MAX5971A Maxim Integrated Products, MAX5971A Datasheet - Page 20

• Manufacturer Part Number: MAX5971A
• Description: Single-Port 40W IEEE 802.3af/at PSE Controller with Integrated MOSFET
• Manufacturer: Maxim Integrated Products

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)
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-54V
47µF
100V
-54V
1N4448
0.1µF
100V
47µF
100V
1nF
LED
10mH
5.1kI
0.1µF
V
V
EN
LED
PWMEN
LEGACY
MIDSPAN
OSC
1nF
0.1µF
100V
EE
EE_DIG
MAX5971A
LED
EN
V
V
LEGACY
MIDSPAN
OSC
EE
EE_DIG
AGND
MAX5971A
AGND
OUTP
ILIM1
ILIM2
SMJ58A
OUT
DET
PWMEN
OUTP
ILIM1
ILIM2
SMJ58A
OUT
DET
1N4448
0.1µF
100V
S1B
1kI
1kI
1N4448
0.1µF
100V
1kI
2.2MI
PSE OUTPUT
2.2MI
0.47FF
100V
-54V
PSE OUTPUT