Communication DC Power Supply Classification

What is Communication DC Power Supply Classification? And what type of Communication DC Power Supply?
Welcome to Get a Quote: Email: export@bestpluspower.com

Power supply classification: It can be subdivided into high-frequency switching power supply, inverter power supply, AC stabilized power supply, DC stabilized power supply, DC/DC power supply, stabilized power supply, communication power supply, module power supply, variable frequency power supply, UPS power supply, EPS emergency power supply, purification power supply, PC power supply, rectifier power supply, customized power supply, heating power supply, welding power supply/arc power supply, electroplating power supply, network power supply, electric operation power supply, adapter power supply, linear power supply, power controller/driver, power power supply, Other ordinary power inverter power supply, parameter power supply, voltage regulating power supply, transformer power supply.
2. There are many types of power ICs, and their common features are:
(1) The working voltage is low; the general working voltage is 3.0～3.6V. Some have a lower working voltage, such as 2.0, 2.5, 2.7V, etc.; some have a working voltage of 5V, and there are a few special-purpose voltage sources of 12V or 28V.
(2) The working current is not large; it ranges from a few milliamps to a few amperes. However, since the working current of most embedded electronic products is less than 300mA, the 30-300mA power supply IC accounts for a large proportion in variety and quantity.
Welcome to Get a Quote: Email: export@bestpluspower.com
(3) The package size is small; the portable products developed in recent years all use SMD devices, power IC is no exception, mainly SO package, SOT-23 package, μMAX package, the smallest package size SC-70 and the latest SMD Packaging, etc., make the space occupied by the power supply smaller and smaller.
(4) Complete protection measures; The new power IC has complete protection measures, including: output overcurrent limit, overheat protection, short circuit protection and battery polarity reverse protection, making the power supply safe and reliable, and not easy to damage.
(5) Low power consumption and power-off function; The quiescent current of the new power IC is relatively small, generally tens of μA to hundreds of μA. The quiescent current of individual micro-power linear regulators is only 1.1μA. In addition, many power supply ICs have the function of turning off the power control terminal (controlled by level), and the power consumption of the IC itself is about 1μA when the power is turned off. Because it can make part of the circuit inoperative, it can greatly save power. For example, on a wireless communication device, the receiving circuit can be turned off in the sending state; the display circuit can be turned off when the signal is not received.
(6) There is a power supply working status signal output; many portable electronic products have single-chip microcomputers. When the output voltage drops by a certain percentage due to overheating or low battery voltage, the power supply IC has a power supply working status signal output to the single-chip microcomputer. Reset. This signal can also be used to indicate the working status of the power supply (when the battery voltage is low, there is an LED display).
Welcome to Get a Quote: Email: export@bestpluspower.com
(7) The output voltage accuracy is high; the general output voltage accuracy is between ±2～4%, and there are many new power ICs with accuracy up to ±0.5～±1%; and the output voltage temperature coefficient is small, generally ± 0.3～±0.5mV/℃, and some can reach the level of ±0.1mV/℃. The linear adjustment rate is generally 0.05% to 0.1%/V, and some can reach 0.01%/V; the load adjustment rate is generally 0.3 to 0.5%/mA, and some can reach 0.01%/mA.
(8) New combined power supply IC; boost DC/DC converter has high efficiency but large ripple and noise voltage, low dropout linear regulator has low efficiency but minimum noise, a dual output power supply IC composed of the combination of the two Can better solve the problem of efficiency and noise. For example, the digital circuit part adopts the step-up DC/DC converter power supply and the noise-sensitive circuit adopts the LDO power supply. This kind of power IC has MAX710/711, MAX1705/1706 and so on. Another example is the charge pump + LDO composition, which outputs a regulated charge pump power supply IC, such as MAX868, which can output 0～-2VIN adjustable and stable voltage and can provide 30mA current; MAX1673 regulated charge pump power supply IC Output the same negative voltage as VIN, and the output current can reach 125mA.
Types and selection of DC power supply
DC power supplies can be divided into chemical power supplies, linear stabilized power supplies, and switch-type stabilized power supplies according to habits. They also have various types:
Chemical power supply: The dry batteries, lead-acid batteries, nickel-cadmium, nickel-metal hydride, and lithium-ion batteries that we usually use all belong to this category, each with its own advantages and disadvantages. With the development of science and technology, intelligent batteries have been produced; in terms of rechargeable battery materials, American researchers have discovered an iodide of manganese, which can be used to produce cheap, compact, and long discharge time, which can be maintained after multiple charges.
Welcome to Get a Quote: Email: export@bestpluspower.com
Linear stabilized power supply: The linear stabilized power supply has a common feature that its power device regulator tube works in the linear region, and the output is stabilized by the voltage drop between the regulator tubes. Due to the large static loss of the adjustment tube, a large radiator needs to be installed to dissipate heat. Moreover, since the transformer works on the power frequency (50Hz), the weight is relatively large. The advantages of this type of power supply are high stability, small ripple, high reliability, easy to make a multi-channel, and continuously adjustable output. The disadvantage is that it is large, bulky, and relatively low in efficiency. There are many kinds of stable power supplies of this kind. From the output nature, they can be divided into regulated power supply and steady current power supply, and regulated and steady current (bistable) power supply that integrates steady voltage and steady current. In terms of output value, it can be divided into fixed-point output power supply, band switch adjustment type and potentiometer continuously adjustable type. From the output indication can be divided into pointer indication type and digital display type and so on.
Switching DC stabilized power supply: A type of stable power supply that is different from linear stabilized power supply is switching DC stabilized power supply. Its circuit types mainly include single-ended flyback, single-ended forward, half-bridge, and push-pull. And full bridge. The fundamental difference between it and the linear power supply is that its transformer does not work at power frequency but at tens of kilohertz to several megahertz. The functional tube does not work in the saturation and cut-off region, that is, the switching state; the switching power supply is named after it. The advantages of switching power supplies are small size, light weight, stable and reliable; disadvantages compared with linear power supplies, the ripple is larger (generally ≤1%VO(PP), good ones can be more than ten mV(PP) or less) . Its power can range from several watts to several kilowatts. The price ranges from 3 yuan to more than 100,000 yuan per watt. The following is a general custom classification and introduction of several switching power supplies:
① AC/DC power supply; This type of power supply is also called primary power supply. It obtains energy from the power grid, and obtains a DC high voltage after high voltage rectification and filtering, for the DC/DC converter to obtain one or several stable DC voltages and power at the output end. Products from several watts to several kilowatts are available for different occasions. There are many specifications and models of this type of product, and the primary power supply (AC220 input, DC48V or 24V output) in the communication power supply according to the needs of users also belongs to this category.
Welcome to Get a Quote: Email: export@bestpluspower.com
②, DC/DC power supply; also called secondary power supply in the communication system, it is a DC input voltage provided by a primary power supply or a DC battery pack, and one or several DC voltages are obtained at the output terminal after DC/DC conversion.
③, Communication power supply: The communication power supply is essentially a DC/DC converter type power supply, but it is generally powered by DC -48V or -24V, and a backup battery is used as the backup of the DC power supply to convert the DC power supply voltage into the work of the circuit Voltage. Generally, it is divided into three types: central power supply, hierarchical power supply, and single-board power supply. The latter has the highest reliability.
④, radio power supply; radio power input AC220V/110V, output DC13.8V, the power is determined by the power of the power supplied, several amperes and hundreds of amperes are available. In order to prevent the AC power grid from affecting the work of the radio, a battery pack is required As a backup, this type of power supply not only outputs a 13.8V DC voltage, but also has an automatic conversion function for battery charging.
⑤, Module power supply; With the rapid development of science and technology, the requirements for power supply reliability and capacity/volume ratio are getting higher and higher. Module power supply shows more and more advantages. It has high working frequency, small size, high reliability, and convenience. Installation and combination expansion, so it is more and more widely used.
Welcome to Get a Quote: Email: export@bestpluspower.com
Best Plus Power is a manufacturer and provider of dependable high efficiency power electronics, energy conversion systems and power supplies. Best Plus Power solutions include a complete line of high-efficiency rectifiers, inverters and DC power systems for mission critical applications. With over 10-Years experiences supporting customers in more than 60 countries, Best Plus Power is focused on bringing reliable power solutions to customers across all applications and environments, which specialize in Battery Chargers, Power Inverters, Power Supplies / Rectifiers, DC / DC Converters, Frequency Converters, and other Power supplies.
Email: export@bestpluspower.com
Website: www.bestpluspower.com