A load state detection circuit and power supply chip
A load state detection and circuit technology, which is applied in the direction of load supply circuit, circuit device, battery disconnection circuit, etc., can solve the problems of reducing energy consumption, automatic start-up, and power chip can not be satisfied at the same time, and achieve the effect of reducing energy consumption
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Embodiment 1
[0054] Please refer to Figure 1 to Figure 2 ,in, figure 1 is a schematic structural diagram of a load state detection circuit according to Embodiment 1 of the present invention; figure 2 It is a schematic structural diagram of the power supply chip in Embodiment 1 of the present invention
[0055] Such as figure 1 As shown, the load state detection circuit 10 of this embodiment includes a constant voltage source module 100, a power supply module 200, and a signal module 300. The power supply module 200 includes a first resistor 210 and a first transistor 220. The first transistor 220 is an NPN type triode, the first end of the first resistor 210 is connected to the output end of the constant voltage source module 100, and the second end of the first resistor 210 is connected to the collector of the first transistor 220, so The collector and the base of the first transistor 220 are connected, and the emitter of the first transistor 220 is used to connect the load 30;
[0...
Embodiment 2
[0082] Please refer to Figure 3 to Figure 5 , image 3 is a schematic circuit diagram of a load state detection circuit according to Embodiment 2 of the present invention; Figure 4 It is a schematic diagram of the waveform of the load state detection circuit in the second embodiment of the present invention when it is connected to a constant voltage load; Figure 5 It is a schematic diagram of the waveform of the load state detection circuit in the second embodiment of the present invention when it is connected to a constant current load or a constant resistance load.
[0083] Such as image 3 As shown, this embodiment provides a load state detection circuit 10 , and the load state detection circuit 10 includes a constant voltage source module 100 , a power supply module 200 and a signal module 300 .
[0084] The constant voltage source module 100 includes a constant current source 110, a current mirror 120, and a voltage regulating resistor interface 130. The voltage reg...
Embodiment 3
[0113] Please refer to Figure 6 to Figure 8 ,in, Figure 6 is a schematic circuit diagram of a load state detection circuit according to Embodiment 3 of the present invention; Figure 7 It is a schematic diagram of the waveform of the load state detection circuit in the third embodiment of the present invention when it is connected to a constant current load or a constant resistance load; Figure 8 yes Figure 7 Partial enlarged schematic diagram of part A in the middle.
[0114] Such as Figure 6 As shown, this embodiment provides a load state detection circuit 10, which is different from the load state detection circuit 10 in [Embodiment 2] as follows:
[0115] The load state detection circuit 10 also includes a timing module 400, the timing module 400 also includes a timing power supply sub-module 410, an automatic reset timer 420, and the timing power supply sub-module 410 is used for the automatic reset timer 420 provides the electric energy required for operation, ...
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