This specification defines the performance characteristics for a class Ⅱ adapter, single-phase 12.0 watts. Single output level power supply.
◆ Simple design philosophy.
◆ Reliability level of 50K hours MTBF @ 25° C (rated input voltage and using the Telcordia SR-332 issue 3 method).
◆ DC output voltage must be Safe Extra Low Voltage (SELV) & Limited Power as defined by IEC62368-1.
◆ The maximum room ambient temperature (Tmra), as mentioned in clause B.1.6 and B.2.6 of IEC62368-1, for the external power supply is 40°C.
◆ Cooling: natural convection.
Input & Output Requirements
|Rated input voltage
|Rated input frequency
|50/60Hz +/- 3Hz
|Rated input current
|Power consumption (no-loading)
|Primary current protection
|An adequate internal fuse on the AC input line is provided.
|AC Inrush Current
No damage shall be occurred and the input fuse shall not be blown up nominal input voltage full load
25°C cold start.
|Nominal DC output voltage
|Minimum load current
|Rating load current
|Peak load current
|Rating output power
|The line regulation is less than ±5% while measuring at rated load and +/-10% of input voltage changing.
|The load regulation for +12.0V is less than ±5%, at measured output load from 10% to 100% rated load.
|Peak load regulation
|The peak load regulation for +12.0V is less than / , at measured output load from 30% to 100% rated load.
|Ripple and noise
|Add 0.1uF/50V ceramic capacitor and 10uF/50V aluminum electrolytic capacitor across the output terminal. Measured with 20MHz Bandwidth Oscilloscope.
|115V/60Hz and 230V/50Hz, output current from 100%, 75%, 50%, 25%.
|Turn on delay time
|3000 mS max. at nominal input AC voltage and full load
|The supply shall have a start-up rise time of less than 20mS to rise to within regulation limits for all DC outputs.
|Hold up time
|8 mS minimum at nominal input 100V AC minimum voltage and full load.
|Less than 7% of nominal voltage value.
|LED indication function
|Short-circuit protection：The adapter shall not be damaged by short the DC output to Ground. The adapter shall resume normal operation when a short circuited fault condition is removed.
|Over current protection：The output shall be protected against the over current conditions.