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KA7540 Datasheet(PDF) 2 Page - Samsung semiconductor

Part # KA7540
Description  Simple Dimming Ballast Control IC
PDF  14 Pages
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Manufacturer  SAMSUNG [Samsung semiconductor]
Direct Link  http://www.samsung.com/Products/Semiconductor
Logo SAMSUNG - Samsung semiconductor

KA7540 Datasheet(HTML) 2 Page - Samsung semiconductor

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KA7540
KA7540
KA7540
KA7540
2
2
2
2
Internal Block Diagram
Internal Block Diagram
Internal Block Diagram
Internal Block Diagram
IC Characteristics
IC Characteristics
IC Characteristics
IC Characteristics
Parameter
Parameter
Parameter
Parameter
KA7540
KA7540
KA7540
KA7540
Initial soft start frequency
1.33
× normal operating frequency
Voltage controlled dimming
1 ~ 10V
CS
6.8
µF
1
2
3
4
5
6
7
8
Ct
Vdim
Ldet
25
µA
180pF
−
+
Vref
IS
Ict
2V Ref
Internal
bias
+
−
+
+
+
IC
1.8V
12.5V
F.D
UVLO
UVLO
Frequency
divider
from VCS
kVref
−
+
3pF
20k
Ω
80k
Ω
Vd
100
µA
Shut down signal
40k
Ω
5pF
2V
+
−
Id
VCC
8Ict
latch
Q
IS = 17
µA × (Vref − VSS) / Vref
Id = 25
µA × (Vref − Vd) / Vref
VCC
OUT 1
OUT 2
GND
Oscillator
VZ
17
µA
VZ
25
µA
VZ



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