Rainbow Electronics MAX5971B - Manual (Page 44)

44 _____________________________________________________________________________________
MAX5971B
Single-Port, 40W, IEEE 802.3af/at,
PSE Controller with I 2 C
Figure 17. Typical Operating Circuit 3 (IEEE 802.3at Compliant, Minimal Application Circuit with DC Load Removal Detection and
No LED Indication)
Figure 16. Typical Operating Circuit 2 (AC Load Removal Detection, Internal PWM Enabled for LED Indication, and Class 5
Detection Enabled)
-54V
AGND
SDA SCL AD0 INT
LED
PWMEN
V EE_DIG
V EE
LEGACY
MIDSPAN
OSC
EN
OUT
OUTP
DET
ILIM1
ILIM2
MAX5971B
PSE OUTPUT
SERIAL INTERFACE
47µF
100V
0.1µF
100V
2.2MI 0.1µF
100V
SMJ58A
1N4448
1nF
5.1kI
1kI
1kI
1kI
2.2MI
0.47µF
100V
0.1µF
100V
SMJ58A
-54V
-54V
47µF
100V
0.1µF
100V
1N4448
1N4448
10mH
1nF
AGND
SERIAL INTERFACE
SDA SCL AD0 INT
V EE
V EE_DIG
EN
LED
LED
LEGACY
MIDSPAN
OSC
OUT
OUTP
PWMEN
DET
ILIM1
ILIM2
MAX5971B
PSE OUTPUT
0.1µF