SELC2010M 데이터 시트보기 (PDF) - MagnaChip Semiconductor

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SELC2010M

High current switch mode PWM LED Driver

MagnaChip Semiconductor 

3. Select Pole and Zero

1

f PO =

2π *

CC

Y * GEA

GEA = Gm-Amp Transconductance

Y = Attenuation − Ratio = VFPN

VO

f Z1

=

2π

1

* RC

* CC

Zero is set at the same location of output pole. In system design, if

ESR of output capacitor is large, Pole should be set at same

frequency in order to compensate The Zero of ESR.

f P1(OP)

=

2π

1

* RC

* COP

Preliminary – Subject to change without notice

OCT.15 2009. Version 0.3

MagnaChip Semiconductor Ltd.

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