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PDF KA7540 Data sheet ( Hoja de datos )
| Número de pieza | KA7540 | |
| Descripción | Simple Dimming Ballast Control IC | |
| Fabricantes | Samsung | |
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Hay una vista previa y un enlace de descarga de KA7540 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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KA7540
Simple Dimming Ballast Control IC
www.fairchildsemi.com
Features
• Internal soft start
• No lamp protection
• Voltage controlled dimming
• Trimmed 1.5% internal bandgap reference
• Under voltage lock out with 1.8V of hysteresis
• Totem pole output with high state clamp
• Low start-up and operating current
• 8-pin DIP & 8-pin SOP
Applications
• Electronic Ballast
• Lighting Control System
• Half-bridge Drive Control System
Descriptions
The KA7540 provides simple and high performance
electronic ballast control functions. KA7540 is optimized for
electronic ballast requiring a minimum board area, reduced
component count and low power dissipation. Internal soft
start circuitry eliminates the need for an external soft start
PTC resistor. Voltage controlled dimming circuit is built into
the IC to control the lighting output in a wide range.
Protection circuitry has also been added to prevent switches
from burning out in no lamp condition. Output gate drive
circuit clamps power MOSFET gate voltage irrespective of
supply voltage.
8-DIP
1
8-SOP
1
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.1
1 page  
KA7540
Electrical Characteristics
Unless otherwise specified, for typical values Vcc=14V, Ta=25°C, For Min/Max values Ta is the operating ambient
temperature range with -25°C ≤ Ta ≤ 125°C and 14V≤ Vcc≤ 30V
Parameter
UNDER VOLTAGE LOCK OUT SECTION
Start threshold voltage
UVLO hysteresis
SUPPLY CURRENT SECTION
Start up supply current
Operating supply current
Dynamic operating supply current
REFERENCE SECTION
Reference voltage(Note1)
Line regulation(Note1)
Temperature stability of Vref(Note1)
OSCILLATOR SECTION
Operating frequency
Operating dead time
Soft start frequency
Soft start time current
Soft start dead time
Dimming frequency
OUTPUT SECTION
Rising time (Note2)
Falling time (Note2)
Maximum output voltage
Output voltage with UVLO activated
NO LAMP PROTECTION SECTION
No lamp detect voltage
Symbol
VTH(st)
HY(st)
IST
ICC
IDCC
Vref
∆Vref 1
∆Vref 2
fos
tod
fss
ISS
tsd
fd
tr
tf
Vomax(o)
Vomin(o)
Vnd
Conditions
VCC increasing
-
VCC<VTH(st),
Vcc=14V
Output not switching
50kHz, CI=1nF
Iref=0mA, Vcc=14V
14V≤VCC≤25V
-25≤Ta≤125°C,
Vcc=14V
VSS=3V, CT=470pF
VSS=3V, Vcc=14V
VSS=0V, CT=470pF
VSS=0V
VSS=0V, Vcc=14V
Vss=5V, Vdim=1V
CI=1nF
CI=1nF
VCC=20V
VCC=5V, IO=100µA
-
Min.
11.5
1.3
-
-
-
1.95
-
-
44
2.4
56
17
1.8
58
-
-
12
-
1.9
Typ.
12.5
1.8
0.2
6
7
2
0.1
15
50
2.9
65
25
2.3
72
120
50
15
-
2
Max.
13.5
2.3
0.3
10
14
2.05
10
-
56
3.4
74
33
2.8
86
200
100
18
1
2.1
Unit
V
V
mA
mA
mA
V
mV
mV
kHz
µs
kHz
µA
µs
kHz
ns
ns
V
V
V
Notes :
1. This parameter is not tested in production but tested in wafer.
2. This parameter, although guaranteed, is not 100% tested in production.
5
5 Page 
Component List
Part number
R1
R2
R3, 12
R4
R5, 10, 11
R6
R7
R8
R9
R14
R15, 16
R17, 18
R19
C1, 2
C3, 4
C5
C6, 10
C7
C8
C9
C11
C12
C13
C14
C15, 16
C17, 18, 19, 20
C21
Q1, 2, 3
D1, 2, 3, 4
D5
D6
D7, 8
ZD1
L1
L2
L3, 4
T1
F1
TNR
NTC
Value
2.7MΩ
18kΩ
150kΩ
22kΩ
47Ω
3.3Ω
0.2Ω
1.2MΩ
103
180kΩ
330kΩ
680kΩ
15kΩ
150nF, 275vac
2200pF, 3000V
0.22µF, 630V
47µF, 35V
0.33µF
1nF, 25V
47µF, 450V
6.8µF, 35V
180pF, 25V
0.1µF, 25V
1nF, 630V
4700pF, 1000V
6800pF, 630V
0.22µF, 25V
500V, 3.6A
1000V, 1A
1000V, 1A
75V, 150mA
600V, 1A
15V, 1W
45mH
590µH (62T:5T)
3.1mH (120T)
1.2mH(30T:60T)
250V, 3A
470V
10Ω
Note
1/4W
1/4W
1W
1/4W
1/4W
1/4W
1W
1/4W
Variable resistor
1/4W
1/4W
1/4W
1/4W
Box-Cap
Y-Cap
Miller-Cap
Electrolytic
MLCC
Ceramic
Electrolytic
Electrolytic
Ceramic
Ceramic
Miller-Cap
Miller-Cap
Miller-Cap
Ceramic
FQPF6N50
1N4007
UF4007
1N4148
1N4937
1N4744
Line Filter
EI3026
EI2820
EE1614
Fuse
471
10D09
KA7540
Manufacturer
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11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet KA7540.PDF ] | |
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