KA7577D Fairchild, KA7577D Datasheet

no-image

KA7577D

Manufacturer Part Number
KA7577D
Description
SMPS Controller
Manufacturer
Fairchild
Datasheet
Features
• Low Stand-By Current
• Pulse by Pulse Current Limiting
• Over Voltage Protection
• Over Current Protection
• Integrated Thermal Shutdown Circuit
• Output Driver Current of
• Totem pole Output
Internal Block Diagram
©2000 Fairchild Semiconductor International
KA7577
SMPS Controller
2A
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.
20-SOP
16-DIP
1
1
www.fairchildsemi.com
Rev. 5.0

Related parts for KA7577D

KA7577D Summary of contents

Page 1

... Integrated Thermal Shutdown Circuit • Output Driver Current of 2A • Totem pole Output Internal Block Diagram ©2000 Fairchild Semiconductor International 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 ...

Page 2

KA7577 Absolute Maximum Ratings Parameter Supply Voltage Collector Supply Voltage Output DC Current Output Peak Voltage V Terminal Voltage F V Terminal Voltage ON/OFF Current Limiting (-) Terminal Voltage Current Limiting (+) Terminal Voltage Over Voltage Protection Terminal Voltage Detection ...

Page 3

Electrical Characteristics (V = 18V unless otherwise specified Parameter POWER SUPPLY VOLTAGE AND CURRENT SECTION Power Supply Voltage Operation Start-Up Voltage Operation Stop Voltage Difference Voltage Between Operation Start and Stop Stand-By Current Operating ...

Page 4

KA7577 Electrical Characteristics (V =18V, T =25 C, unless otherwise specified Parameter OVER VOLTAGE PROTECTION SECTION OVP Terminal Threshold Voltage OVP Terminal Input Current OVP Cancellation Voltage Difference Voltage Between Operating Stop and OVP Cancellation TIMER SECTION Timer ...

Page 5

Electrical Characteristics (V =18V unless otherwise specified Parameter V SECTION F Duty Ratio of CLM Operating V Voltage at Timer Operating Start F V Terminal Input Current F OUTPUT SECTION Low Output Voltage ...

Page 6

KA7577 Mechanical Dimensions Package 6.40 0.20 0.252 0.008 #1 #8 7.62 0.300 6 16-DIP #16 #9 3.25 0.20 0.128 0.008 5.08 MAX 0.200 Dimensions in millimeters 0.38 MIN 0.014 3.30 0.30 0.130 0.012 ...

Page 7

Mechanical Dimensions Package #1 #10 0.60 0.20 0.024 0.008 (Continued) 20-SOP MIN 1.70 0.10 0.067 0.004 #20 #11 2.00 7.80 0.30 0.079 0.307 0.012 5.40 0.20 0.213 0.008 7.62 0.300 Dimensions in millimeters 0.05 0.002 MAX KA7577 7 ...

Page 8

... KA7577 Ordering Information Product Number Package KA7577 16-DIP KA7577D 20-SOP 8 Operating Temperature -25 ~ +85 C -25 ~ +85 C ...

Page 9

KA7577 9 ...

Page 10

... DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR INTERNATIONAL. As used herein: 1 ...

Related keywords