This USB to 9V DC Boost Cable converts 5V USB power to around 9V for devices with a centre-positive 2.1mm barrel jack, supporting up to 500mA output.
This cable is kinda fascinating - it has an integrated boost converter, so you can plug it into any USB port (from a computer, battery pack, etc) and it will give you a higher DC voltage!
It's a handy way to power 9V powered devices with a centre-positive 2.1mm DC barrel jack from a USB port. We also have a version that provides 12V, and if you just need a passthrough cable, and another one for 5VDC.
These are rated at 500mA output, here's our measurements for various current draws when we set our bench supply to provide a steady 5V voltage.
50mA (9.0V output), 100mA, 90% efficiency
100ma (8.95), 205mA in, 87% efficiency
200ma (8.9V): 410mA in, 86% efficiency
300ma (8.8V): 620mA in, 85% efficiency
500ma (8.8V): 1060mA in, 83% efficiency
So, overall there's a 90% efficiency at low current draw that drops do about 80% at high current use. There's also a 3 mA quiescent current. Note that often times the USB port voltage can drop too, and in addition you may have power losses with any thin or low quality cables with high resistivity!
Features
Integrated boost converter boosts USB power to higher DC voltage
Centre-positive 2.1mm DC barrel jack output
9V output version (12V version also available)
Rated for 500mA maximum output current
90% efficiency at low current draw, approximately 80% at maximum current
3mA quiescent current
Compatible with any standard USB port (computer, battery pack, etc)
Output voltage stability varies with load (8.8V–9.0V across operating range)
5V passthrough cable version available for standard USB power delivery
Specifications
Cable Length: 1.2m
Weight: 35.1g
Package Contents
1x USB to 2.1mm DC Booster Cable - 9V
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