MAX5952AEAX+ Maxim Integrated Products, MAX5952AEAX+ Datasheet - Page 38

• Manufacturer Part Number: MAX5952AEAX+
• Description: IC PSE CNTRLR FOR POE 36-SSOP
• Manufacturer: Maxim Integrated Products
• Type: Power Over Ethernet Controller (PoE)r

Specifications of MAX5952AEAX+

• Applications: Remote Peripherals (Industrial Controls, Cameras, Data Access)
• Internal Switch(s): No
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-BSOP (0.300", 7.5mm Width)
• Product: Controllers & Switches
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.71 V
• Power Dissipation: 941 mW
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Supply Current: 4.8 mA
• Input Voltage: 60V
• Digital Ic Case Style: SSOP
• No. Of Pins: 36
• Uvlo: 28.5V
• Frequency: 400kHz
• Interface: I2C
• Termination Type: SMD
• Rohs Compliant: Yes
• Filter Terminals: SMD
• Controller Type: Power Over Ethernet PD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

High-Power, Quad, PSE Controller
for Power-Over-Ethernet
Setting EN_WHDOG (Table 27) high activates the
watchdog counter. When the counter reaches zero, the
port switches to the hardware-controlled mode deter-
mined by the corresponding HWMODE_ bit. A low in
HWMODE_ switches the port into shutdown by setting
The CLC_EN enables the large capacitor detection fea-
ture. When CLC_EN is set the device can recognize a
capacitor load up to 100µF. If the CLC_EN is reset, the
MAX5952 performs normal detection.
AC_TH allows programming of the threshold of the AC
disconnect comparator. The threshold is defined as a
current since the comparators verify that the peak of
the current pulses sensed at the DET_ input exceed a
preset threshold. The current threshold is defined as
follows:
Table 27. Switch Mode Register
Table 28. Program Register
38
EN_WHDOG
WD_INT_EN
Reserved
Reserved
HWMODE4
HWMODE3
HWMODE2
HWMODE1
Reserved
Reserved
CLC_EN
DET_BY
OSCF_RS
AC_TH
SYMBOL
SYMBOL
______________________________________________________________________________________
ADDRESS = 1Fh
ADDRESS = 23h
BIT
BIT
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
—
—
A logic-high enables the watchdog function
Enables interrupt on SMODE_ bits
Reserved
Reserved
Port 4 switches to AUTO if logic-high and to SHUTDOWN if logic-low when watchdog timer
expires
Port 3 switches to AUTO if logic-high and to SHUTDOWN if logic-low when watchdog timer
expires
Port 2 switches to AUTO if logic-high and to SHUTDOWN if logic-low when watchdog timer
expires
Port 1 switches to AUTO if logic-high and to SHUTDOWN if logic-low when watchdog timer
expires
Reserved
Reserved
Large capacitor detection enable
Enables skipping detection in AUTO mode
OSC_FAIL reset bit
AC_TH[2]
AC_TH[1]
AC_TH[0]
the bits in register R12h to 00. A high in HWMODE_
switches the port into auto mode by setting the bits in
register R12h to 11. If WD_INT_EN is set, an interrupt is
sent if any of the SMODE bits are set. A reset sets R1Fh
= 00h.
where NAC_TH is the decimal value of AC_TH.
When set low, DET_BY inhibits port power-on if the dis-
covery detection was bypassed in auto mode. When
set high, DET_BY allows the device to turn on power to
a non-IEEE 802.3af load without doing detection. If
OSCF_RS is set high, the OSC_FAIL bit is ignored. A
reset or power-up sets R23h = 04h. Default IAC_TH is
340µA.
IAC_TH = 226.68µA + 28.33 x NAC_TH
DESCRIPTION
DESCRIPTION