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부품번호 | 3S1265R 기능 |
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기능 | KA3S1265R | ||
제조업체 | Fairchild Semiconductor | ||
로고 | |||
전체 12 페이지수
KA3S1265R/KA3S1265RF/
KA3S1265RD
Fairchild Power Switch(FPS)
www.fairchildsemi.com
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
• Auto Restart Mode
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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 IC.
Included 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
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,
weight and at the same time increase efficiency,
productivity, and system reliability. It has a basic platform
well suited for cost-effective C-TV power supply.
TO-3P-5L
TO-3PF-5L
Internal Block Diagram
11
1. DRAIN 2. GND 3. Vcc 4. FB 5. Sync
#3 VCC
#5 Sync
#4 FB
32V
−
5V +
6.4V
2µA 1mA 2.5R
9V 1R
+
5V Internal
Vref bias
Good
logic
OSC
−
+
S
Q
R
L.E.B
0.1V
7.5V −
+ Thermal S/D
25V −
OVER VOLTAGE S/D
S
Q
R
Power on reset
SFET
#1 DRAIN
#2 GND
©2001 Fairchild Semiconductor Corporation
Rev.1.0.2
KA3S1265R/KA3S1265RF/KA3S1265RD
Electrical Charcteristics (CONTROL part)
(Ta = 25°C unless otherwise specified)
Characteristic
Symbol
Test condition
Min. Typ. Max. Unit
UVLO SECTION
Start threshold voltage
Stop threshold voltage
OSCILLATOR SECTION
Initial accuracy
Frequency change with temperature(2)
Maximum duty cycle
FEEDBACK SECTION
Feedback source current
Shutdown feedback voltage
Shutdown delay current
www.DataSheeStY4NUC.c. o&mSOFT START SECTION
VSTART
VSTOP
-
After turn on
14 15 16
9 10 11
V
V
FOSC
∆F/∆T
Dmax
Ta=25°C
−25°C ≤ Ta ≤ +85°C
-
18 20 22 kHz
- ±5 ±10 %
92 95 98 %
IFB
VSD
Idelay
Ta=25°C, Vfb=GND
0.8 1 1.2 mA
- 6.9 7.5 8.1 V
Ta=25°C, 5V ≤ Vfb ≤ VSD 1.4 1.8 2.2 µA
Soft start voltage
VSS VFB=2V
4.7
Soft start current
Sync threshold voltage
Sync threshold voltage(ON)(3)
Sync threshold voltage(OFF)(3)
ISS
VSYTH
VSYTH(ON)
VSYTH(OFF)
Sync & S/S=GND
KA3S1265R,KA3S1265RF
KA3S1265RD
0.8
6.0
6.86
5.92
REFERENCE SECTION
Output voltage (1)
Temperature stability (1)(2)
Vref
Vref/∆T
Ta=25°C
−25°C ≤ Ta ≤ +85°C
4.80
-
CURRENT LIMIT (SELF-PROTECTION) SECTION
Peak Current Limit
IOVER Max. inductor current
7.04
PROTECTION SECTION
Thermal shutdown temperature (Tj) (1)
TSD
- 140
TOTAL DEVICE SECTION
Start Up current
Operating supply current
(Control Part Only)
ISTART
IOP
VCC=14V
Ta=25°C
0.1
6
Vcc Zener voltage
VZ ICC=20mA
30
5.0
-
6.4
7.23
6.23
5.00
0.3
8.00
160
0.3
12
32.5
5.4
-
6.8
7.60
6.54
V
mA
V
5.20 V
0.6 mV/°C
8.96 A
- °C
0.55 mA
18 mA
35 V
Note:
1. These parameters, although guaranteed, are not 100% tested in production
2. These parameters, although guaranteed, are tested in EDS(water test) process
3.The amplitude of the sync. pulse is recommended to be between 2V and 3V for stable sync. function.
4
4페이지 KA3S1265R/KA3S1265RF/KA3S1265RD
Typical Performance Characteristics (Continued)
(These characteristic graphs are normalized at Ta = 25°C)
1.15
1.1
1.05
Vss 1
0.95
0.9
0.85
-25
Fig.13 Soft Start Voltage
0 25 50 75 100 125 150
Fig.14 Drain Source Turn-on
Res is tance
2.5
2
1.5
RRDdSs(oonn) 1
0.5
0
-25 0 25 50 75 100 125 150
Figure13. Soft Start Voltage
Figure 14. Static Drain-Source on Resistance
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부품번호 | 상세설명 및 기능 | 제조사 |
3S1265R | KA3S1265R | Fairchild Semiconductor |
3S1265RF | KA3S1265RF | Fairchild Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |