ka1m0280r Fairchild Semiconductor, ka1m0280r Datasheet

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ka1m0280r

Manufacturer Part Number
ka1m0280r
Description
Smps Controller
Manufacturer
Fairchild Semiconductor
Datasheet

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BLOCK DIAGRAM
SPS
SPS
The SPS product family is specially designed for an off-line
SMPS with minimal external components. The SPS consist of
high voltage power SenseFET and current mode PWM IC.
Included PWM controller features integrated fixed oscillator,
under voltage lock out, leading edge blanking, optimized gate
turn-on/turn-off driver, thermal shut down protection, over
voltage protection, and temperature compensated precision
current sources for loop compensation and fault protection
circuitry. Compared to discrete MOSFET and controller or
RCC switching converter solution, a SPS 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 design in either
a flyback converter or a forward converter.
FEATURES
1999 Fairchild Semiconductor Corporation
Precision fixed operating frequency (70kHz)
Pulse by pulse over current limiting
Over Current Protection
Over Voltage Protection (Min. 23V)
Internal thermal shutdown function
Under voltage lockout
Internal high voltage sense FET
Auto restart
#3 V
#4 FB
CC
5 A
7.5V
25V
32V
+
+
1mA
2.5R
OVER VOLTAGE S/D
1R
9V
Thermal S/D
+
OSC
Vref
5V
0.1V
L.E.B
Good
logic
S
R
Q
ORDERING INFORMATION
KA1M0280R
Power on reset
Internal
bias
Device
S
R
Q
TO-220F-4L
Package
TO-220F-4L
SFET
1.GND 2. DRAIN 3. V
Operating Temperature
#2 DRAIN
#1 GND
25 C to +85 C
CC
KA1M0280R
4. FB
Rev. B
1

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ka1m0280r Summary of contents

Page 1

... Fairchild Semiconductor Corporation ORDERING INFORMATION Device KA1M0280R 5V Internal Vref bias Good logic OSC 1mA R L.E Thermal S/D Power on reset OVER VOLTAGE S/D KA1M0280R TO-220F-4L 1.GND 2. DRAIN Package Operating Temperature TO-220F- + DRAIN SFET #1 GND Rev ...

Page 2

... KA1M0280R ABSOLUTE MAXIMUM RATINGS Characteristic (1) Drain-source (GND) voltage Drain-Gate voltage (R = Gate-source (GND) voltage (2) Drain current pulsed Single pulsed avalanche energy (4) Avalanche current Continuous drain current (T = Continuous drain current (T =100 C) C Supply voltage Analog input voltage range Total power dissipation ...

Page 3

... V =0.5BV DD DSS (MOSFET switching tr time are essentially td(off) independent of operating temperature =10V, I =2.0A =0.5BV DS DSS switching time are Qgs essentially independent of Qgd operating temperature) 2% KA1M0280R Min. Typ. Max. 8000 = 200 5.6 7.0 1.5 2.5 250 =2. (MOSFET 15 20 Unit ...

Page 4

... KA1M0280R ELECTRICAL CHARACTERISTICS (Control part) (Ta=25 C unless otherwise specified) Characteristic REFERENCE SECTION (1) Output voltage (1)(2) Temperature Stability OSCILLATOR SECTION Initial accuracy Frequency change with temperature PWM SECTION Maximum duty cycle FEEDBACK SECTION Feedback source current Shutdown delay current OVER CURRENT PROTECTION SECTION Over current protection ...

Page 5

... SPS TYPICAL PERFORMANCE CHARACTERISTICS (These characteristic graphs are normalized at Ta=25 C) Figure 1. Operating Frequency Figure 3. Operating Current Figure 5. Start up Current KA1M0280R Figure 2. Feedback Source Current Figure 4. Max. Inductor Current Figure 6. Start Threshold Voltage 5 ...

Page 6

... KA1M0280R TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (These characteristic graphs are normalized at Ta=25 C) Figure 7. Stop Threshold Voltage Figure 9. V Zener Voltage CC Figure 11. Shutdown Delay Current 6 Figure 8. Maximum Duty Cycle Figure 10. Shutdown Feedback Voltage Figure 12. Over Voltage Protection SPS ...

Page 7

... SPS TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (These characteristic grahps are normalized at Ta=25 C) Figure 13. Soft Start Voltage Figure 14. Drain Source Turn-on Resistance KA1M0280R 7 ...

Page 8

... TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended exhaustive list of all such trademarks. ACEx™ CoolFET™ CROSSVOLT™ CMOS FACT™ FACT Quiet Series™ ® FAST FASTr™ ...

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