6

dc2475aafb

DEMO MANUAL

DC2475A-A

Figure 9: Setup Diagram for Auxiliary Supply Input

Auxiliary Supply Input

1. Place and connect test equipment (voltmeter, ammeter,

oscilloscope, and electronic load) as shown in Figure 9.

2. Turn down the electronic load to a minimum value and

turn off the electronic load.

3. Connect the output of the auxiliary supply to the

DC2475A as shown in Figure 9. Turn on the auxiliary

supply and set its current limit to 2A. Then increase its

output voltage to 48V.

QuicK start proceDure

4. Once the LED (D4) on the DC2475A is lit, check the

output voltage using a voltmeter. Output voltage should

be within 12.0V ± 0.2V.

5. Turn on the electronic load and increase its load cur-

rent up to 3A. Observe the output voltage regulation,

efficiency, and other parameters.

6. Verify T2P response with an oscilloscope as shown

in Figure 9. The T2P response during auxiliary power

operation is provided in Table 2.

Table 2. T2P Response During Auxiliary Power Operation

T2P RESPONSE

PD OUTPUT POWER (W)

75% Logic High/25% Logic Low, Toggle at 976Hz ±7%

36

AMMETER

+

–

VOLTMETER

+

–

ELECTRONIC

LOAD

+

–

OSCILLOSCOPE

+

–

J1

AUXILIARY SUPPLY

+

–