KA5Q0740RTTU FAIRCHILD [Fairchild Semiconductor], KA5Q0740RTTU Datasheet

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KA5Q0740RTTU

Manufacturer Part Number
KA5Q0740RTTU
Description
Fairchild Power Switch(FPS)
Manufacturer
FAIRCHILD [Fairchild Semiconductor]
Datasheet
1.KA5Q0740RTTU.pdf (12 pages)
Features
• Quasi Resonant Converter Controller
• Internal Burst Mode Controller for Stand-by Mode
• Pulse by Pulse Current Limiting
• Over Current Latch Protection
• Over Voltage Protection (Vsync: Min. 11V)
• Internal Thermal Shutdown Function
• Under Voltage Lockout
• Internal High Voltage Sense FET
• Auto-Restart Mode
Internal Block Diagram
©2003 Fairchild Semiconductor Corporation
KA5Q0740RT
Fairchild Power Switch(FPS)
FEEDBACK
FEEDBACK
FEEDBACK
FEEDBACK
SYNC
SYNC
SYNC
SYNC
5
4
Sync
7.5V
12V
Idelay
-
-
+
+
Normal Mode
Burst Mode
VREF
3.5V/1.25V
4.6V/2.6V
Ifb
OLP
OVP
1V
Power
Reset
on
-
+
-
+
+
-
+
-
S
R
2.5R
32V 1%
Q
+ -
R
OSC
11V on
12V off
+
-
+
-
Q
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) consists of a
high voltage power SenseFET and a current mode PWM IC.
The integrated PWM controller includes the fixed oscillator,
the under voltage lock out, the leading edge blanking, the
optimized gate turn-on/turn-off driver, the thermal shut down
protection, the over voltage protection, and the temperature
compensated precision current sources for loop compensation
and fault protection circuitry. Compared to a discrete
MOSFET and a controller or a RCC switching converter
solutions, a Fairchild Power Switch(FPS) can reduce the total
number of components, design size, and weight, so it will
improve efficiency, productivity, and system reliability. It has
a basic platform well suited for cost-effective design in a
quasi-resonant converter as a C-TV power supply.
R
S
Offset
TO-220F-5L
1. Drain 2. GND 3. V
4. Feedback 5. Sync
Internal
450ns
Power on Reset
BIAS
LEB
(VCC=6.5V)
S
R
QB
VREF
Delay
80ns
Shut Down
Shut Down
Shut Down
Shut Down
Thermal
Thermal
Thermal
Thermal
OCL
CC
15V/9V
UVLO
-
+
+
-
VCC
VCC
VCC
VCC
1V
www.fairchildsemi.com
3
Rsense
Ro
n
Rof
Roff
f
Ron
DRAIN
DRAIN
DRAIN
DRAIN
1
2
SOURCE
SOURCE
SOURCE
SOURCE
Rev.1.0.4

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KA5Q0740RTTU Summary of contents

Page 1

KA5Q0740RT Fairchild Power Switch(FPS) Features • Quasi Resonant Converter Controller • Internal Burst Mode Controller for Stand-by Mode • Pulse by Pulse Current Limiting • Over Current Latch Protection • Over Voltage Protection (Vsync: Min. 11V) • Internal Thermal Shutdown ...

Page 2

KA5Q0740RT Absolute Maximum Ratings (Ta=25 C, unless otherwise specified) Parameter Drain-Gate Voltage (R = Gate-Source (GND) Voltage (2) Drain Current Pulsed Single Pulsed Avalanch Current Continuous Drain Current (Tc = 25°C) Continuous Drain Current (T =100 C) C ...

Page 3

Electrical Characteristics (SFET Part) (Ta=25 C unless otherwise specified) Parameter Drain-Source Breakdown Voltage Zero Gate Voltage Drain Current Static Drain-source on Resistance Input Capacitance Output Capacitance Reverse Transfer Capacitance Turn on Delay Time Rise Time Turn Off Delay Time Fall ...

Page 4

KA5Q0740RT Electrical Characteristics (Ta=25 C unless otherwise specified) Parameter UVLO SECTION Start Threshold Voltage Stop Threshold Voltage OSCILLATOR SECTION Initial Frequency Voltage Stability Temperature Stability (Note2) Maximum Duty Cycle Minimum Duty Cycle FEEDBACK SECTION Feedback Source Current Shutdown Feedback Voltage ...

Page 5

Electrical Characteristics (Ta=25 C unless otherwise specified) Parameter SYNC SECTION Normal Sync High Threshold Voltage Normal Sync Low Threshold Voltage Burst Sync High Threshold Voltage Burst Sync Low Threshold Voltage BURST MODE SECTION Burst mode Low Threshold Voltage Burst mode ...

Page 6

KA5Q0740RT Typical Performance Characteristics 1.10 1.05 1.00 0.95 0.90 0.85 -25 ℃ 0 ℃ 25 ℃ 50 ℃ Temp.(ºC) Figure 1. Start Voltage 1.08 1.01 0.94 0.87 0.80 -25 ℃ 0 ℃ 25 ℃ 50 ℃ Temp.(ºC) Figure 3. Stand ...

Page 7

Typical Performance Characteristics 1.50 1.20 0.90 0.60 0.30 0.00 -25 ℃ 0 ℃ 25 ℃ 50 ℃ Temp.(ºC) Figure 7. Feedback Offset Voltage 1.10 1.06 1.02 0.98 0.94 0.90 -25 ℃ 0 ℃ 25 ℃ 50 ℃ Temp.(ºC) Figure 9. ...

Page 8

KA5Q0740RT Typical Performance Characteristics 1.10 1.06 1.02 0.98 0.94 0.90 -25 ℃ 0 ℃ 25 ℃ 50 ℃ Temp.(ºC) Figure 13. Burst Mode Low Threshold Voltage 1.10 1.06 1.02 0.98 0.94 0.90 -25 ℃ 0 ℃ 25 ℃ 50 ℃ ...

Page 9

Typical Performance Characteristics 1.10 1.06 1.02 0.98 0.94 0.90 -25 ℃ 0 ℃ 25 ℃ 50 ℃ Temp.(ºC) Figure 19. Peak Current Limit 1.10 1.06 1.02 0.98 0.94 0.90 -25 ℃ 0 ℃ 25 ℃ 50 ℃ Temp.(ºC) Figure 21. ...

Page 10

KA5Q0740RT Package Dimensions 10 TO-220F-5L ...

Page 11

Package Dimensions (Continued) TO-220F-5L(Forming) KA5Q0740RT 11 ...

Page 12

... KA5Q0740RT Ordering Information Product Number KA5Q0740RTTU KA5Q0740RTYDTU TO-220F-5L(Forming Non Forming Type YDTU : Forming Type 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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