KA7540 Просмотр технического описания (PDF) - Samsung
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KA7540 Datasheet PDF : 14 Pages
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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
Symbol
Conditions
Min. Typ. Max. Unit
UNDER VOLTAGE LOCK OUT SECTION
Start threshold voltage
VTH(st) VCC increasing
11.5 12.5 13.5 V
UVLO hysteresis
HY(st)
-
1.3
1.8 2.3
V
SUPPLY CURRENT SECTION
Start up supply current
IST
VCC<VTH(st),
Vcc=14V
-
0.2 0.3 mA
Operating supply current
ICC Output not switching -
6
10 mA
Dynamic operating supply current
IDCC 50kHz, CI=1nF
-
7
14 mA
REFERENCE SECTION
Reference voltage(Note1)
Line regulation(Note1)
Temperature stability of Vref(Note1)
Vref Iref=0mA, Vcc=14V 1.95
2
2.05 V
∆Vref 1 14V≤VCC≤25V
-
0.1
10 mV
∆Vref 2
-25≤Ta≤125°C,
Vcc=14V
-
15
-
mV
OSCILLATOR SECTION
Operating frequency
Operating dead time
fos
VSS=3V, CT=470pF 44
50
56 kHz
tod
VSS=3V, Vcc=14V
2.4
2.9
3.4
µs
Soft start frequency
fss
VSS=0V, CT=470pF 56
65
74 kHz
Soft start time current
ISS
VSS=0V
17
25
33
µA
Soft start dead time
tsd
VSS=0V, Vcc=14V
1.8
2.3
2.8
µs
Dimming frequency
fd
Vss=5V, Vdim=1V 58
72
86 kHz
OUTPUT SECTION
Rising time (Note2)
Falling time (Note2)
tr
CI=1nF
tf
CI=1nF
-
120 200 ns
-
50 100 ns
Maximum output voltage
Output voltage with UVLO activated
Vomax(o) VCC=20V
12
15
18
V
Vomin(o) VCC=5V, IO=100µA
-
-
1
V
NO LAMP PROTECTION SECTION
No lamp detect voltage
Vnd
-
1.9
2
2.1
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.
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