SC623A View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
SC623A
Semtech Corporation
'SC623A' PDF : 21 Pages View PDF
SC623A
Applications Information (continued)
Over-Temperature Protection
The Over-Temperature (OT) protection circuit helps
prevent the device from overheating and experiencing
a catastrophic failure. When the junction temperature
exceeds 160°C, the device goes into thermal shutdown
with all outputs disabled until the junction temperature
is reduced. All register information is retained during
thermal shutdown.
Charge Pump Output Current Limit
The device also limits the charge pump current at the
VOUT pin. When VOUT is shorted to ground, the typical
output current is 300mA. The current limiting is triggered
by an output under-voltage lockout below 2V. The output
returns to normal when the short is removed and VOUT is
above 2.5V. Above 2.5V, a typical current limit of 300mA
applies when the FL current sink is off and a typical current
limit of 1A applies when the FL current sink is on.
LED Float Detection
Float detect is a fault detection feature of the LED current
sink outputs. If an output is programmed to be enabled
and an open circuit fault occurs at any current sink output,
that output will be disabled to prevent a sustained output
OVP condition from occurring due to the resulting open
loop. Float detect ensures device protection but does
not ensure optimum performance. Unused LED outputs
must be disabled to prevent an open circuit fault from
occurring.
13
Share Link: 