SC624 Ver la hoja de datos (PDF) - Semtech Corporation

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Fabricante

SC624

LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and SemWire™ Interface

Semtech Corporation 

SC624

Applications Information (continued)

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. 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.

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