KA7541 Просмотр технического описания (PDF) - Fairchild Semiconductor
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KA7541 Datasheet PDF : 14 Pages
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KA7541
Electrical Characteristics
Unless otherwise specified, for typical values Vcc=14V, Ta=25oC, For Min/Max values Ta is the operating ambient
temperature range with -25oC ≤ Ta ≤ 125oC and 11V ≤ VCC ≤ 30V
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
UNDER VOLTAGE LOCK OUT SECTION
Start threshold voltage
VTH(st) VCC increasing
8.5 9.5 10.5 V
UVLO hysteresis
HY(st)
-
1.3 1.8 2.3 V
SUPPLY CURRENT SECTION
Start up supply current
IST
VCC<VTH(st)
- 0.15 0.25 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
Vref
Iref=0mA, Vcc=14V
1.95 2 2.05 V
Line regulation
∆Vref 1 14V≤VCC≤25V
- 0.1 10 mV
Temperature stability of Vref
∆Vref 2 -25≤Ta≤125°C, Vcc=14V
-
15
- mV
OSCILLATOR SECTION
Operating frequency
fos
VSS=3V, CT=470pF
44 50 56 KHz
Operating dead time
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 dead time
tsd
VSS=0V, Vcc=14V
1.8 2.3 2.8 µs
OUTPUT SECTION
Rising time (note1)
Falling time (note1)
tr
CI=1nF, Vcc=12V
tf
CI=1nF, Vcc=12V
- 120 200 ns
-
50 100 ns
Maximum output voltage
Vomax(o) VCC=20V
12 15 18 V
Output voltage with UVLO activated
Vomin(o) VCC=5V, IO=100µA
-
-
1
V
NO LAMP PROTECTION SECTION
No lamp detect voltage
Vnd
-
1.9 2 2.1 V
Note:
1. These parameters, although guaranteed, are not 100% tested in production.
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