Chapter 1
INTRODUCTIONS
1. Using the 1550 switching mode power supply
The unit is a Micro-controller based DC power supply with a total supply capability of 108W. By using a
digital + / - keypad operation control, you can set the output voltage and current easily. It is a clean supply
with quiet operation making it ideal for laboratory, work shop or educational applications where work
bench space is limited. The 1550 has a USB charger output, constant current operation, tracking OVP,
floating ground design, small footprint, output on/o push buon and a small form factor.
2. Using the USB power output
The USB output is made to the USB power standard of 5VDC and 0.4A. You can power up or charge your
portables such as an I-Pod, MP3 Player or Cell Phone
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which have USB power connectors for geing dc
power from a PC (Personal Computer).
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NOT ALL THE CELL PHONE CAN BE CHARGED BY THE USB. SOME NEW MODELS REQUIRE HIGHER VOLTAGE THAN THE 5V USB.
PLEASE REFFERENCE THE MANUFACTURES DOCUMENTATION OF THE DEVICE TO BE CONNECTED FOR COMPATABILITY ISSUES.
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