system, and May cause load damage. [0003] In order to prevent the impact of the surge current on the circuit, it is usually necessary to control the load switching ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/34H02M1/36H02M1/08
CPCH02M1/08H02M1/34H02M1/36
Inventor 韩颖杰
Owner SOUTHCHIP SEMICON TECH SHANGHAI CO LTD
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