MAX5922BEUI+ Maxim Integrated Products, MAX5922BEUI+ Datasheet - Page 10

• 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
*This is not a device pin.
10
3, 6, 26
______________________________________________________________________________________
PIN
1, 2
10
11
12
13
14
15
16
17
18
19
20
4
5
7
8
9
*
AGND_S
LATCH
DRAIN
FAULT
NAME
AGND
DGND
UVLO
POK
N.C.
RCL
RDT
CL2
CL1
CL0
TP1
TP2
TP3
ZC
IN
Analog Ground. This is the return of analog power input. AGND can vary ±4V from DGND. AGND and
DGND must be connected together at a single point in the system.
Drain connection for the integrated MOSFET. Connect a sense resistor, R
These pins are also the current-sense resistor negative terminal. R
and open-circuit detection threshold. These two pins must be connected together.
No Connection. Not internally connected. Leave pins 6 and 26 open. Pins 6 and 26 are left
unconnected to provide additional spacing between the high-voltage pins and other pins.
Input Voltage. Connect to a positive voltage source between +32V to +60V from IN to AGND. This is
the current-sense resistor positive terminal. Bypass to AGND with a 47µF, 100V electrolytic capacitor
and a 0.1µF, 100V ceramic capacitor. Place the ceramic capacitor close to this pin.
Classification Sense Resistor. Connect a 150Ω ±1% resistor from RCL to IN for sensing the
classification current. Leave RCL floating when the PD classification function is not used.
Analog Ground Sense. Connect a 1Ω resistor from AGND_S to AGND. This resistor protects the IC
during an output short-circuit condition.
Undervoltage Lockout Adjustment Input. Referenced to AGND. Connect to the center point of a
resistive-divider from IN to AGND to adjust the UVLO threshold. Leave open for default value.
Detection Sense Resistor. Connect an 18.2kΩ ±1% resistor from RDT to AGND for sensing the PD
detection current. Add a 680nF capacitor in parallel to this resistor to filter out the power-line noise.
Connect RDT to AGND when the PD detection function is not used.
Fault Signal Open-Drain Logic Output. Reference to DGND. FAULT is latched low when:
1. An overtemperature condition occurs and/or,
2. An overcurrent condition that has lasted for more than t
Power-OK, Open-Drain Logic Output. Reference to DGND. POK goes open drain a time t
after V
V
Zero-Current Fault Signal. Open-drain logic output. Reference to DGND. ZC is latched low when there
is a zero-current condition lasting longer than t
detection circuit is enabled immediately after the POK signal goes high. The ZC is unlatched after a
valid PD has been detected and eventually classified.
Must be Left Open or Connected to AGND
Must be Left Open or Connected to AGND
Must be Left Open or Connected to AGND
Classification Report Logic Output Bit 2. See the PD Classification section (Table 2).
Classification Report Logic Output Bit 1. See the PD Classification section (Table 2).
Classification Report Logic Output Bit 0. See the PD Classification section (Table 2).
Digital Ground. DGND can vary ±4V from AGND. DGND and AGND must to be connected together at
a single point in the system.
Fault Management Selection Digital Input. Referenced to DGND. Connect to a logic high to latch off
after a fault condition. Connect to a logic low for automatic restart after a fault condition (see the Fault
Management section).
THPOK
OUT
from V
raises to within V
IN
.
THPOK
from V
IN
. POK goes low a time t
FUNCTION
ZCDEL
. ZC is open-drain otherwise. The zero-current
OC
.
SENSE
POK_LOW
sets the overcurrent-limit
SENSE
Pin Description
after V
, from DRAIN to IN.
OUT
falls out of the
POK_HIGH