Datasheet

MAX5922
+48V, Single-Port Network Power Switch
For Power-Over-LAN
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 48V, V
DIG
= 3.3V, AGND_S = AGND = DGND = 0V, R
SENSE
= 0.5Ω ±1%, UVLO = open, EN = V
DIG
, R
RCL
= 150Ω ±1%, R
RDT
= 18.2kΩ ±1%, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
t
POK_LOW
POK from high to low, V
OUT
falling 1.0 1.4 1.8
POK Output Delay (Note 6)
t
POK_HIGH
POK from low to high, V
OUT
rising 74 88 102
ms
Zero-Current Detection Threshold
Voltage (V
IN
- V
DRS
)
V
ZCTH
(Note 4) 2.7 3.75 4.8 mV
ZC Output Low Voltage V
ZC_LOW
I
ZC
= 3mA 0.4 V
ZC Output Leakage Current V
ZC
= 3.3V 0.05 1 µA
Zero-Current Detection Delay t
ZCDEL
ZC from high to low, I
OUT
falling (Note 7) 300 350 400 ms
Zero-Current Deglitch Time t
ZC_DEG
I
OUT
rising 10 ms
Temperature rising 150 °C
Thermal Shutdown
Hysteresis 30 °C
Shutdown Autorestart Time t
RESTART
LATCH = low (Note 8) 1.60 1.92 2.24 s
UNDERVOLTAGE LOCKOUT
MAX5922A 36 38 40
UVLO floating, V
IN
rising
MAX5922B/
MAX5922C
26 28 30
MAX5922A 4.4
Default V
IN
UVLO UVLO
TH
Hysteresis
MAX5922B/C 2.5
V
MAX5922A 1.36 1.38 1.41
Referenced to AGND_S,
V
UVLO
rising
MAX5922B/
MAX5922C
1.31 1.33 1.36
V
MAX5922A 160
UVLO Comparator Threshold V
REF
Hysteresis
MAX5922B/
MAX5922C
120
mV
UVLO Input Resistance 50 kΩ
LOGIC SIGNALS
EN, LATCH, DCA, DET_DIS
CLASS, and ZC_EN Input High
Voltage
V
IH
1.65V < V
DIG
< 5.5V
0.7 ×
V
DIG
V
1.65V < V
DIG
< 2.0V
0.3 ×
V
DIG
EN, LATCH, DCA, DET_DIS
CLASS, and ZC_EN Input Low
Voltage
V
IL
2.0V < V
DIG
< 5.5V 0.8
V
EN, LATCH, DCA, DET_DIS
CLASS, and ZC_EN Input Current
-1 +1 µA
EN Low Pulse Width 3µs
FAULT, CL0, CL1 and CL2,
Output Low Voltage
V
OL
I
SINK
= 3mA 0.4 V
FAULT, CL0, CL1 and CL2,
Output Leakage Current
V
FAULT
= V
CL0
= V
CL1
= V
CL2
= 3.3V,
CLASS = 0V
0.05 1 µA