High-Power, Quad, PSE Controller
for Power-Over-Ethernet
14 ______________________________________________________________________________________
Functional Diagram
50礎
90礎
100mA
MAX
FAST
DISCHARGE
CONTROL
212mV
182mV
13V CLAMP
CURRENT-LIMIT
DETECTOR
4mV
OVERCURRENT
(OVC)
OPEN CIRCUIT
(OC)
CURRENT
LIMIT (ILIM)
PWR_EN
10V
VOLTAGE
SENSING
FOLDBACK
CONTROL
9-BIT ADC
CONVERTER
VOLTAGE PROBING
AND
CURRENT-LIMIT
CONTROL
CURRENT SENSING
SENSE_
GATE_
OUT_
DET_
A = 3
AC
DETECTION
ACD_ENABLE
AC DISCONNECT
SIGNAL
(ACD)
ACD
REFERENCE
CURRENT
DETECTION/
CLASSIFICATION
SM
PORT
STATE
MACHINE
(SM)
REGISTER FILE
SERIAL
PORT
INTERFACE
(SPI)
AUTO
MIDSPAN
A0
A1
A2
A3
ANALOG
BIAS/
SUPPLY
MONITOR
AGND
V
EE
V
DD
DGND
+10V ANALOG
+5V DIG
VOLTAGE
REFERENCES
CURRENT
REFERENCES
CENTRAL LOGIC UNIT
(CLU)
DGND
OSC_IN
SCL SDAIN SDAOUT
V
DD
OSCILLATOR
MONITOR
SHD_
RESET
INT
MAX5952
9 BITS
ADC
REGISTER
FILE
CURRENT
MEASUREMENT
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