0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
Pin Description (continued)
PIN
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
—
NAME
LED1
LED2
POL
DREG
ON1
FAULT1
FAULT2
SDA
SCL
ALERT
PG1
PG2
HWEN
DGND
ON2
RETRY
MODE
LED4
LED3
GND2
GATE2
MON2
SENSE2
EP
FUNCTION
LED Driver 1
LED Driver 2
Polarity Select Input. Connect to DREG for active-high power-good outputs (PG_). Connect to GND for
active-low power-good outputs.
Logic Power-Supply Input. Connect to REG externally through a 10 I resistor and to DGND with a 1 F F
ceramic capacitor.
Channel 1 Precision Turn-On Input
Channel 1 Active-Low Open-Drain Fault Output. FAULT1 goes low if an overcurrent occurs on channel 1.
Channel 2 Active-Low Open-Drain Fault Output. FAULT2 goes low if an overcurrent occurs on channel 2.
I 2 C Serial-Data Input/Output
I 2 C Serial-Clock Input
Open-Drain Alert Output. ALERT goes low during a fault to notify the system of an impending failure.
Channel 1 Open-Drain Power-Good Output
Channel 2 Open-Drain Power-Good Output
Hardware Enable Input. Connect to DREG or DGND. State is read upon power-up as V IN crosses the
UVLO threshold and sets enable register bits with this value. After UVLO, this input becomes inactive until
power is cycled.
Digital Ground. Connect all GND_ and DGND to AGND externally using a star connection.
Channel 2 Precision Turn-On Input
Autoretry Fault Management Input. Connect to DREG to enable autoretry operation. Connect to DGND to
enable latched-off operation.
Hot-Swap Two-State Mode Select Input. Connect MODE to DGND, DREG or leave it unconnected to oper-
ate the hot-swap channels independently or as a pair.
LED Driver 4
LED Driver 3
Channel 2 Gate Discharge Current Ground Return. Connect all GND_ and DGND to AGND externally
using a star connection.
Channel 2 Gate-Drive Output. Connect to gate of an external n-channel MOSFET.
Channel 2 Voltage Monitoring Input
Channel 2 Current-Sense Input. Connect SENSE2 to the source of an external MOSFET and to one end of
R SENSE2 .
Exposed Pad. EP is internally grounded. Connect externally to ground plane using a star connection.
_______________________________________________________________________________________
9
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