The development direction of power adapter

GiantPCTechnology is a professional power adapter manufacturer. With the continuous improvement of technology, future adapters will require more and more miniaturization and low price, so the controller IC must also develop products that meet these requirements. Specifically: high frequency, low power consumption, high-density installation.

Multifunctional regulators released a 5-terminal regulator that not only generates output voltage, but also has a switch control system reset function. These are power supplies that have been officially put into production as power supplies for microcomputers. Features such as reducing current consumption during preparation or protecting the system in the event of an abnormality in the power supply voltage. The integrated circuit of high-precision reference voltage is composed of a junction voltage regulator circuit based on an energy bandgap reference like a general three-terminal voltage regulator, but the resistance value of the reference circuit is trimmed through the chip to improve the accuracy and temperature drift.

The integrated circuit of high-end voltage stabilizer, which has been serialized in the old form, is a promising product, and is being re-developed to meet market demand. Now, in the form of fixed output voltage, positive voltage and negative voltage are serialized according to each output current (5V～24V, 100mA～1A). low saturation type. Recently, miniaturization has been progressing in various fields, and in order to reduce the number of batteries used, a regulator with a small voltage difference between input and output is required. The minimum voltage difference between this input and output is determined by the saturation voltage of the output of the regulator, which was about 2V in the old form. Various companies have released products that use PNP power transistors in the output section. However, CMOS analog technology was developed while reducing the circuit current in the power adapter, so integrated circuits applying CMOS analog technology are also being developed.

The current situation is that, except for some integrated circuits, the upper limit of the rest of the operating frequency is generally 100KHZ. Therefore, in order to be able to work in the amount of string above 200KHZ, its built-in oscillator, error amplifier; PWM circuit, etc. must achieve broadband. Low power consumption. The circuit current of the controller IC is generally around 10mA. In order to provide this current, an auxiliary power supply circuit must be set up, which is a barrier in terms of cost and space. However, if the circuit current of the IC can be adjusted to 1mA, the loss caused by the step-down resistor R for starting can be ignored. High density installation. In the 494 type integrated circuit, more than 10 CR elements need to be connected to realize multi-output power supply. Since the space it occupies cannot be ignored, there are many examples of using hybrid integration for the entire control circuit. for the same purpose. Control circuits using small planar components as single-board ICs are developing.

The development of power adapters will get better and better. The above is all of today's content. For more information on switching power adapters, please click on the official website of Shishi Real Time.