ka5q1265rt Fairchild Semiconductor, ka5q1265rt Datasheet

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ka5q1265rt

Manufacturer Part Number
ka5q1265rt
Description
Product Family Is Specially Designed For An Off-line Smps
Manufacturer
Fairchild Semiconductor
Datasheet

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Preliminary
KA5Q1265RT
S P S
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, 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.
FEATURES
BLOCK DIAGRAM
1999 Fairchild Semiconductor Corporation
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

5
4
Vds
REF.
Ids
Sync.
REF.
+
TSD
150
o
+
C
Vz
Ifb
OVP
+
1.7R
PSR
REF.
OSC
R
Power-on
Reset
Burst mode
controller
S
R
Internal
LEB
Bias
+
Q
S
R
PWM
ORDERING INFORMATION
Q
_
Vfb offset
KA5Q1265RT
Vref
Device
Delay
500nS
+
UVLO
1. Drain 2. GND 3. V
TO -22 0F -5L
+
TO-220F-5L
Roff
Package
3
OCL
REF.
Ron
1
Rsense
CC
2
25 C to +85 C
4. FB 5. Sync
Topr ( C)
S P S
REV. B

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ka5q1265rt Summary of contents

Page 1

... Auto-restart mode BLOCK DIAGRAM  Sync. REF. – OVP 4 Ifb Ids Vz + – Vds REF. TSD o 150 C 1999 Fairchild Semiconductor Corporation ORDERING INFORMATION Device KA5Q1265RT + Internal Burst mode Vref – Bias PSR controller REF. OSC LEB PWM 1.7R – Vfb offset S Delay ...

Page 2

... Preliminary KA5Q1265RT ABSOLUTE MAXIMUM RATINGS Characteristic (1) Drain-source (GND) voltage Drain-Gate voltage (R = Gate-source (GND) voltage (2) Drain current pulsed (3) Single pulsed avalanche energy (4) Avalanche current Continuous drain current (T = Continuous drain current (T =100 C) C Supply voltage Analog input voltage range (F/B pin) ...

Page 3

... Preliminary KA5Q1265RT ELECTRICAL CHARACTERISTICS (SFET part) (Ta=25 C unless otherwise specified) Characteristic Drain-source breakdown voltage Zero gate voltage drain current Static drain-source on resistance (note) Forward transconductance Input capacitance Output capacitance Reverse transfer capacitance Turn on delay time Rise time Turn off delay time Fall time ...

Page 4

... Preliminary KA5Q1265RT ELECTRICAL CHARACTERISTICS (Control part) (Ta=25 C unless otherwise specified) Characteristic 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 UVLO SECTION Start threshold voltage ...

Page 5

... Preliminary KA5Q1265RT ELECTRICAL CHARACTERISTICS (Continued) (Ta=25 C unless otherwise specified) Characteristic SYNCHORONIZATION SECTION Burst Sync Threshold Voltage Burst Sync Hysteresis Voltage Normal Sync Threshold Voltage Normal Sync Hysteresis Voltage PRIMARY SIDE REGULATION SECTION Primary Reg. Threshold Voltage Primary Reg. Transconductance NOTE: 1. These parameters, although guaranteed, are not 100% tested in production 2 ...

Page 6

... KA5Q1265RT 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, ...

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