MAX5922AEUI MAXIM [Maxim Integrated Products], MAX5922AEUI Datasheet - Page 11

• Manufacturer Part Number: MAX5922AEUI
• Description: +48V, Single-Port Network Power Switch For Power-Over-LAN
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 1. MAX5922 Block Diagram
27, 28
PIN
21
22
23
24
25
DET_DIS
ZC_EN
CLASS
NAME
+48V, Single-Port Network Power Switch
V
DCA
OUT
EN
______________________________________________________________________________________
DIG
CLASS
ZC_EN
LATCH
FAULT
DGND
VDIG
POK
DCA
CL2
CL1
CL0
ZC
EN
N
Zero-Current-Detection Enable Logic Input. Referenced to DGND. Connect ZC_EN to a logic high to
enable the zero-current detection circuitry. Connect ZC_EN to a logic low to disable this function.
ON/OFF Control-Logic Input. Referenced to DGND. Connect to a logic high to enable the device.
Connect to a logic low to disable the device and reset a latched-off condition.
Digital Supply Voltage. V
CLASS, DET_DIS, DCA, and ZC_EN input logic thresholds are automatically scaled to the voltage on
V
Classification Enable Digital Input. Connect to DGND to disable the classification function. Connect to
V
PD Detection Disable Logic Input. When DET_DIS is connected to a logic high, the part skips the
detection and classification (regardless of the status of CLASS) phases and powers on immediately
after EN = high (MAX5922B/MAX5922C only).
Detection Collision Avoidance Logic Input. Connect to a logic high to activate the detection collision
avoidance circuitry for midspan system. Connect to DGND to disable this function. (MAX5922A only).
See the Detection Collision Avoidance section.
Output Voltage
DIG
DIG
N
N
N
. See the Typical Application Circuit for proper filtering.
N
to enable the classification function.
N
TRANSLATOR
LOGIC-
DIG
LEVEL
is the supply voltage for the internal digital logic circuity. EN, LATCH,
CONTROL
ANALOG
CONTROL
LOGIC
FUNCTION
For Power-Over-LAN
CHARGE
PUMP
OSC
Pin Description (continued)
REGULATOR
VOLTAGE
CLASSIFICATION
MAX5922
DETECTION
CIRCUITRY
AND
N
IN
CSP
DRAIN
OUT
UVLO
RCL
RDT
AGND
11