Power adapter manufacturer: integrated manostat characteristics and types of _

Power adapter manufacturer: integrated characteristics and types of regulated power supply of 2020-880 07 - 29 15:49:37 so-called integrated voltage regulator, will not be stable dc voltage into a stable dc voltage of the integrated circuit, with a discrete component of regulated power supply, has big output power, has a wide adaptability advantages. Integrated voltage regulator has simple circuit, voltage stability, small ripple, interference has the advantages of small, therefore has been widely used. Three small power voltage stabilizing power adapter to the most common type series voltage regulator application. Integrated voltage regulator generally divided into: linear integrated voltage regulator and switch integrated voltage regulator, linear integrated voltage regulator is divided into low pressure differential integrated voltage regulator and general differential pressure integrated voltage regulator; Switch integrated voltage regulator is divided into step-down integrated voltage regulator, booster integrated voltage regulator and input and output polarity opposite integrated voltage regulator commonly used three-terminal voltage regulator integrated voltage regulator to form a regulated power supply adapter required few peripheral components, circuit internal and over-current, overheating and tube protection circuit. Circuit is commonly used in the integration of the stabilizer are mainly 78 series, the series of 79 xx, xx can assemble into a voltage stabilizer, precision voltage reference integrated voltage regulator, etc. Sometimes behind the number 78 or 79 and a M or L, such as 78 M12 or 79124, used to distinguish the output current and packaging forms, etc. Plastic package of regulating circuit has the advantages of easy installation, low price, so a few more. Series 79, in addition to the output voltage is negative, leads to arrange different feet, naming method, shape are the same as the 78 series and so on. The characteristics of the integrated voltage regulator and type 1) The characteristics of the integrated voltage regulator integrated voltage regulator, is the use of integrated circuit technology will be stable in the circuit components are made in a semiconductor chip or insulating substrate, are integrated. Linear integrated voltage regulator internal structure is linear series voltage regulator. With the development of integrated circuit technology, especially the development of large scale integrated circuit, electronic equipment, quality, volume, power consumption is more and more small, so the request to the electronic equipment power supply dc power adapter is miniaturization. 2 dc linear voltage regulator and regulated power supply adapter power adapter technology integration than regulating circuit composed of discrete components, the former small volume, low cost, easy to use, its performance in the general case can meet the requirements, so widely used: 2) Integrated voltage regulator commonly used several types of divided into two categories, linear integrated voltage regulator and switch integrated voltage regulator, linear integrated voltage regulator is divided into low pressure differential integrated voltage regulator and general differential pressure integrated voltage regulator; Switch integrated voltage regulator is divided into step-down integrated voltage regulator, booster integrated voltage regulator and the input and output polarity opposite integrated voltage regulator. ( 1) Multiterminal adjustable integrated voltage regulator. This requires an external voltage stabilizer and the protection circuit component, it is more, the external end of easy to adapt to different usage. Its output voltage is adjustable to meet the requirements of different output voltage. At present domestic WB712, WB724, WA705 - 724, 5 C11, SG14, W601, W611, etc. ( 2) Three side stationary integrated voltage regulator. This type of voltage stabilizer is the sampling resistor, capacitance compensation, protection circuit and power adjustment of pipe are integrated on the same chip, make whole integrated circuit block only three terminal input, output, and the public, it is very convenient to use, so get a wide range of applications. Its disadvantage is that the output voltage is fixed, so you have to produce all kinds of output voltage, current specifications of the products. 7800 series integrated voltage regulator is a common fixed output voltage is the integration of the stabilizer, the 7900 series integrated voltage regulator is a common fixed negative output voltage of the integrated voltage regulator. ( 3) Three-terminal adjustable integrated voltage regulator. It has input, output, and adjust the three terminals. Only external two resistance can obtain all kinds of output voltage. Such as, CW117 for common three-terminal adjustable output is integrated voltage regulator, CW137 for common three-terminal adjustable negative integrated voltage regulator output. ( 4) Output positive and negative pressure at the same time the integration of the stabilizer such as operational amplifier need supply positive pressure and need to provide a negative pressure at the same time, usually with a positive voltage stabilizer and a negative voltage stabilizer can output positive and negative voltage of the power adapter, can also use a can output at the same time the integration of positive and negative voltage stabilizer to form a regulated power supply adapter, such as MC1568. CW78HOO ( SA ) CW79HOO ( 5A ) The appearance of fixed output integrated voltage regulator and pin is arranged.