MAX5922BEUI+ Maxim Integrated Products, MAX5922BEUI+ Datasheet - Page 14

• Manufacturer Part Number: MAX5922BEUI+
• Description: IC NETWORK PWR SW +48V 28-TSSOP
• Manufacturer: Maxim Integrated Products
• Type: Power over Ethernet Switch (PoE)r

Specifications of MAX5922BEUI+

• Applications: Remote Peripherals (Industrial Controls, Cameras, Data Access)
• Internal Switch(s): Yes
• Voltage - Supply: 32 V ~ 60 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP
• On Resistance (max): 0.45 Ohms
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

+48V, Single-Port Network Power Switch
For Power-Over-LAN
Figure 3. PSE Detection Source
Figure 4. Operational Flow Chart (MAX5922B/MAX5922C with DET_DIS Connected High)
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______________________________________________________________________________________
INCREMENT
t
ZC_DEG
N
POWER-ON
LATCH = HIGH?
Y
FAULT = LOW
t
ZCDEL
IS I
t
SHUT-OFF
ZC_DEG
RESET t
INCREMENT
SWITCH
SHUT-OFF
N
ZC = LOW
Y
SWITCH
OUT
t
t
RESET
ZC_DEG
ZCDEL
= 350ms?
< I
ZCDEL
= 10ms?
Y
ZCTH
Y
?
INTERNAL TO MAX5922
N
V
RESET
Y
PROBE_VOLTAGE
N
I
MAX
= 1.5mA
V
OUT
AFTER t
Y
N
Y
LOW TO HIGH
- V
EN = LOW?
ELAPSED
POK HIGH
t
RESTART
IN
< V
POK_DLY
V
N
N
Y
IN
THPOK
> UVLO
t
RESET
ZC_DEG
t
SHUTDOWN
DETECTED?
?
ZCDEL
THERMAL
TH
Y
?
27, 28
N
Y
N
7
AFTER t
HIGH TO LOW
POK LOW
OUT
AGND_S
POK_DLY
N
Y
EN = HIGH?
ZC_EN = HIGH?
IS POK HIGH?
D1
Y
Y
Y
N
OVERCURRENT
N
TRANSACTION
COUNTER
DETECTED?
RESET
TO HIGH
EN LOW
N
OVERCURRENT
DETECTED
N
POWER DEVICE
START POWER-UP
RESET FAULT, ZC
OVERCURRENT
OVERCURRENT
INCREMENT
COUNTER
= HIGH
Y
R
PD
OVERCURRENT
COUNTER = 60?
N
Y