SC624AEVB datasheet(15/23 Pages) SEMTECH

15 / 23 page

SC624A

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 (typically 300mA).

LDO Current Limit

The device limits the output currents of LDO1 and LDO2 to

help prevent it from overheating and to protect the loads.

Applications Information (continued)

The minimum limit is 200mA, so load current greater than

the rated 100mA can be used with degraded accuracy

and larger dropout without tripping the current limit.

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.

SC624AEVB Datasheet(PDF) 15 Page - Semtech Corporation