Switch the power chip is an electric converter used to convert the power to a source suitable for various applications. It converts direct current voltage from input sources to output voltage by controlling the conductivity and closing of switches, using high-frequency pulse width adjustment techniques. Switching power chips have the advantage of being efficient, small size, light weight, low cost and are therefore widely used in electronic equipment. Common switch chips are u6773, u6215, u6315, u6108s, u321, u6119, etc。
The operation of the switch's power chip is primarily to regulate the output voltage and currents by controlling the breakout of the switch. Switching power chips typically consist of input circuits, control circuits, switches and output circuits。
In the switch source chip, the input circuit function is to filtrate the voltage provided by the external power source into a direct current voltage. Control of circuits is the core part of the switch, which controls the output voltage and currents by regulating the break time of the switch, depending on the input voltage and output voltage. The function of a switch tube is to control the break-up of the power source, where the energy is stored in the transformer when the switch is activated, and when the switch is broken, the transformer releases the energy to output the current voltage by filtration circuit. The function of the output circuit is to stabilize and filter the output voltage to ensure the stability of the output voltage and reduce the texture。
Switching power chips have the advantage of being efficient, small size, light weight, low cost and are therefore widely used in electronic equipment. As science and technology develop, the performance of switch chips is increasing and applications are expanding。
Here are a few of the most common switch source chips:
Lm2596: lm2596 is a pressure-relief switch pressurer chip with efficient and low power. It is capable of steadily reducing input voltage to the default output voltage and is widely used in such areas as battery charging, led-driven and embedded systems。
The lm2596 series is a single-format integrated circuit that provides all effective functions to the pressure-relief switch stabilizer, is capable of driving the load of 3a and has excellent circuits and load regulation capabilities. These devices provide 3. 3v, 5v, 12v fixed output voltage and adjustable output voltage versions. Such pressure stabilizers require not only a small number of external components, but also easy to use, as well as internal frequency compensation and fixed frequency oscillators。
The lm2596 series operates at a switch frequency of 150 khz, so the filter components used are smaller in size than those required for lower frequency switches. The standard 5 quote to-220 envelopes can be used with a variety of curvature options, and 5 draw foot to-263 surfaces can be packed。
A number of different producers provide standard electrons that can be matched with lm2596. This feature greatly simplifys the design of switch mode power。
Other features include the output voltage tolerance difference of 4% and the frequency tolerance difference of the oscillator of 15% under rated input voltage and output load. It also has an external shut-down function, with a typical stand-by current value of 80 μa. Self-protective functions include a two-stage frequency reduction of current limits for output switches and a fully protected heat-off function in case of failure。
Lm317: lm317 is a classic modifiable linear pressurizer chip that is widely used in low-pressure differential steady power source design. It has high pressure accuracy and load adjustment capabilities and applies to applications that require stable output voltage, such as electronic instruments, communication equipment and audio amplifiers。
Lm317 is a truncable 3-end positive voltage pressure stabilizer capable of providing currents exceeding 1. 5a within the output voltage range of 1. 25v to 37v. It needs only two external resisters to set the output voltage. This device has a typical linear adjustment rate of 0. 01% and a typical load adjustment rate of 0. 1%. It includes electrical current limits, heat overload protection and safe workplace protection functions. An overload protection function works even if the “reconciliation” end is disconnected。
Tps series: tps series is a high performance switch management chip produced by texas instruments. The series includes various models, such as tps 62130, tps 54331 and tps 63020, which are used for different power surge and application needs. The tps chips, which are characterized by efficient, low-static power consumption and rapid dynamic response, are suitable for areas such as mobile equipment, industrial automation and automobile electronics。
Lt series: the lt series is a series of high-performance switch management chips launched by linear technology (now part of adi). They have excellent pressure accuracy, efficiency and low noise properties and are widely used in precision measurements, medical equipment and aerospace applications。
