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PDF KA7577 Data sheet ( Hoja de datos )
| Número de pieza | KA7577 | |
| Descripción | SMPS Controller | |
| Fabricantes | Fairchild | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de KA7577 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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KA7577
SMPS Controller
Features
• Low Stand-By Current
• Pulse by Pulse Current Limiting
• Over Voltage Protection
• Over Current Protection
• Integrated Thermal Shutdown Circuit
• Output Driver Current of ± 2A
• Totem pole Output
Internal Block Diagram
www.fairchildsemi.com
Description
KA7577 is fixed frequency PWM controller and specially
designed for SMPS to get regulated DC voltage from AC
power supply. This integrated circuit has so fast rise and fall
output pulse that it can directly drive power transistor as well
as power MOSFET. This device features high speed and
high sensitive current limiting. Protection circuitry include
current limiting function against short and over current at
secondary side, owing to the integrated timertype-protection
circuit.
16-DIP
1
20-SOP
1
©2000 Fairchild Semiconductor International
Rev. 5.0
1 page  
Electrical Characteristics
(VCC=18V, TA = 25°C , unless otherwise specified)
Parameter
VF SECTION
Duty Ratio of CLM Operating
VF Voltage at Timer Operating Start
VF Terminal Input Current
OUTPUT SECTION
Low Output Voltage
High Output Voltage
Rise Time
Fall Time
THERMAL PROTECTION SECTION
Thermal protection Operating
Temperature
Symbol
Conditions
K
V(VF)
I(VF)
VF = 0.2V
Max On Duty/
Min Off Duty
-
-
VOL1
VOL2
VOL3
VOL4
VOH1
VOH2
TR
TF
VCC = 18V, IO = 10mA
VCC = 18V, IO = 100mA
VCC = 5V, IO = 1mA
VCC = 5V, IO = 100mA
VCC = 18V, IO = -10mA
VCC = 18V, IO = -100mA
No load
No load
T(TP)
-
KA7577
Min. Typ. Max. Unit
11 13.7 22
-
2.7 3.0 3.3 V
- 2 6 µA
- 0.05
- 0.7
- 0.69
- 1.3
16.0 16.5
15.5 16.0
- 50
- 35
0.4
1.4
1.0
2.0
-
-
-
-
V
V
V
V
V
V
ns
ns
120 140 160 °C
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet KA7577.PDF ] | |
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