MAX5965AUAX+ Maxim Integrated Products, MAX5965AUAX+ Datasheet - Page 30

• Manufacturer Part Number: MAX5965AUAX+
• Description: IC PSE CTRLR FOR POE 36SSOP
• Manufacturer: Maxim Integrated Products
• Type: Power Over Ethernet Controller (PoE)r

Specifications of MAX5965AUAX+

• Applications: IP Phones, Power over LAN, Network Routers and Switches
• Internal Switch(s): No
• Voltage - Supply: 2.4 V ~ 3.6 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-BSOP (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
The MAX5965A/MAX5965B continuously monitor the
power supplies and set the appropriate bits in the sup-
ply event register (Table 12). V
whenever V
V
below its undervoltage threshold.
OSC_FAIL is set to 1 whenever the amplitude of the
oscillator signal at the OSC input falls below a level that
might compromise the AC disconnect detection func-
tion. OSC_FAIL generates an interrupt only if at least
one of the ACD_EN (R13h[7:4]) bits is set high.
A thermal shutdown circuit monitors the temperature of
the die and resets the MAX5965A/MAX5965B if the
temperature exceeds +150°C. TSD is set to 1 after the
MAX5965A/MAX5965B return to normal operation. TSD
is also set to 1 after every UVLO reset.
Table 12. Supply Event Register
30
TSD
V
V
V
V
V
OSC_FAIL
V
DD_UV
DD_OV
DD_UV
EE_UVLO
EE_OV
EE_UV
DD_UVLO
______________________________________________________________________________________
SYMBOL
/V
EE_UV
DD
/V
EE
is set to 1 whenever V
exceeds its overvoltage threshold.
BIT
7
6
5
4
3
2
1
0
DD_OV
0Ah
R/W
R
R
R
R
R
R
R
R
ADDRESS
/V
EE_OV
R/W
CoR
CoR
CoR
CoR
CoR
CoR
CoR
CoR
0Bh
DD
/V
is set to 1
EE
Overtemperature shutdown
V
V
V
V
V
Oscillator amplitude is below limit
V
DD
DD
EE
EE
EE
DD
falls
undervoltage lockout condition
overvoltage condition
undervoltage condition
overvoltage condition
undervoltage condition
undervoltage lockout condition
When V
MAX5965A/MAX5965B are in reset mode and securely
holds all ports off. When V
their respective UVLO thresholds, the device comes out
of reset as soon as the last supply crosses the UVLO
threshold. The last supply corresponding UV and UVLO
bits in the supply event register is set to 1.
A 1 in any supply event register’s bits forces R00h[7] to
1. As with any of the other events register, the supply
event register has two addresses. When read through
the R0Ah address, the content of the register is left
unchanged. When read through the CoR R0Bh
address, the register content is cleared. A reset sets
R0Ah/R0Bh to 00100001b if V
to 00010100b if V
DD
and/or |V
DESCRIPTION
EE
EE
comes up after V
| is below its UVLO threshold, the
DD
DD
and |V
comes up after V
DD
EE
.
| rise to above
EE
or