ka2s1265 Fairchild Semiconductor, ka2s1265 Datasheet

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ka2s1265

Manufacturer Part Number
ka2s1265
Description
Fairchild Power Switch Sps
Manufacturer
Fairchild Semiconductor
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
KA2S1265
Manufacturer:
FAIRCHILD
Quantity:
12 500
Features
• Wide operatimg frequency range up to (150kHz)
• Pulse by pulse over current limiting
• Over load protection
• Over voltage protecton (Min. 23V)
• Internal thermal shutdown function
• Under voltage lockout
• Internal high voltage sense FET
• External sync terminal
• Latch up Mode
Internal Block Diagram
©2001 Fairchild Semiconductor Corporation
KA2S1265
Fairchild Power Switch(SPS)
#5 Sync
#3 V
#4 FB
CC
5V
2 A
7.5V
25V
32V
1mA
+
+
9V
+
2.5R
OVER VOLTAGE S/D
1R
6.4V
Thermal S/D
+
OSC
Vref
5V
0.1V
L.E.B
Good
logic
S
R
Description
The SPS product family is specially designed for an offline
SMPS with minimal external components. The SPS consist
of high voltage power SenseFET and current mode PWM
Controller IC. control IC features a trimmed oscillator, under
voltage lock-out, leading edge blanking, optimized gate turn-
on/turn-off driver, thermal shut down protection, over volt-
age 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 SPS can reduce total compo-
nent 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 Monitor power
supply.
Q
TO-3P-5L
1. DRAIN 2. GND 3. Vcc 4. FB 5. Sync
Power on reset
Internal
bias
S
R
1
Q
SFET
www.fairchildsemi.com
#1 DRAIN
#2 GND
Rev.1.0.1

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ka2s1265 Summary of contents

Page 1

... KA2S1265 Fairchild Power Switch(SPS) Features • Wide operatimg frequency range up to (150kHz) • Pulse by pulse over current limiting • Over load protection • Over voltage protecton (Min. 23V) • Internal thermal shutdown function • Under voltage lockout • Internal high voltage sense FET • ...

Page 2

... KA2S1265 Absolute Maximum Ratings Characteristic (1) Maximum Drain voltage Drain-Gate voltage (R = Gate-source (GND) voltage (2) Drain current pulsed (3) Single pulsed avalanche energy Continuous drain current (T = Continuous drain current (T =100 C) C Maximum Supply voltage Input voltage range Total power dissipation Operating ambient temperature ...

Page 3

... V =10V, I =12.0A =0.5BV DS DSS switching time are Qgs essentially independent of Qgd operating temperature) Min. Typ. Max. 650 - - - - 200 - 0. 2700 - - 300 - - =12. 140 (MOSFET - KA2S1265 Unit ...

Page 4

... KA2S1265 Electrical Charcteristics (CONTROL part) ( unless otherwise specified) Characteristic UVLO SECTION Start threshold voltage Stop operating voltage OSCILLATOR SECTION Initial accuracy Frequency change with temperature Maximum duty cycle FEEDBACK SECTION Feedback source current Shutdown Feedback voltage Shutdown delay current SYNC. & SOFT START SECTION ...

Page 5

... C Figure 6. Start Threshold Voltage Fig.2 Feedback Source Current 100 125 150 Temperature [ ] C Fig.4 Max Inductor Current 100 125 150 Temperature [ ] C Figure 4. Peak Current Limit Fig.6 Start Threshold Voltage - 100 125 150 Temperature [ ] C KA2S1265 5 ...

Page 6

... KA2S1265 Typical Performance Characteristics (These characteristic graphs are normalized Fig.7 Stop Threshold Voltage 1.15 1.1 1.05 V Vstop th(L) 1 0.95 0.9 0.85 - Temperature [ Figure 7. Stop Threshold Voltage Fig.9 Vcc Zener Voltage 1.2 1.15 1.1 1. 0.95 0.9 0.85 0.8 - Temperature [ Figure 9. V Zener Voltage CC Fig.11 Shutdown Delay Current 1.2 1.15 1.1 1.05 Idelay 1 0 ...

Page 7

... Typical Performance Characteristics (These characteristic graphs are normalized Fig.13 Soft Start Voltage 1.15 1.1 1.05 Vss 1 0.95 0.9 0.85 - Figure13. Soft Start Voltage (Continued) 2.5 2 1.5 Rdson ( ) 1 0.5 0 100 125 150 -25 Figure 14. Static Drain-Source on Resistance KA2S1265 Fig.14 Drain Source Turn-on Resistance 100 125 150 7 ...

Page 8

... KA2S1265 Package Dimensions 8 TO-3P-5L ...

Page 9

... Package Dimensions (Continued) TO-3P-5L (Forming) KA2S1265 9 ...

Page 10

... KA2S1265 Ordering Information Product Number Package KA2S1265-TU TO-3P-5L KA2S1265-YDTU TO-3P-5L(Forming Non Forming Type YDTU : Forming Type 10 Rating Operating Temperature 650V,12A - +85 C ...

Page 11

... KA2S1265 11 ...

Page 12

... KA2S1265 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. ...

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