KA7577 반도체 회로 부품 판매점
SMPS Controller
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 Fairchild |
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
KA7577
Absolute Maximum Ratings
Parameter
Symbol
Value
Supply Voltage
Collector Supply Voltage
Output DC Current
Output Peak Voltage
VF Terminal Voltage
VCC
VC
IO(DC)
IOPK
V(VF)
31
31
± 0.5
±2
31
VON/OFF Terminal Voltage
V(ON/OFF)
31
Current Limiting (-) Terminal Voltage
Current Limiting (+) Terminal Voltage
V(CLM - )
V(CLM +)
- 4 ~+4
- 0.3 ~+4
Over Voltage Protection Terminal Voltage
V(OVP)
31
Detection Terminal Voltage (Note 1)
V(DET)
6
Detection Terminal Sink Current (Note 1)
ISINK(DET)
5
Feedback Terminal Voltage
V(FB)
0 - 10
Timer ON Terminal Source Current
ISOURCE(T-ON)
-1
Timer OFF Terminal Source Current
ISOURCE(T-OFF)
-1
Power Dissipation
PD 1.5
hermal Derating Factor
KTD 12
Operating Temperature Range
Storage Temperature Range
TOPR
TSTG
- 25 ~ +85
- 40 ~ +125
Junction Temperature
TJ 150
Note:
1. This terminal has the constant voltage characteristics of 6-8V, when current is supplied from out side.
The maximum allowable voltage is 6V when the constant voltage is applied to this terminal.
And maximum allowable current is 5mA, it is recommended to use current limiting resistor.
Unit
V
V
A
A
V
V
V
V
V
V
mA
V
mA
mA
W
mW/°C
°C
°C
°C
2
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제조업체: Fairchild
( fairchild )
KA7577 controller
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[ KA7577.PDF ]
[ KA7577 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
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