KA7552A View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
View to exact match
KA7552A Datasheet PDF : 6 Pages
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KA7552A/KA7553A
Absolute Maximum Ratings
Parameter
Supply voltage
Output current
Input voltage at overcurrent detection pin
Input voltage at FB pin
Input current at CS pin
Total power dissipation (Ta = 25°C)
Operating temperature
Storage temperature range
Junction temperature
Electrical Characteristics
Symbol
VCC
IO
VIN(IS)
VIN(FB)
IIN(CS)
PD
TOPR
TSTG
Tj
Value
30
±1.5
-0.3 to 4
4
2
800
-25 to 85
-65 to 150
+125
Unit
V
A
V
V
mA
mW
°C
°C
°C
(VCC = 18V, FOSC = 135kHz, TA = 25°C, unless otherwise specified)
Parameter
Symbol
OSCILLATOR SECTION
Initial accuracy
FOSC
Frequency variation 1
Frequency variation 2(Note1)
∆F/∆V
∆F/∆V
Ramp high voltage
VRH
Ramp low voltage
VRL
Amplitude
VOSC
PULSE WIDTH MODULATION SECTION
Input threshold voltage(pin2)
VTH(FBD)
Input threshold voltage(pin2)(Note1)
VTH(FB1) (KA7552)
VTH(FB2) (KA7553)
Max. duty cycle
D(Max1) (KA7552)
D(Max2) (KA7553)
Source current(pin2)
ISOURCE(FB)
OVERCURRENT LIMIT SECTION
Input threshold voltage
VTH(IS)
Source current(pin3)
Deley time(Note1)
ISOURCE(IS)
TD
SOFT START SECTION
Charging current
ICHG
Input threshold voltage(pin8)
VTH(CSO)
Input threshold voltage(pin8)(Note1)
VTH(CS1) (KA7552)
VTH(CS2) (KA7553)
LATCH MODE SHUTDOWN CIRCUIT SECTION
Sink current(pin8)
ISINK(CS)
Shutdown threshold voltage
VTH(SD,CS)
OVERLOAD SHUTDOWN SECTION
Shutdown threshold voltage
VTH(SD,FB)
Conditions
Min. Typ. Max. Unit
CT = 360pF, TJ = 25°C
VCC = 10V to 30V
TA = 25°C to 85°C
CT = 360pF, TJ = 25°C
CT = 360pF, TJ = 25°C
VPIN7, peak to peak
125 135 145 kHz
- ±1 ±3 %
- ±1.5 - %
2.80 3.08 3.30 V
0.6 0.9 1.2 V
1.80 2.18 2.50 V
Duty cycle = 0%
Duty cycle = Dmax 1
Duty cycle = Dmax 2
-
-
VPIN2 = 0V
0.6 0.75 0.95 V
2.1 2.3 2.6 V
1.6 1.8 2.1 V
66 70 74 %
43 46 49 %
-660 -800 -960 uA
-
VPIN3 = 0V
-
0.21 0.24 0.27 V
-300 -200 -100 uA
- 150 - ns
VPIN8 = 0V
-
Duty cycle = Dmax 1
Duty cycle = Dmax 2
-15 -10 -5 uA
0.7 0.9 1.1 V
2.2 2.4 2.6 V
1.7 1.9 2.1 V
VPIN8 = 6V, VPIN2 = 1V 25 45 65 uA
-
6.7 7.2 7.7 V
-
2.6 2.8 3.1 V
2
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