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Classification of power management ICs and inventory of global IC manufacturers
In all electronic equipment and products, there is no shortage of "figures" of power management ICs. With the common high-speed development of digital high-speed IC technology and chip manufacturing technology, the role of high-performance power IC "helping out" is becoming more and more important. The ever-changing electronic product applications and the rise of environmental protection, green and energy-saving requirements have also put forward higher requirements for power ICs, which has led to the demand for a new generation of high-integration, high-performance and high-energy-efficiency power management ICs, and has become an eternal demand for power management IC manufacturers mission.
Power management semiconductors clearly emphasize the position and function of power management integrated circuits (power management ICs, referred to as power management chips) in terms of the devices included. Power management semiconductors include two parts, namely power management integrated circuits and power management discrete semiconductor devices.
Power management integrated circuits include many types, which are roughly divided into voltage adjustment and interface circuits. The voltage regulator includes a linear low-drop voltage regulator (that is, LOD), and a series of positive and negative output circuits. In addition, there is no pulse width modulation (PWM) switching circuit.
Due to technological progress, the physical size of the digital circuit in the integrated circuit chip is getting smaller and smaller, so the working power supply is developing towards low voltage, and a series of new voltage regulators have emerged as the times require. Interface circuits for power management mainly include interface drivers, motor drivers, power field-effect transistor (MOSFET) drivers, and high-voltage/high-current display drivers.
Power management discrete semiconductor devices include some traditional power semiconductor devices, which can be divided into two categories, one includes rectifiers and thyristors; the other is triode type, including power bipolar transistors, including MOS structure power field effect transistor (MOSFET) and insulated gate bipolar transistor (IGBT), etc.
To some extent, it is precisely because of the massive development of power management ICs that power semiconductors are renamed power management semiconductors. It is precisely because so many integrated circuits (IC) have entered the field of power supply that people call the current power supply technology more with power management.
Classification of Power Management IC
The dominant part of power management semiconductors is the power management IC, which can be roughly classified into the following 8 types.
- AC/DC modulation IC. Contains low voltage control circuit and high voltage switching transistor.
- DC/DC modulation IC. Includes a step-up/buck regulator, and a charge pump.
- Power factor control PFC pre-modulation IC. Provide a power input circuit with power factor correction function.
- Pulse modulation or pulse amplitude modulation PWM/PFM control IC. are pulse frequency modulation and/or pulse width modulation controllers for driving external switches.
- Linear modulation IC (such as linear low-dropout voltage regulator LDO, etc.). Includes positive and negative regulators, as well as low-dropout LDO modulators.
- Battery charging and management IC. Including battery charging, protection and power display IC, and "smart" battery IC for battery data communication.
- Hot-swap board control IC (exempt from the impact of plugging or unplugging another interface from the working system).
- Switch function IC of MOSFET or IGBT.
Among these power management ICs, voltage regulation ICs are the fastest growing and largest volume segment. Various power management ICs are basically associated with some related applications, so more types of devices can be listed for different applications. The technical trend of power management is high efficiency, low power consumption, and intelligence.
