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ZHCS2000 データシート(PDF) 11 Page - Diodes Incorporated

部品番号 ZHCS2000
部品情報  LED DRIVER SOLUTION FOR LCD BACKLIGHTING
PDF  16 Pages
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メーカー  DIODES [Diodes Incorporated]
ホームページ  http://www.diodes.com
Logo DIODES - Diodes Incorporated

ZHCS2000 データシート(HTML) 11 Page - Diodes Incorporated

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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
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
ISSUE 3 - SEPTEMBER 2007
11
SEMICO NDUC TORS
()
II
VV
T
L
MIN
PK
OUT
IN
OFF
=−
−×
()
F
TT
ON
OFF
=
+
1
I
II
AV
PK
MIN
=
+
2
()
T
TV
V
V
ON
OFF
OUT
IN
IN
=
−
PV
V
I
T
TT
OUT
OUT
IN
AV
OFF
ON
OFF
=−
×
×
+
()



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