ZXSC310 datasheet(11/14 Pages) ZETEX

No. de pieza	ZXSC310

Descripción Electrónicos	LED DRIVER SOLUTION FOR LCD BACKLIGHTING

PDF	14 Pages

Scroll/Zoom	100%

Fabricante Electrónico	ZETEX [Zetex Semiconductors]

Página de inicio	http://www.diodes.com/

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11 / 14 page

Output Power Calculation

By making the above assumptions for inductance and

peak current the output power can be determined by:

Note:VOUT=output voltage + Schottky rectifier voltage

drop.

Where

TOFF

≅1.7us (internally set by ZXSC310)

and

Where

Operating frequency can be derived by:

Capacitor selection

For pulsed operation, as in the maximum battery life

solution, no capacitors are required at the output to the

LED. For rectified operation, as in the maximum

brightness solution, a small value ceramic capacitor is

required, typically 2.2uF.

Generally an input capacitor is not required, but a small

ceramic capacitor may be added to aid EMC, typically

470nF to 1uF.

(notes)

ZXSC310

PROVISIONAL ISSUE A - SEPTEMBER 2001

()

MIN

OUT

OFF

=−

−×

()

OFF

MIN

()

OFF

OUT

−

OUT

OFF

=−

()

ZXSC310 Datasheet(PDF) 11 Page - Zetex Semiconductors