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Showing posts with label 0. Show all posts
Saturday, October 4, 2014
5V Switching Regulator using LM2575 5 0
This circuit of +5 V switching power supply uses LM2575-5.0. You can make the stable voltage by using Terminal 3 and LM317 regulator. However, due to the current electrical output and electrical current is introduced it, about the difference between electrical power input (x Input voltage power input) and output (voltage output x output current) is consumed as heat with the regulator. Because it is, the efficiency is not good. In the event that the switching regulator that only inputs the electrical energy needed to produce the input for the switching operation. Because it is, there is little power to consume with the regulator and is efficient.
DC to DC step down voltage regulator. Wide input voltage 8Vdc to 40Vdc.
The controller switching stage such attacks may be the voltage that is higher than the input voltage.
IC LM2575
The LM2575 series of regulators are monolithic integrated circuits that provide all the active functions of a step down (money) switching regulator capable of driving a 1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V and adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed frequency oscillator.
The LM2575 series offers a high-performance replacement for popular three-terminal linear regulators. Substantially reduced the size of the heatsink, and in many cases no heat sink is required.
A standard series of inductors optimized for use with the LM2575 are available from several manufacturers. This feature greatly simplifies the design of switching power supplies.
Other features include a guarantee of ± 4% output voltage at the input voltages within specific conditions and output load, and ± 10% in the oscillator frequency. External stop is included, with 50 mA (typical) standby current. The output switch includes cycle-by-cycle current limiting, thermal shutdown and full protection for the failure.
DC to DC step down voltage regulator. Wide input voltage 8Vdc to 40Vdc.
- LM2575-3.3 (3.3Vdc output)
- LM2575-5.0 (5Vdc output)
- LM2575-12 (12Vdc output)
- LM2575-15 (15Vdc output)
- LM2575-ADJ (1.23Vdc to 37Vdc output)
The controller switching stage such attacks may be the voltage that is higher than the input voltage.
IC LM2575
The LM2575 series of regulators are monolithic integrated circuits that provide all the active functions of a step down (money) switching regulator capable of driving a 1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V and adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed frequency oscillator.
The LM2575 series offers a high-performance replacement for popular three-terminal linear regulators. Substantially reduced the size of the heatsink, and in many cases no heat sink is required.
A standard series of inductors optimized for use with the LM2575 are available from several manufacturers. This feature greatly simplifies the design of switching power supplies.
Other features include a guarantee of ± 4% output voltage at the input voltages within specific conditions and output load, and ± 10% in the oscillator frequency. External stop is included, with 50 mA (typical) standby current. The output switch includes cycle-by-cycle current limiting, thermal shutdown and full protection for the failure.
Sunday, September 14, 2014
Voltage Converter 0 5v to 6v Wiring diagram Schematic
This is a Simple Voltage Converter 0.5v to 6v Circuit Diagram. Conventional silicon transistors just cant operate at voltages less than about 0.7v. Old germanium transistors could be used, but those are hard to find these days and most are rather large in size. Some new n-channel MOSFET devices with very low gate-source threshold voltage can operate at quite low voltages. Ive been experimenting with various devices and came up with one electronic schema (shown below), which demonstrates how to boost the low voltage from a single solar cell to a higher voltage.
Voltage Converter 0.5v to 6v Circuit Diagram
The key component in the schema below is a cheap single logic device from Texas Instruments. It turns out that TIs 74AUC family of parts can work down to about 0.45 volts. I tried one of their single schmitt trigger parts and found I was able to make on oscillator function nicely at 0.5 volts. I then used a charge pump technique and a cheap NPN transistor to form a low power flyback converter.
This hobby schema can produce about 6 volts at the output from a 0.5v input. The idea is to use this boost schema to generate the higher starting voltage needed by a much more powerful DC to DC converter. Once started, part of the converters output could then be feed back to the input, to sustain converter operation. This is known as a "bootstrap" technique. In the future, I hope to post a schema which can supply several watts of power from a 0.5v input voltage. This would be ideal for charging a battery using power from a single large solar cell or several smaller cells wired in parallel.
Drown By : Dave Jhonson
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