Yangzhou Kaihong Power Technology Co., Ltd. (Yangzhou Headquarters)
Sales phone: 0514-87979963
Sales Straight 1: 13773587351
Sales line 2: 18932373905
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Company address: Xi'an Jiaotong University Pioneer Park, East Wuzhou Road, Yangzhou
AC and DC power management semiconductors clearly emphasize the position and role of AC and DC power management integrated circuits (DC power management ICs, referred to as DC power management chips) from the included components. The DC power management semiconductor includes two parts, namely a DC power management integrated circuit and a DC power management discrete semiconductor device.
AC and DC power management integrated circuits include many types, which are roughly divided into voltage regulation and interface circuits. The voltage conditioner includes a linear low-dropout regulator (ie, LDO), 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 digital circuits in integrated circuit chips is getting smaller and smaller, so the working DC power supply is developing to a low voltage, and a series of new voltage regulators have emerged. Interface circuits for DC power management include interface drivers, motor drivers, power field effect transistor (MOSFET) drivers, and high-voltage / high-current display drivers.
DC 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 a triode type, which includes power bipolar transistors, and contains a MOS structure Power field effect transistor (MOSFET) and insulated gate bipolar transistor (IGBT).
To some extent, it is because of the large number of developments in DC power management ICs that power semiconductors are renamed DC power management semiconductors. It is precisely because so many integrated circuits (ICs) have entered the field of DC power that people more often refer to DC power technology at this stage as DC power management.
The leading part of the DC power management semiconductor is the DC power management IC, which can be roughly classified into the following eight types.
1. AC / DC modulation IC. Contains low voltage control circuit and high voltage switching transistor.
2. DC / DC modulation IC. Includes step-up / step-down regulators and charge pumps.
3. Power factor control PFC pre-modulation IC. Provide DC power input circuit with power factor correction function.
4, pulse modulation or pulse amplitude modulation PWM / PFM control IC. Controller for pulse frequency modulation and / or pulse width modulation for driving external switches.
5. Linear modulation IC (such as linear low-dropout regulator LDO, etc.). Includes positive and negative regulators, and low-dropout LDO modulation tubes.
6. Battery charging and management IC. Includes battery charging, protection, and power display ICs, and "smart" battery ICs for battery data communication.
7. Hot-plug board control IC (to avoid the impact of inserting or removing another interface from the working system).
8. Switching function ic of MOSFET or IGBT.
Among these AC and DC power management ICs, voltage regulator ICs are the fastest growing and most productive part. Various DC power management ICs are basically associated with some related applications, so for different applications, more types of devices can be listed.
The technical trends of AC and DC power management are high 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, and at the same time, we want to reduce the size of the equipment; on the other hand, we want to protect the size and increase the efficiency.
In AC / DC power supply (AC / DC) conversion, low on-state resistance meets the needs of more efficient adapters and DC power supplies in computer and telecommunications applications. In terms of AC and DC power supply circuit design, the general standby power consumption has dropped below 1W, and the DC power supply efficiency can be increased to more than 90%. To further reduce the existing standby energy consumption, new IC manufacturing process technology and breakthroughs in low-power circuit design are required.
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