A mobile phone switch circuit and a mobile phone architecture based on the circuit

Abstract

The invention provides a mobile phone power on-off circuit which includes a first alternation gate, a second alternation gate, a first power on trigger unit and a second power on trigger unit; a first input pin of the first alternation gate is connected with the first input pin of the second alternation gate; the first power on trigger unit and the second power on trigger unit are connected in the middle; a second input pin of the first alternation gate is connected with a first IO port on an application processor; a third output pin of the first alternation gate is connected with a normally-opened power of a system; the second input pin of the second alternation gate is connected with a second IO port arranged on the application processor; the third output pin is connected with the gate-controlled power of the system; the first IO port and the second IO port are used for locking the power of the system; the first power on trigger unit is used for receiving a real time clock power-on signal or a charging power-on signal; the second power on trigger unit is used for receiving a power on-off keystroke signal. Three DC-DC converters, one LDO and a plurality of simple logical apparatus are used for realizing a plurality of power on-off modes; the mobile phone power on-off circuit is suitable for any mobile phone platforms.

Description

technical field [0001] The invention relates to the technical field of mobile communication terminals, in particular to a mobile phone switch circuit and a mobile phone architecture based on the circuit. Background technique [0002] Along with the progress of communication network technology, mobile phone (or claiming mobile phone) has become one of present modal communication tool. The mobile phone architecture includes power management module, AP (Application Processor, application processor) and wireless communication module. Generally speaking, the power management module is equivalent to a power supply bureau, which processes the voltage from the power plant (mobile phone battery, VBAT) (Output different voltage values) to provide suitable and stable power supply voltage according to the needs of each component. In the prior art, the power management module of the mobile phone is a PMU (Power Management Unit, power management unit) chip. The PMU chip is close to the ...

AI Technical Summary

Problems solved by technology

In the existing technology, a PMU development board may cost hundreds of thousands of RMB, so the development cost of the PMU chip is relatively high

[0004] In addition, the development of the PMU chip in the prior art needs to first determine a clear application customer. This is because the design of the PMU chip lacks versatility. The PMU chip in the prior art is customized for a specific mobile phone solution, for example, due to Considering heat dissipation, the charger is placed outside the PMU. Another example is the LED driver used for the backlight. Gary pointed out that there may be three situations where it is not necessary to integrate the backlight LED driver. 1. The display itself integrates the LED driver; 2. . The display does not use LED backlight, but CCFL (Cold Cathode Fluorescent Lamp, Cold Cathode Fluorescent Lamp) backlight; 3. In order to avoid the problem of long-term PCB (Printed Circuit Board, printed circuit board), it is necessary to use LED The driver should be as close as possible to the display screen, and the PMU chip designer will design a dedicated chip according to the above requirements

Although the customization of PMU can increase or decrease some modules or adjust performance parameters according to customer requirements, it has the advantages of high integration and full of personality, but after the PMU chip design is completed, special software needs to be solidified and packaged.

Therefore, after the PMU chip design is completed, its settings cannot be changed, and it is only applicable to a dedicated mobile phone platform

For new mobile phone solutions, such as the mobile phone solution using AP model VC0818, it is difficult for technicians to find a PMU chip with switch function according to the needs of the mobile phone solution

As can be seen from this, the PMU chip in the prior art has the shortcomings of not being flexible enough and lacking versatility

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