Power management IC chips mainly manage electric energy conversion, distribution, detection and other power management in electronic equipment systems. Power management semiconductor from the contained devices, the explicit emphasis on the power management integrated circuit (power management IC, referred to as power management chip) position and role. Power management semiconductor includes two parts, namely power management integrated circuit and power management discrete semiconductor device.
There are many types of power management integrated circuits, which can be roughly divided into voltage regulation and interface circuits. Voltage modulator includes linear low voltage drop regulator (i.e. LOD), positive and negative output series circuit, in addition, there is no pulse width modulation (PWM) type switching circuit, etc.
Due to technological progress, the physical size of the digital circuit in the integrated circuit chip is becoming smaller and smaller, so the working power supply is developing towards low voltage, and a series of new voltage regulators emerge at the right moment. Power management interface circuit mainly includes interface driver, motor driver, MOSFET driver and high voltage/high current display driver, etc.
Common eight kinds of power management IC chip classification
Power management discrete semiconductor devices include some traditional power semiconductor devices, which can be divided into two categories, one includes rectifier and thyristor; The other is the triode type, including power bipolar transistor, containing MOS structure power field effect transistor (MOSFET) and insulated gate bipolar transistor (IGBT).
In part because of the proliferation of power management ics, power semiconductors were renamed power management semiconductors. It is precisely because so many integrated circuits (IC) into the power supply field, people are more to power management to call the current stage of power supply technology.
Power management semiconductor in the leading part of the power management IC, can be roughly summarized as the following 8.
1. AC/DC modulation IC. It contains low voltage control circuit and high voltage switching transistor.
2. DC/DC modulation IC. Includes boost/step-down regulators, and charge pumps.
3. power factor control PFC pretuned IC. Provide power input circuit with power factor correction function.
4. pulse modulation or pulse amplitude modulation PWM/ PFM control IC. A pulse frequency modulation and/or pulse width modulation controller for driving external switches.
5. linear modulation IC (such as linear low voltage regulator LDO, etc.). Includes forward and negative regulators, and low voltage drop LDO modulation tubes.
6. battery charging and management IC. These include battery charging, protection and power display ics, as well as “smart” battery ics for battery data communication.
7. Hot swap board control IC (exempt from the influence of inserting or removing 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 productive. The various power management ics are generally associated with a number of 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. Improving efficiency involves two different aspects: on the one hand, the overall efficiency of energy conversion is maintained while reducing the size of equipment; On the other hand, the protection size is unchanged, greatly improving the efficiency.
Low on-state resistance in AC/DC conversions meets the need for more efficient adapters and power supplies in computer and telecommunications applications. In the power circuit design, the general standby energy consumption has been reduced to below 1W, and the power efficiency can be increased to more than 90%. To further reduce the current standby power consumption, new IC manufacturing technologies and breakthroughs in low power circuit design are needed.
Post time: May-20-2022