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| TLD5098EL Datasheet, PDF (28/39 Pages) Infineon Technologies AG – DC/DC Boost, Buck-Boost, SEPIC controller | |||
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VREF
[V]
typ. 300mV
TLD5098EL
Analog Dimming
Figure 16
100 mV
1.6V
Analog Dimming Feature Enabled
I LED
=
VSET â 0.1V
5 * RFB
Analog Dimming
Disabled
I LED
= VREF
RFB
Voltage VSET versus LED current
VSET
[V]
ILED
VREF
RFB
FBL
7
IFBL
FBH
6
IFBH
R2
R1
VREF_offset
+
-
Feedback Voltage
Error Amplifier
VOUT
Vint
ISET
n*ISET
VBandgap = 1.6V
++
-
ISET
SET
10
VSET
R3
COMP
8
CCOMP
RCOMP
100mV
GND
12
Figure 17 Concept Drawing Analog Dimming
Datasheet
28
Rev. 1.0, 2010-10-13
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