The recent is the peak of mobile phone conferences of major brand manufacturers. Huawei, Nokia, Xiaomi and others have released their own flagship phones, each with its own characteristics and full of bright spots, becoming the focus of people after dinner. Among them, the Xiaomi MAX3 released in the Forbidden City a few days ago is undoubtedly one of the most watched models because of its large battery capacity. This time the Xiaomi MAX3 has a battery capacity of 5500mAh and is known as the Xiaomi mobile phone with the largest battery ever.
With the increase in mobile phone applications, battery life has always been the focus of people's complaints. The battery power of ordinary mobile phones is about 3000 to 4000 mAh. The battery of Xiaomi MAX3 is really impressive, so how does it do it?
The role of power management chip
Speaking of the battery of Xiaomi MAX3, we must mention its power management chip, because this is the core part of improving the battery power. I mainly use the power management chip to explain its impact on the battery power. Nowadays, we cannot do without mobile phones. The power management chip in the mobile phone is responsible for the intelligent charging management of the battery, over-voltage, over-current, over-temperature, and short-circuit protection, providing multiple voltage power supply for other ICs in the mobile phone, and mobile phones that support OTG. It is also responsible for the output of the usb voltage, switching management between the line power supply and the backup battery. The power management chip is indispensable to the electronic system, and its performance has a direct impact on the performance of the whole machine.
The power management chip is a chip that is responsible for the conversion, distribution, detection and other power management responsibilities of electric energy in the electronic equipment system. It is mainly responsible for identifying the power supply amplitude of the CPU, generating the corresponding short moment wave, and promoting the power output of the subsequent circuit. . Power management chips are divided into dual in-line chips and surface mount package chips.
How does the power management chip work?
The more functions and performance of electronic equipment, the more complex its structure, technology, and system are. The more difficult it is for traditional analog power management ICs to meet the overall power management requirements of the system, and the more expensive it is. The power management chip supports two/three/four-phase power supply, supports the VRM9.0 specification, the voltage output range is 1.1V-1.85V, the output can be adjusted at 0.025V intervals, and the switching frequency is up to 80KHz. It has large power supply, small ripple, Features such as small internal resistance, can precisely adjust the CPU power supply voltage.
The core of the digital controller is mainly composed of three special modules: anti-aliasing filter, analog-to-digital converter and digital pulse width modulator. In order to achieve the same performance indicators as the analog control architecture, it is necessary to have high resolution, high speed and linear ADC and high resolution, high speed PWM circuit design. The ADC resolution must be able to meet the range where the error is less than the allowable variation of the output voltage. The smaller the required output voltage ripple, the higher the resolution requirement of the ADC.
Since anti-aliasing filters and pipelined or SAR analog-to-digital converters will introduce loop delays, we urgently need high-sampling-rate analog-to-digital converters. Analog controllers have inherent limitations on the possible pulse widths that can be generated, while DPWM can generate discrete and limited sets of PWM widths. DPWM is part of the feedback loop. The resolution of DPWM must be high enough so that the output does not display the well-known Limit weekly value, the minimum number of digits required to not display any limit weekly value depends on topology, output voltage and ADC resolution.
Broad application prospects of power management chips
The application range of power management chips is very wide. The development of power management chips is of great significance for improving the performance of the whole machine. The choice of power management chips is directly related to the needs of the system, and the development of digital power management chips needs to overcome cost difficulties.
With the release of Xiaomi MAX3, it is believed that more and more manufacturers will pay attention to the impact of power management chips on battery power. In addition to mobile phone manufacturers, many brands that require battery support, such as wearable and smart products, will study related technologies. The broad application prospects of management chips will be even broader.
Transformer For Shore Power Supply
Transformer For Shore Power,Safe Power Supply For Ships,Shore Power Isolation Transformer,Shore Power Transformer
SANON DOTRANSÂ Co., Ltd. , https://www.sntctransformer.com