ZXSC310 datasheet(11/14 Pages) ZETEX

tên linh kiện	ZXSC310

Giải thích chi tiết về linh kiện	LED DRIVER SOLUTION FOR LCD BACKLIGHTING

PDF	14 Pages

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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 bảng dữ liệu(PDF) 11 Page - Zetex Semiconductors