Typical Performance Characteristics; Quick Start Procedure - Analog Devices DC2911A Demo Manual

DEMO MANUAL DC2911A

TYPICAL PERFORMANCE CHARACTERISTICS

Figure 1. Thermal Pictures (Conditions: V

QUICK START PROCEDURE

POWER OVER ETHERNET (PoE) INPUT
1. Disconnect auxiliary supply if it is connected to AUX+
and AUX– inputs of the DC2911A.
2. Refer to Figure 3 or Figure 4 to evaluate the DC2911A
with a DC/DC converter. If a resistive or an active load
is used to evaluate the DC2911A, use the setup dia-
gram as shown in Figure 5.
3. Default class shunt positions are at JP1 and JP2 on
the DC2911A board. In this configuration, any PSE
with enough power will turn on this PD. Choose a
power level from Table 1 and select the corresponding
shunt positions.
2
Top Side
99.6
99.3
99.0
98.7
98.4
0
Figure 2. Efficiency (End-to-End)
= 41.2V, V
PORT OUT
0.3 0.6 0.9 1.2 1.5
LOAD CURRENT (A)
DC2911A F02
4. Connect the output of the LTPoE ++ or IEEE
802.3bt compliant PSE to the RJ45 connector (J1) of
the DC2911A using a CAT5e or CAT6 Ethernet cable.
(See Note.)
5. After connection has been established, verify that the
LED (D3) is lit. This indicates the PSE has success-
fully detected and powered the PD.
6. Verify T2P response with a digital multimeter or an
oscilloscope. The T2P response to the type of PSE
connected to the DC2911A is provided in Table 2.
Bottom Side
= 40.8V, I = 1.72A)
OUT
1.8
Rev. 0