1、DESCRIPTION:

The purpose of the document is to specify the functional requirements of a 120W switching power supply.

2、INPUT CHARACTERISTICS:

   2.1 Input Voltage:

Rated Voltage:100~240Vac

Variation Range:90-264Vac

   2.2 Input Frequency:

Rated Frequency: 50/60Hz.

Variation Frequency:47-63Hz

   2.3 Input Current:

2.5Amps max At any input voltage and rated, DC output rated load.

   2.4 Inrush Current:

120 Amps Max. Cold start at 240Vac input, with rated load and 25℃ ambient.

   2.5 Ac Leakage Current:

0.25mA Max.At240Vac input.

3、OUTPUT CHARACTERISTICS:

3.1 Power output

3.2 Combined Load/Line Regulation

3.3Ripple and Noise:

   Under nominal voltage and nominal load,the ripple and noise are as follows when measure with Max.Bandwidth of 20MHz and Parallel 47uF/0.1uF,crossed connected at testing point.

Voltage                Ripple and Noise(Max.)

+24Vdc                 120mV p-p

3.4 Turn on delay time:

   3Second Max.at 115Vac input and output Max.load.

3.5 Rise time:

   40 mS Max.at 115Vac input and output Max load.

3.6 Hold up time:

   5 mS Min.at 115Vac input and output Max.Load.

3.7 Efficiency:

      75% Min, At 115/230Vac input voltage,1/4，1/2，3/4 and full load calculation average efficiency.

4、PROTECTION FUNCTION:

4.1 Short circuit test:

The power supply will be auto recovered when short circuit faults remove.

4.2 Over current Protection:

The power supply will be auto recovered when over current faults remove.

4.3 Over Voltage Protection:

The power supply will auto recovered when faults remove 120%~170%.

5、ENVIRONMENTAL REQUIREMET:

5.1Operating Temperature:

0℃ to 40℃,Full load, Normal operation.

5.2 Storage Temperature:-20℃ to 80℃

With package

5.3 Relative Humidity:

5%(0℃)~90%(40℃)RH,72Hrs,Full load, Normal operating.

5.4 Vibration:

Operating: IEC 721-3-3 3M3

5~9Hz,A=1.5mm

9~200Hz,Acceleration 5m/S2

2. Transportation:

IEC 721-3-2 2M2

5-9Hz,A=3.5mm

9~200Hz, Acceleration=5m/S2

200~500Hz, Acceleration=15m/S2

3. Axes,10 cycles per axis.

No permanent damage may occur during testing.

The SAMPLE has to restore to its original situation after power off/on..

5.5 Dropping Packed:

1M for wallmount type and 760mm for desktop type as above described.

The horizontal surface consists of hardwood at least 13mm thick, mounted on two layers of plywood

each 19mm to 20mm thick,all supported on a concrete or equivalent non-resilient floor.

6、SAFETY REQUIREMENT:

6.1Safety: accord with

6.2 DIELECTRIC STRENGTH Hi-Pot:

Primary to secondary:1800Vac10mA/3S for type test.

6.3        Iusulation resistance:

Primary to secondary:10MΩ min at 500V DC.

6.4  EMI STANDARD

Meets the Limits of

<1>.Fcc part15 class B rules

<2>.EN55022 class B rules

<3>.GB9254-1998,GB17625.1-2003

7、MECHANICAL REQUIREMENT:

7.1 Enclosure:

The power supply size: L173 x W72 x H42mm;

7.2 nput Connector:

                IEC-320-C14.

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