Rainbow Electronics MAX5971А - Manual (Page 20)

20 _____________________________________________________________________________________
MAX5971A
Single-Port, 40W, IEEE 802.3af/802.3at PSE
Controller with Integrated MOSFET
Figure 7. Typical Operating Circuit 2 (AC Load Removal Detection, Internal PWM Enabled for LED Indication, and Class 5
Detection Enabled)
Figure 8. Typical Operating Circuit 3 (IEEE 802.3at Compliant, Minimal Application Circuit with DC Load Removal Detection and No
LED Indication)
1N4448
S1B
1kI
1kI
1kI
1nF
0.1µF
-54V
5.1kI
LED
10mH 1N4448
0.1µF
100V 47µF
100V
0.47FF
100V
-54V
LED
AGND
EN
V EE
V EE_DIG
LEGACY
MIDSPAN
OSC
OUT
OUTP
DET
ILIM1
ILIM2
PWMEN
MAX5971A
0.1µF
100V
SMJ58A 2.2MI
PSE OUTPUT
1N4448
1nF
-54V
AGND
EN
LED
V EE_DIG
V EE
PWMEN
LEGACY
MIDSPAN
OSC
OUT
OUTP
DET
ILIM1
ILIM2
MAX5971A
0.1µF
100V
SMJ58A 2.2MI
47µF
100V 0.1µF
100V
PSE OUTPUT