Essay on Volt and Potentiometer w Potentiometer

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Evolv DNA 12
12 Watt variable power module
Preliminary Datasheet

The DNA 12 is a power regulated digital switch-mode DC-DC converter for personal vaporizers.

Output Power
Output Voltage
Output Current
Atomizer Resistance
Input Voltage
Input Current
Quiescent Current
Efficiency
Weight
Footprint
Thickness

Minimum
5 Watts

Typical

1.1 Ohms
3.2 Volts
1.5 Amps
120 uA

2.5 Ohms
3.7 Volts
3.0 Amps
220uA
87%
5g
.65” x .85”
.32”

Max
12 Watts
6.0 Volts
3.5 Amps
3.3 Ohms
4.3 Volts
4.5 Amps
350uA

Pinout
The DNA 12 requires an external switch to activate and a potentiometer to set the power level.
Connections are also provided for battery input, optional input from an accessory charger and output to the atomizer.

Pin Number
1
2
3
4
5
6
7
8
9
10
11

Pin Name
Switch Switch +
Charger Charger +
Battery Battery +
Potentiometer +
Potentiometer W
Potentiometer Output +
Output -

Function
Negative side of the activation switch.
Positive side of the activation switch.
Negative side of the charger board connection. Optional.
Positive side of the charger board connection. Optional.
Negative side of the battery.
Positive side of the battery.
Positive side of the potentiometer.
Wiper (center pin) of the potentiometer.
Negative side of the potentiometer.
Positive side of the power output. Connect to atomizer.
Negative side of the power output. Connect to atomizer.

Mechanical Dimensions

The mounting holes for the DNA 12 are .100” pitch. It can be wired in directly using soldered connections, or socketed with standard .1” hardware.
In a metal design, it is advantageous to glue the converter’s metal heat spreader to the case with a thermal glue such as Loctite 383. A wood or plastic mod should be mounted with the heat spreader away from the case. The regulator will also fit inside most round designs.

Recommended wire sizes
Battery
Output
Charger
Potentiometer
Switch

Minimum size
22 gauge
24 gauge
26 gauge
28 gauge
28 gauge

Recommended size
20 gauge
20 gauge
24 gauge
24 gauge
24 gauge

Maximum size
20 gauge
20 gauge
20 gauge
20 gauge
20 gauge

It is important to use appropriately sized wire when using the DNA. Too small wire will not perform well, and significantly undersized wire can burn out.

External component recommendations
The DNA 12 is a self-contained power regulator which requires external components for user interface. A potentiometer is used to set the desired power level, and normally open switch or button is used to activate the device.
Switch:
Use a momentary on, normally open type switch or button. A standard pushbutton switch is appropriate. The switch is a logic function – all power switching is handled with transistors inside the
DNA module, so the switch does not need to be rated for power. A waterproof or processed sealed switch is recommended.
Potentiometer:
Use a standard linear taper potentiometer. Resistances between 1k and 10k ohms are recommended. To reverse the direction of turn for adjustment, reverse the…