Analog Devices DC2911A Demo Manual page 5

QUICK START PROCEDURE
AUXILIARY SUPPLY INPUT
1. Place and connect test equipment (voltmeter, amme-
ter, oscilloscope and electronic load) as shown in
Figure 6.
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
DC2911A as shown in Figure 6. Turn on the auxiliary
Figure 6. Setup Diagram for Auxiliary Supply Input
Table 3. T2P Response During Auxiliary Power Operation
PD CLASS
0 – 4
5 – 8
* T2P Frequency is 840Hz typical
DEMO MANUAL DC2911A
supply and set its current limit to 2A. Then increase
its output voltage to 48V.
4. Once the LED (D3) on the DC2911A is lit, check the
output voltage using a voltmeter. Output voltage
should be within 37V to 57V.
5. Verify T2P response with an oscilloscope as shown
in Figure 6. The T2P response during auxiliary power
operation is provided in Table 3.
V
IN
+
DC/DC
CONVERTER
V
IN
–
ENABLE
PSE TYPE
OPTO
(TO P)
+
AUXILIARY
DC POWER
SUPPLY
–
DC2911A F06
T2P RESPONSE
Logic Low
75% Logic Low*
Rev. 0
5