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DNA-20 Info

Evolv DNA 20D

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The DNA 20D is a power regulated digital switch-mode DC-DC converter for personal vaporizers. It features a small OLED display, analog or digital user controls, onboard buttons and synchronous rectification for maximum battery life and minimal heat generation.

Minimum Typical Max
Output Power 7 Watts 20 Watts
Output Voltage 4 Volts 8.3 Volts
Output Current 6 Amps
Atomizer Resistance 1.0 Ohms 2.5 Ohms 3.3 Ohms
Input Voltage 3.2 Volts 3.7 Volts 4.3 Volts
Input Current 1.5 Amps 4.0 Amps 7 Amps
Screen On Current 25mA
Quiescent Current 1 mA
Power Down Current 22 uA
Efficiency 93%
Weight 6g
Footprint .65” x 1.30”
Thickness .35”
Screen size .69” OLED

Display

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The DNA 20D has a small .69” diagonal blue OLED screen. The screen is attached to the main board by a flexible cable, allowing freedom in the design of your device. Please use caution when handling the screen and design the device so that the cable will be secured or strain relieved in operation. The normal and special operating modes shown on the display are discussed below.

Normal Operation

Watt setting: The power level currently set on the DNA 20D.

 

Battery indicator: The current state of charge of the battery.

 

Volts display: The current or most recent output voltage being supplied to the atomizer.

 

Ohms display: The resistance of the atomizer attached to the device. This is measured only when the unit is supplying power to the atomizer. At other times, it shows the most recent measurement.

Other modes

Locked mode: Pressing the fire button five times with less than .7 seconds between presses will cause the device to enter Locked mode. In Locked mode, the device will not fire and the output power will not adjust accidentally. While in Locked mode, the screen will be off, except that pressing a button will show “Locked, Click 5X”. To exit Locked mode, press the fire button 5 times.

 

Stealth mode: While locked, pressing the fire and down buttons simultaneously for five seconds will switch to stealth mode. In this mode the display is off. It will still show error messages and the “Locked, Click 5X” advisory. To switch back to normal display mode, from locked mode hold down the fire and down buttons simultaneously for 5 seconds. This setting is stored to internal flash memory, and remains if power is removed.

 

Right Mode and Left Mode: While locked, holding the fire and up buttons simultaneously for 5 seconds flips the display. This allows for maximum flexibility in designing the mod, as well as accommodating left handed vapers. This setting is stored to internal flash memory, and remains if power is removed. Please note that if using a potentiometer instead of a button, this option is not available. However, it can be set before soldering the potentiometer on during manufacture.

Error Messages

The DNA 20 will indicate a variety of error states.

 

Check Atomizer: The DNA does not detect an atomizer, or the atomizer has shorted out.

 

Shorted: The atomizer or wiring are short circuited.

 

Check Battery: The battery is below 3.1 volts. It probably needs to be charged.

 

Weak Battery: The battery sags excessively when firing. This typically means the user is not using a high rate battery, or the battery is old and degraded. It can also mean the battery is not making good contact.

 

Too Hot: The DNA 20D has onboard temperature sensing. It will shut down and display this message if the internal board temperature becomes excessive.

 

Too low power setting: The DNA 20D puts out a minimum of 4 volts. With low power settings (7 to 8 watts) and low resistance atomizers (below 2 ohms) the DNA will sometimes be unable to provide a low enough power output to be power regulating. If this is the case, the Ohms display will be flashing. The device will still operate.

Auto power down

The screen will be at full brightness while firing. After 15 seconds with no button presses, the screen will dim. 4 minutes after the last button press, the screen will fade out and the device will go to sleep mode. Pressing any button will turn the device and display back on.

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