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5S0765C Schematic ( PDF Datasheet ) - Fairchild Semiconductor

Teilenummer 5S0765C
Beschreibung LA5S0765C
Hersteller Fairchild Semiconductor
Logo Fairchild Semiconductor Logo 




Gesamt 16 Seiten
5S0765C Datasheet, Funktion
www.DataSheet4U.com
www.fairchildsemi.com
KA5S-SERIES
KA5S0765C/KA5S0965/KA5S12656/KA5S1265
Fairchild Power Switch(FPS)
Features
• Wide Operating Frequency Range Up to 150kHz
• Lowest Cost SMPS Solution
• Lowest External Components
• Low Start-up Current (Max:170µA)
• Low Operating Current (Max:12mA)
• Internal High Voltage SenseFET
• Over Voltage Protection With Latch Mode (Min23V)
• Over Load Protection With Latch Mode
• Over Current Protection With Latch Mode
• Internal Thermal Protection With Latch Mode
• Pulse By Pulse Over Current Limiting
• Under Voltage Lockout With Hysteresis
• External Sync. Terminal
Internal Block Diagram
TO-220-5L
1
TO-3P-5L
1
1. Drain 2. Gnd 3. VCC 4. FeedBack 5. Sync.
VCC
3
VCC UVLO
+
-
15/9V
Vref
Soft Start
& Sync
5
VREF
Feedback 4
0.95mA
4µA
-
Vth.sy
+
7V
6V
2.5V
VREF
VCC
R
2.5V
OSC CLK
-
+
Voffset
+
-
Bias
VREF UVLO
SQ
R
OLP
(Vfb=7.5V)
TSD
(Tj=160°C)
OVP
(VCC=25V)
1µs Window
Open Circuit
S
Q
R
Shutdown Latch
OCP
(VS=1.1V)
Power-on Reset
(VCC=6.5V)
Drain
1
SenseFET
VS
Rsense
2 GND
©2003 Fairchild Semiconductor Corporation
Rev.1.0.5






5S0765C Datasheet, Funktion
www.DataSheet4U.com
KA5S-SERIES
Electrical Characteristics (Control Part) (Continued)
(VCC=16V, Tamb = 25°C unless otherwise specified)
Parameter
Symbol
Conditions
UVLO SECTION
Start Threshold Voltage
VSTART VFB=GND
Stop Threshold Voltage
VSTOP VFB=GND
OSCILLATOR SECTION
Initial Frequency
FOSC
-
Voltage Stability
FSTABLE 12V VCC 23V
Temperature Stability (Note2)
FOSC -25°C ≤ Τa85°C
Maximum Duty Cycle
DMAX
-
Minimum Duty Cycle
DMIN
-
FEEDBACK SECTION
Feedback Source Current
IFB VFB=GND
Shutdown Feedback Voltage
VSD
VFB 6.9V
Shutdown Delay Current
IDELAY VFB=5V
SYNC. & SOFTSTART SECTION
Softstart Voltage
VSS VFB=2V
Softstart Current
ISS VSS=0V
Sync High Threshold Voltage(Note3) VSYNCH VCC=16V , VFB=5V
Sync Low Threshold Voltage(Note3)
VSYNCL VCC=16V , VFB=5V
CURRENT LIMIT(SELF-PROTECTION)SECTION
KA5S0765C
Peak Current Limit (Note4)
IOVER
KA5S0965
KA5S12656
KA5S1265
PROTECTION SECTION
Over Voltage Protection
VOVP
VCC 24V
Over Current Latch voltage(Note3)
VOCL
-
Thermal Shutdown Tempature(Note2)
TSD
-
TOTAL DEVICE SECTION
Start Up Current
ISTART VFB=GND, VCC=14V
IOP VFB=GND, VCC=16V
Operating Supply Current(Note1)
IOP(MIN) VFB=GND, VCC=12V
IOP(MAX) VFB=GND, VCC=30V
Note:
1. These parameters are the current flowing in the control IC.
2. These parameters, although guaranteed, are not 100% tested in mass production
3. These parameters, although guaranteed, are tested in EDS(wafer test) process
4. These parameters are indicated Inductor current.
Min. Typ. Max. Unit
14 15 16
8 9 10
V
V
18 20 22 kHz
0 1 3%
0 ±5 ±10 %
92 95 98 %
- - 0%
0.7 0.9 1.1 mA
6.9 7.5 8.1 V
3.0 4.0 5.0 µA
4.7
0.75
-
-
5.0
0.95
7.0
6.0
5.3
1.15
-
-
V
mA
V
V
3.52 4.0 4.48
5.28 6.0 6.72
5.28 6.0 6.72
7.04 8.0 8.96
A
23 25 28
0.9 1.0 1.1
140 160 -
V
V
°C
- 0.1 0.17 mA
- 7 12 mA
6

6 Page









5S0765C pdf, datenblatt
www.DataSheet4U.com
KA5S-SERIES
Package Dimensions (Continued)
TO-220-5L
12

12 Page





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