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What are the common power management chips? What are their functions?
In daily life, people's reliance on electronic devices is becoming increasingly serious. The upgrade of electronic technology also means that people have high expectations for the development of power supply technology. Power management chips are chips that undertake power management responsibilities such as power conversion, distribution, and detection in electronic device systems. They are mainly responsible for identifying the power amplitude of the CPU, generating corresponding short pulses, and driving subsequent circuits to output power. Now, let's introduce the commonly used power management chips and their functions.
Power management ICs can be summarized as follows:
1. DC/DC modulation IC. It includes a boost/step-down voltage regulator and a charge pump.
2. Power factor control PFC pre-modulation IC. It provides a power input circuit with power factor correction function.
3. Pulse modulation or pulse amplitude modulation PWM/PFM control IC. It is a pulse frequency modulation and/or pulse width modulation controller used to drive external switches.
4. Linear modulation IC (such as linear low-dropout voltage regulator LDO, etc.). It includes positive and negative regulators as well as low dropout LDO modulators.
5. Battery charging management IC. It includes battery charging, protection, and power display ICs, as well as "intelligent" battery ICs for battery data communication.
6. Hot-swappable board control IC (to eliminate the impact of inserting or removing other interfaces in the working system).
7. MOSFET or IGBT switching function IC.
Among these power management ICs, the voltage regulator IC is the fastest-growing and most productive part. Various power management ICs are basically related to some related applications, so more types of devices can be listed for different applications.
The technical trend of power management is efficiency, low power consumption, and intelligence. Improving efficiency involves two different aspects: on the one hand, we want to maintain the overall efficiency of energy conversion while reducing the size of the device; on the other hand, while keeping the size unchanged, the efficiency is greatly improved.
In AC/DC conversion, low on-resistance meets the requirements of more efficient adapters and power supplies in computer and telecommunications applications. In power circuit design, the standby power consumption is generally reduced to below 1W, and the power efficiency can be increased to over 90%. To further reduce the existing standby power consumption, new IC manufacturing technologies and breakthroughs in low-power circuit design are needed.
Power management IC chips mainly manage the power conversion, distribution, and detection of electricity in electronic device systems.
They can charge lithium batteries and have functions such as constant current and constant voltage charging, overcurrent protection, voltage protection, and internal temperature monitoring.
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