CAT3616
Block Diagram
Figure 24. CAT3616 Functional Block Diagram
Basic Operation
At power ? up, the CAT3616 starts operating in 1x mode
where the output will be approximately equal to the input
supply voltage (less any internal voltage losses). If the
output voltage is sufficient to regulate all LED currents the
device remains in 1x operating mode.
If the input voltage is insufficient or falls to a level where
In 1.5x mode, the output is approximately equal to 1.5
times the input supply voltage (less any internal voltage
losses).
The above sequence is repeated each and every time the
chip is powered ? up or is taken out of shutdown mode (via
EN pin).
the regulated currents cannot be maintained, the device
automatically switches (after 400 m s) into 1.5x mode.
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