CAT3614HV2-T2 datasheet(9/12 Pages) CATALYST

Part #	CAT3614HV2-T2

Description	4-Channel 1-Wire LED Driver in 3x3mm Package

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Manufacturer	CATALYST [Catalyst Semiconductor]

Direct Link	http://www.catalyst-semiconductor.com

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9 / 12 page

CAT3614

9

Doc. No. 25095, Rev. 01

Characteristics subject to change without notice

BLOCK DIAGRAM

Figure 2. CAT3614 Functional Block Diagram

BASIC OPERATION

At power-up, the CAT3614 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 the regulated currents cannot be maintained,

the device

automatically switches (after a fixed

delay of 400µs) into 1.5x mode.

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/DIM pin).

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