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PDF 1L0380RB Data sheet ( Hoja de datos )

Número de pieza 1L0380RB
Descripción KA1L0380RB
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



Total 12 Páginas
		
1L0380RB Hoja de datos, Descripción, Manual
www.fairchildsemi.com
KA1L0380B/KA1L0380RB/KA1M0380RB/
KA1H0380RB
Fairchild Power Switch(SPS)
Features
• Precision fixed operating frequency
KA1L0380B/KA1L0380RB (50KHz)
KA1M0380RB (67KHz)
KA1H0380RB (100KHz)
www.DataSheet4U.coPmulse by pulse over current limiting
• Over load protection
• Over voltage protection (Min. 23V)
• Internal thermal shutdown function
• Under voltage lockout
• Internal high voltage sense FET
• Auto restart (KA1L0380RB/KA1M0380RB/KA1H0380RB)
Description
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 control-
ler 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 volt-
age protection, temperature compensated precision current
sources for loop compensation and fault protection circuit.
Compared to discrete MOSFET and controller or RCC switch-
ing 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.
TO-220F-4L
Internal Block Diagram
1
1. GND 2. DRAIN 3. VCC 4. FB
#3 VCC
#4 FB
32V 5V Internal
Vref bias
Good
logic
5µA
7.5V
25V
9V
1mA
2.5R
1R
+
OSC
+
S
Q
R
L.E.B
0.1V
+ Thermal S/D
OVER VOLTAGE S/D
S
Q
R
Power on reset
©2000 Fairchild Semiconductor International
SFET
#2 DRAIN
#1 GND
Rev. .5.0

1 page

1L0380RB pdf
Typical Performance Characteristics
(These characteristic graphs are normalized at Ta=25°C)
KA1L0380B/KA1L0380RB/KA1M0380RB/KA1H0380RB
www.DataSheet4U.com
Fig.1 Operating Frequency
1.2
1.15
1.1
1.05
Fosc 1
0.95
0.9
0.85
0.8
-25 0 25 50 75 100 125 150
Temperature [°C]
Figure 1. Operating Frequency
1.2
1.15
1.1
1.05
IIOoPpR 1
0.95
0.9
0.85
0.8
-25
Fig.3 Operating Current
0 25 50 75 100 125 150
Temperature [°C]
Figure 3. Operating Current
1.5
1.3
IISs tTart1.1
0.9
0.7
0.5
-25
Fig.5 Start up Current
0 25 50 75 100 125 150
Temperature [°C]
Figure 5. Start up Current
Fig.2 Feedback Source Current
1.2
1.15
1.1
1.05
Ifb 1
0.95
0.9
0.85
0.8
-25 0 25 50 75 100 125
Temperature [°C]
150
Figure 2. Feedback Source Current
1.1
1.05
ILIp(MeAaXk) 1
0.95
0.9
0.85
0.8
-25
Fig.4 Max Inductor Current
0 25 50 75 100 125 150
Temperature [°C]
Figure 4. Max. Inductor Current
Fig.6 Start Threshold Voltage
1.15
1.1
1.05
Vtsht(aHr)t 1
0.95
0.9
0.85
-25 0
25 50 75 100 125 150
Temperature [°C]
Figure 6. Start Threshold Voltage
5

5 Page

1L0380RB arduino
www.DataSheet4U.com
KA1L0380B/KA1L0380RB/KA1M0380RB/KA1H0380RB
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