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KA5Q Scheda tecnica(PDF) 1 Page - Fairchild Semiconductor

Il numero della parte KA5Q
Spiegazioni elettronici  Fairchild Power Switch(FPS)
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Produttore elettronici  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

KA5Q Scheda tecnica(HTML) 1 Page - Fairchild Semiconductor

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©2003 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev.1.0.3
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
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.
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, 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, and weight and at the same time
increase & efficiency, productivity, and system reliability. It has
a basic platform well suited for cost-effective design in quasi
resonant converter as C-TV power supply.
TO-220F-5L
1. Drain 2. GND 3. VCC 4. FB 5. Sync
TO-3PF-5L
1
1
Internal Block Diagram
-
+
Rsense
11V on
12V off
3
1
2
4
VREF
Internal
BIAS
S
Q
R
LEB
450ns
S
QB
R
Ro
n
Rof
f
Power
on
Reset
OVP
OLP
7.5V
-
+
12V
Sync
-
+
-
+
UVLO
15V/9V
5
Burst Mode
3.5V/1.25V
SYNC
SYNC
SYNC
SYNC
-
+
R
2.5R
-
+
-
+
Offset
Thermal
Thermal
Thermal
Thermal
Shut Down
Shut Down
Shut Down
Shut Down
S
Q
R
Power on Reset
(VCC=6.5V)
Delay
80ns
1V
-
+
OCL
1V
FEEDBACK
FEEDBACK
FEEDBACK
FEEDBACK
VCC
VCC
VCC
VCC
DRAIN
DRAIN
DRAIN
DRAIN
SOURCE
SOURCE
SOURCE
SOURCE
Normal Mode
4.6V/2.6V
OSC
-
+
-
+
Idelay
Ifb
VREF
32V 1%
+
-
Ron
Roff
KA5Q-SERIES
KA5Q0765RT/KA5Q12656RT/KA5Q1265RF/
KA5Q1565RF
Fairchild Power Switch(FPS)


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