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3S0680RFB Schematic ( PDF Datasheet ) - Fairchild Semiconductor

Teilenummer 3S0680RFB
Beschreibung KA3S0680RF
Hersteller Fairchild Semiconductor
Logo Fairchild Semiconductor Logo 




Gesamt 12 Seiten
3S0680RFB Datasheet, Funktion
www.fairchildsemi.com
KA3S0680RB/KA3S0680RFB
Fairchild Power Switch(FPS)
Features
• Wide operatimg frequency range up to (150kHz)
• Pulse by pulse over current limiting
• Over load protection
• Over voltage protecton (Min. 23V)
www.DataSheet4U.coImnternal thermal shutdown function
• Under voltage lockout
• Internal high voltage sense FET
• External sync terminal
• Auto Restart Mode
Description
The Fairchild Power Switch(FPS) product family is specially
designed for an off line SMPS with minimal external
components. The Fairchild Power Switch(FPS) consist of
high voltage power SenseFET and current mode PWM
controller IC. controller IC features a trimmed oscillator,
under voltage lock out, leading edge blanking, optimized
gate turn-on/turn-off driver, thermal shut down protection,
over voltage protection, temperature compensated precision
current sources for loop compensation and fault protection
circuit. compared to discrete MOSFET and controller or
RCC switching converter solution, a Fairchild Power
Switch(FPS) can reduce total component count, design size,
weight and at the same time increase & efficiency,
productivity, and system reliability. It has a basic platform
well suited for cost effective C-TV power supply.
TO-3P-5L
TO-3PF-5L
11
1.DRAIN 2.GND 3.VCC 4.FB 5.Sync
Internal Block Diagram
#3 VCC
#5 Sync
#4 FB
32V
5V +
6.4V
2µA 1mA 2.5R
9V 1R
+
5V Internal
Vref bias
Good
logic
OSC
+
S
Q
R
L.E.B
0.1V
7.5V
+
Thermal S/D
S
Q
R
25V
OVER VOLTAGE S/D
Power on reset
©2001 Fairchild Semiconductor Corporation
SFET
#1 DRAIN
#2 GND
Rev.1.0.2






3S0680RFB Datasheet, Funktion
KA3S0680RB/KA3S0680RFB
Typical Performance Characteristics (continued)
(These characteristic graphs are normalized at Ta = 25°C)
www.DataSheet4U.com
Fig.7 Stop Threshold Voltage
1.15
1.1
1.05
Vsthto(Hp) 1
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Temperature [°C]
Figure 7. Stop Threshold Voltage
1.2
1.15
1.1
1.05
Vz 1
0.95
0.9
0.85
0.8
-25
Fig.9 Vcc Zener Voltage
0 25 50 75 100 125 150
Temperature [°C]
Figure 9. VCC Zener Voltage
Fig.11 Shutdown Delay Current
1.2
1.15
1.1
1.05
Idelay 1
0.95
0.9
0.85
0.8
-25 0 25 50 75 100 125
Temperature [°C]
150
Figure 11. Shutdown Delay Current
Fig.8 Maximum Duty Cycle
1.15
1.1
1.05
Dmax 1
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Temperature [°C]
Figure 8. Maximum Duty Cycle
Fig.10 Shutdown Feedback Voltage
1.15
1.1
1.05
Vsd 1
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Temperature [°C]
Figure 10. Shutdown Feedback Voltage
Fig.12 Over Voltage Protection
1.15
1.1
1.05
Vovp 1
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Temperature [°C]
Figure 12. Over Voltage Protection
6

6 Page









3S0680RFB pdf, datenblatt
KA3S0680RB/KA3S0680RFB
Ordering Information
Product Number
KA3S0680RB-TU
Package
TO-3P-5L
KA3S0680RB-YDTU TO-3P-5L(Forming)
KA3S0680RFB-TU
TO-3PF-5L
KA3S0680RFB-YDTU TO-3PF-5L(Forming)
TU : Non Forming Type
YDTU : Forming Type
Operating Temperature
-25°C to +85°C
-25°C to +85°C
www.DataSheet4U.com
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
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
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
10/17/01 0.0m 001
Stock#DSxxxxxxxx
2001 Fairchild Semiconductor Corporation

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