pretvarač napona step up 2.9-30V>9-30V, 5A, Pololu 2571
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Pololu is an electronics manufacturer and online retailer serving education, maker, and professional engineering industries with products ranging from sensors and motion control electronics to motors and wheels to complete robots. We strive to offer well-engineered, quality products that enable our customers to take their own projects from idea to reality. Here is why you can rely on Pololu: Good people It takes good people to make good things. Pololu has a world-class team with shared values, which allows us to seek the right way to do things together as well as to help each other improve. That leads directly to better products and a better customer experience. Pololu electronics manufacturing area with multiple pick and place lines. We make our products We manufacture most of the products we sell. Because we control everything from initial design through manufacturing, testing, and packaging, we can offer unique products quickly and economically. We are constantly improving our processes to bring you better parts at lower prices. Thermal image of the top side of the dual VNH5019 motor driver shield during one of our current tests. Quality engineering The engineering of our products differentiates Pololu from the competition. We take a rigorous approach to the details of every product, from design, to validation, to evaluating feedback from customers. Commitment to support At Pololu, we are committed to standing behind our products with a full spectrum of support, from complete documentation (including high-quality pictures, connection diagrams, schematics, datasheets, and example code), to maintaining stock levels so that you can buy the parts you need, to providing same-day shipping service so that you can get your parts as quickly as possible. If you have trouble with a product, you can call, email, or post on our forum and receive help from real engineers. Company background Pololu was founded in 2000 by three students at the Massachusetts Institute of Technology. Our first product was the unique IR beacon system developed for the 6.270 Autonomous Robot Design Competition. The beacons allowed pairs of robots to detect each other, allowing MIT students to give their robots more sophisticated strategies. In 2001, Pololu was incorporated while still operating out of an MIT dorm. Upon graduation of the last founder in 2002, we moved from Massachusetts to Las Vegas, NV for its better climate and lower taxes. Our office has since become the meeting place for the Las Vegas robotics club, which was formed in 2004.
These adjustable boost (step-up) voltage regulators generate higher output voltages from input voltages as low as 2.9 V.
They are switching regulators (also called switched-mode power supplies
(SMPS) or DC-to-DC converters) and have a typical efficiency between 80% to 95%.
The available output current is a function of the input voltage, output voltage, and efficiency
(see the Typical Efficiency and Output Current section below), but the input current can typically be as high as 5 A.
The U3V50x regulator family includes two adjustable-output versions: the U3V50ALV offers an
output range of 4 V to 12 V and the U3V50AHV offers an output range of 9 V to 30 V.
Versions of this regulator are also available with a fixed 5 V, 6 V, 9 V, 12 V, or 24 V output:
The different versions of the board all look very similar, so the bottom silkscreen includes a blank
space where you can add your own distinguishing marks or labels.
The no-load quiescent current depends on the difference between the input and the output voltage.
When the two are close, the quiescent current can be less then a milliamp (e.g. 0.6 mA with 5 V in and 6 V out);
when the two are far apart, it might be in the tens of milliamps (e.g. 24 mA with 3 V in and 24 V out).
This regulator has built-in reverse-voltage protection, over-current protection, thermal shutdown
(which typically activates at 165°C), and an under-voltage lockout that causes the regulator to turn
off when the input voltage is below 2.5 V (typical).
Input voltage: 2.9 V to VOUT
Output adjustable from 4 V to 12 V or 9 V to 30 V
5 A switch allows for input currents up to 5 A
Integrated reverse-voltage protection, over-current protection, over-temperature
shutoff, and under-voltage lockout
Typical efficiency of 80% to 95%, depending on input voltage, output voltage, and load
Compact size: 1.9” × 0.6” × 0.41” (48 × 15 × 10.5 mm)
Two mounting holes for #2 or M2 screws
The input voltage, VIN, must be at least 2.9 V and should not exceed the output voltage, VOUT.
(If VIN is higher than VOUT, the higher input voltage will show up on the output, which is potentially
dangerous for your connected load and could also damage the regulator.)
The regulator is enabled by default: a 100 kOhm pull-up resistor on the board connects the ENABLE pin to reverse-protected VIN.
The ENABLE pin can be driven low (under 0.7 V) to put the board into a low-power state.
The quiescent current draw in this sleep mode is dominated by the current
in the pull-up resistor from ENABLE to VIN and by the reverse-voltage protection circuit, which will
draw between 10 µA and 20 µA per volt on VIN when ENABLE is held low.
If you do not need this feature, you should leave the ENABLE pin disconnected. Note that like most boost regulators, the
input power will pass through to the output when the board is disabled, so the ENABLE pin cannot be used to turn off power to the load.