DC-DC Converter. 5-55V, Step Up, LM2557
5-55V Boost DC-DC converter, Step Up
- Input voltage: 3.5 to 35V DC
- Output voltage: 5 to 55V DC
- Input current: 2A (3A max)
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Produce an adjustable output voltage (5 to 55V) with this assembled LM2577 board
Ce This is a boost converter able to produce a higher output voltage from a lower input voltage.
A boost converter is very handy to create the power supply voltage from a Lipo battery or AA batteries.
The advantage of a boost converter is that output voltage is maintained even if the input voltage is lowering with the time... (which is usually the case when the battery or the Lipo is discharging).
The drawback of boost converter is that output current is always lower than input current... so you should take care to not draw too much current on the output to avoids overload/overheat conditions (otherwise the you will be facing to thermal shutdown).
So you cannot use such converter to power up motors!
Next, the characteristics only listed input current (not the output current)! The raison for this is simple: higher is the difference of voltage between the input and the output and lower is the output current avaible for your project.
Step-up, Step-Down... what is this?
Step-Up means "increase" whereas Step-Down means "decrease".
Step-up and step-down are the main characteristics of switching DC/DC regulator. A step-up regulator would be able to raise the output voltage higher than the input voltage. A step-down regulator would be able to reduce the output voltage from an higher voltage input.
A Step-up/Step-Down regulator is able to produce the output voltage from an lower or higher input voltage. This last version is great to maintain your project powered as long as possible (eg: when battery voltage is lowering slowly with the time, even under the logic voltage).
Technical characteristics
- Input voltage: 3.5 to 35V DC
- Output voltage: 5 to 55V DC (adjustable)
- Input current: 2A (max 3A)
- Output current: see the technical datasheet
- Hacheur DC-DC LM2577
- LM2577 datasheet (pdf)
- Size: 43 x 30 x 12mm