SSL5021BTS datasheet(6/20 Pages) NXP

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SSL5021BTS Datasheet(PDF) 6 Page - NXP Semiconductors

Part #	SSL5021BTS

Description	Compact low-ripple buck LED driver IC

PDF	20 Pages

Scroll/Zoom	100%

Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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6 / 20 page

SSL5021BTS

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 2 — 11 March 2015

6 of 20

NXP Semiconductors

SSL5021BTS

Compact low-ripple buck LED driver IC

8.4 Start-up current

The supply current for the IC is supplied by resistor R3. The IC drawns an additional

start-up current (ICC(startup)) just before VCC reaches the start-up voltage level (Vstartup). So

the supply current in operating mode is lower than during start-up conditions, preventing

lamp flicker when the mains voltage is increased or decreased slowly. Figure 6 shows the

basic behavior.

Fig 5.

Buck waveforms and valley detection

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