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Power adapter and electronic equipment suitable for the same

A technology for power adapters and electronic equipment, applied to electrical components, output power conversion devices, and conversion of AC power input to DC power output. The effect of system power-off, efficiency improvement, and circuit simplification

Active Publication Date: 2016-07-13
HEFEI LCFC INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1) The protection scheme for the voltage and current of the matching power adapter will make the design on the motherboard very complicated, and a large number of verifications are required to optimize the circuit, and sometimes it needs to rely on the EC. If the EC crashes or is busy protection will not be enforced when
[0007] 2) The solution for the unmatched power adapter will directly remove its voltage from the motherboard, which will cause the system to be powered off
[0008] 3) Unable to implement temperature protection for the power adapter

Method used

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  • Power adapter and electronic equipment suitable for the same
  • Power adapter and electronic equipment suitable for the same
  • Power adapter and electronic equipment suitable for the same

Examples

Experimental program
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Effect test

no. 1 example

[0034] Such as figure 2 Shown is the structure and connection schematic diagram of the first embodiment of the power adapter and electronic equipment of the present invention. This example is for figure 1 The existing two-terminal power adapter and electronic equipment suitable for the power adapter are improved.

[0035] In this embodiment, the power adapter 10 includes an ADC module 11 , comparators C1 - C4 , a pull-high power supply VH1 , a pull-high resistor RH1 , and an output port 13 .

[0036] Among them, the output port 13 has three terminals P1, P2, and P3. The terminal P1 is used to output the DC signal S1, the terminal P2 is used to output the ground signal S2 of the adapter, and the newly added terminal P3 is used to output the early warning signal S3. Although figure 2 The newly added terminal P3 shown in FIG.

[0037] The first input terminals of the comparators C1-C4 are connected to the ADC module 11, which are respectively used to receive the DC voltage...

no. 2 example

[0048] Such as Figure 4 Shown is the structure and connection schematic diagram of the second embodiment of the power adapter and electronic equipment of the present invention. This example is for image 3 The existing three-terminal power adapter and electronic equipment suitable for the power adapter are improved.

[0049] Three-terminal power adapter and applicable electronic equipment in the prior art such as image 3 shown. The output port 13 of the power adapter 10 includes three terminals P1-P3, which are respectively used to output a DC signal S1, a ground signal S2 of the adapter, and a power identification signal S3'. Wherein, the power identification signal S3' is used for the motherboard 20 to identify the power of the power adapter 10.

[0050] Such as image 3 As shown, the power adapter 10 also includes a pull-down resistor RL, and the terminal P3 of the output port 13 is grounded through the pull-down resistor RL. The main board 20 is also provided with ...

no. 3 example

[0073] The structure diagram of this embodiment is as Figure 5 As shown, it is based on the premise of ensuring functional integrity Figure 4 further simplification. As can be seen from the circuit structure, the circuit structure of the present embodiment, the improved prior art ( image 3 ) change ratio Figure 4 Smaller and easier to implement.

[0074] Compared with the second embodiment, this embodiment omits the second embodiment ( Figure 4 ), the first pull-up power supply VH1 in the power adapter 10 , the first pull-up resistor RH1 , the second control switch K2 , and the third control switch K3 on the motherboard 20 . The specific structure is as Figure 5 As shown, since the structure is basically the same as that of the second embodiment, it will not be described again.

[0075] When the power adapter 10 is connected to the main board 20, the charger will send the adapter insertion signal S4 to the EC24, and the EC24 immediately starts the power detection p...

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Abstract

The invention provides a power adapter. The power adapter includes an ADC module used for converting alternating current to direct current and detecting voltage of the direct current, the power adapter also includes a threshold unit used for outputting a voltage threshold, and a comparator with two input ends connected to the ADC module and the threshold unit respectively and configured to output an early warning signal when the voltage of the direct current is lower than the voltage threshold. The invention also provides electronic equipment suitable for the power adapter. According to the power adapter and the electronic equipment suitable for the power adapter, the output voltage and current of the power adapter and the temperature of the adapter can be protected, and a circuit of a mainboard is simplified while timely early warning is guaranteed.

Description

technical field [0001] The invention relates to a power adapter and electronic equipment suitable for the power adapter, in particular to a power adapter with protection and early warning function and electronic equipment suitable for the power adapter. . Background technique [0002] The DC voltage output by the existing power adapter will be monitored by a monitoring device, such as a charger. Usually, if the voltage of the power adapter connected to the motherboard is too low or too high due to mismatch, the charger will remove the voltage of the power adapter from the motherboard, and the system will be powered off at this time; if the power adapter connected to the motherboard is matched power adapter, such as figure 1 As shown, the power adapter 10 outputs two signals of direct current S1 and adapter ground (that is, the ground signal of the adapter) S2 to the main board 20, and the main board 20 is provided with a peripheral power detection device and a comparator 2...

Claims

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Application Information

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IPC IPC(8): H02M7/00H02M1/32
CPCH02M1/32H02M7/00H02M1/325H02M1/327
Inventor 张施洋
Owner HEFEI LCFC INFORMATION TECH
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