5

dc2583af

DEMO MANUAL DC2583A

Quick start proceDure

Auxiliary Supply Input

1. Place and connect test equipment as shown in Figure 5.

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

DC2583A as shown in Figure 5. Turn on the auxiliary

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

output voltage to 48V.

4. Once the LED (D3) on the DC2583A is lit, check the

outputvoltageusingavoltmeter.Outputvoltageshould

be within 37-57V.

5. Verify T2P response with an oscilloscope as shown

in Figure 5. The T2P response during auxiliary power

operation is provided in Table 3.

Figure 5. Setup Diagram for Auxiliary Supply Input

LOAD

DC2583 F05

OPTO

+

VIN

–

+ AUXILIARY

DC POWER

SUPPLY

–

ENABLE

PSE TYPE

(TO µP)

DC/DC

CONVERTER

Table 3. T2P Response During Auxiliary Power Operation

PD CLASS

T2P RESPONSE

0–4

Logic Low

5–8

75% Logic High/25% Logic Low,

Toggle at 840Hz (typical)