Power supply IC refers to the pulse width control integration of switching power supply, and the power supply relies on it to adjust the stability of output voltage and current.
In all electronic devices and products, there is no shortage of power management ICs. With the rapid development of digital high-speed IC technology and chip manufacturing process technology, the role of high-performance power supply IC "help" is becoming more and more important. The ever-changing electronic product applications and the rise of environmental protection, green and energy-saving demand have also put forward higher requirements for power supply ICs, giving birth to the demand for a new generation of highly integrated, high-performance and energy-efficient power management ICs, which has also become the eternal mission of power management IC manufacturers.
Power management semiconductors clearly emphasize the location and role of power management integrated circuits (power management ICs, referred to as power management chips) from the devices they contain. Power management semiconductors include two parts, power management integrated circuits and power management discrete semiconductor devices.
Power management integrated circuits include many categories, which are roughly divided into voltage regulation and interface circuits. The voltage wither includes a linear low-dropout regulator (LOD), a series of positive and negative output circuits, and a switching circuit without pulse-width modulation (PWM). Due to technological progress, the physical size of digital circuits in integrated circuit chips is getting smaller and smaller, so the working power supply develops to low voltage, and a series of new voltage regulators have emerged. The 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 type is the transistor type, which contains power bipolar transistors, power field-effect transistors (MOSFETs) containing MOS structures and insulated-gate bipolar transistors (IGBTs).
To some extent, it is precisely because of the large number of developments in power management ICs that power semiconductors have been renamed power management semiconductors. It is precisely because so many integrated circuits (ICs) have entered the field of power supply that people call the current stage of power technology more by power management.
The leading part of the power management semiconductor book is power management ICs, which can be roughly summarized into the following eight types.
1. AC/DC modulation IC. Includes low-voltage control circuitry and high-voltage switching transistor.
2. DC/DC modulation IC. Includes a boost/buck regulator and a charge pump.
3. Power factor control PFC premodulation IC. Provides a power input circuit with power factor correction.
4. Pulse modulation or pulse amplitude modulation PWM/PFM control IC. Pulse frequency modulation and/or pulse width modulation controllers for driving external switches.
5. Linear modulation IC (such as linear low-dropout regulator LDO, etc.). Includes positive and negative regulators, as well as low-dropout LDO modulation tubes.
6. Battery charging and management IC. These include battery charging, protection, and power display ICs, as well as "smart" battery ICs that enable battery data communication.
7. Hot-swap board control IC (exempt from the influence of inserting or unplugging another interface from the working system).
8. MOSFET or IGBT switching function IC.
Among these power management ICs, voltage regulation ICs are the fastest growing and most prolific part. The various power management ICs are basically linked to 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.
