Adjustable DC-DC Converter has a wide input voltage range from 4.5 V to 42 V is Characterized by an efficiency level of 80 %. The value of the output voltage is set using the potentiometer. Available range: 4 V to 25 V. output Voltage cannot exceed input voltage.
The module has four output:
If SHDN appears low (below 0.3 V), the Converter shuts down and the quiescent current does not exceed 20 µa. To specify a high (above 2.3 V) re-activates the system. The output can be connected on a permanent basis to VIN or leave it off if the power-off mode will not be used.
Connectors respectively signed on the Board. Terminal pitch is 2.54 mm (goldpin connectors). The module can be mounted on the contact plate, to connect with wires or solder in a special printed circuit Board.
The output voltage is set using the potentiometer. Voltage higher than the input will not damage the system. Will appear large fluctuations. So it is not recommended setting the voltage higher than the input.
Oscylogram output voltage. VIN is 5V. VOUT is set above 5V.
Turning the potentiometer clockwise causes the increase of the output voltage.
A graph showing the relationship between pięciem on weekends and the position of the potentiometer for converters 4-25V and a 2.5 to 7.5 V.
Efficiency is defined as the ratio of output power to input power (Power out)/(Power in). This is a very important parameter for portable energy sources (batteries and accumulators), which has a value of working time on one cycle charging. The dependence of the efficiency on the input voltage given in the diagrams below.
Hazardous voltage pulses
When connecting power to the module, can appear dangerous, eclectic short pulses of high amplitude (so-called pins), which can damage the system. Test company, Pololu, it follows that for voltages above 20V studs can have an amplitude in excess of 42 V. to protect against this undesirable phenomenon wlutowanie recommended capacitor value of at least 33 µf, as close as possible to the power pins of the Converter.
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