FAIRCHILD KA3S0880RB

www.fairchildsemi.com
KA3S0880RB/KA3S0880RFB
Fairchild Power Switch(SPS)
Features
Description
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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 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 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 C-TV power supply.
Wide operating frequency range up to 150KHz
Pulse by pulse over current limiting
Over current protection
Over voltage protection (Min. 23V)
Internal thermal shutdown function
Under voltage lockout
Internal high voltage sense FET
External sync terminal
Auto Restart Mode
TO-3PF-5L
TO-3P-5L
1
1
1. DRAIN 2. GND 3. VCC 4. FB 5. Sync
Internal Block Diagram
#3 VCC
32V
5V
Vref
Internal
bias
Good
logic
−
#5 Sync
OSC
+
5V
S
6.4V
R
−
#4 FB
2µA
1mA 2.5R
1R
9V
+
25V
L.E.B
−
+
−
Q
0.1V
+
7.5V
#1 DRAIN
SFET
S
Thermal S/D
R
Q
#2 GND
Power on reset
OVER VOLTAGE S/D
Rev.1.0.1
©2001 Fairchild Semiconductor Corporation
KA3S0880RB/KA3S0880RFB
Absolute Maximum Ratings
Parameter
Maximum Drain voltage
(1)
Drain-Gate voltage (RGS=1MΩ)
Gate-source (GND) voltage
Drain current pulsed
(2)
Single pulsed avalanche energy
Avalanche
(3)
current (4)
Symbol
Value
Unit
VD,MAX
800
V
VDGR
800
V
VGS
±30
V
IDM
32.0
ADC
EAS
810
mJ
IAS
25
A
Continuous drain current (TC=25°C)
ID
8.0
ADC
Continuous drain current (TC=100°C)
ID
5.6
ADC
VCC,MAX
30
V
VFB
−0.3 to VSD
V
Maximum supply voltage
Input voltage range
Total power dissipation
Operating ambient temperature
Storage temperature
PD
190
W
Derating
1.54
W/°C
TA
−25 to +85
°C
TSTG
−55 to +150
°C
Notes:
1. Tj=25°C to 150°C
2. Repetitive rating: Pulse width limited by maximum junction temperature
3. L=24mH, starting Tj=25°C
4. L=13µH, starting Tj=25°C
2
KA3S0880RB/KA3S0880RFB
Electrical Characteristics (SFET part)
(Ta=25°C unless otherwise specified)
Parameter
Drain-source breakdown voltage
Symbol
Condition
Min.
Typ.
Max.
Unit
BVDSS
VGS=0V, ID=50µA
800
-
-
V
VDS=Max., Rating,
VGS=0V
-
-
50
µA
VDS=0.8Max., Rating,
VGS=0V, TC=125°C
-
-
200
µA
RDS(ON)
VGS=10V, ID=5.0A
-
1.2
1.5
Ω
gfs
VDS=15V, ID=5.0A
1.5
2.5
-
S
-
2460
-
VGS=0V, VDS=25V,
f=1MHz
-
210
-
-
64
-
-
-
90
-
95
200
-
150
450
-
60
150
-
-
150
-
20
-
-
70
-
Zero gate voltage drain current
Static drain-source on resistance (note)
Forward transconductance
IDSS
(note)
Input capacitance
Ciss
Output capacitance
Coss
Reverse transfer capacitance
Crss
Turn on delay time
td(on)
Rise time
Turn off delay time
tr
td(off)
Fall time
tf
Total gate charge
(gate-source+gate-drain)
Qg
Gate-source charge
Qgs
Gate-drain (Miller) charge
Qgd
VDD=0.5BVDSS, ID=8.0A
(MOSFET switching
time are essentially
independent of
operating temperature)
VGS=10V, ID=8.0A,
VDS=0.5BVDSS (MOSFET
switching time are
essentially independent of
operating temperature)
pF
nS
nC
Note:
Pulse test: Pulse width ≤ 300µS, duty cycle ≤ 2%
1S = --R
3
KA3S0880RB/KA3S0880RFB
Electrical Characteristics (Control part)
(Ta=25°C unless otherwise specified)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Start threshold voltage
VSTART
-
14
15
16
V
Stop threshold voltage
VSTOP
After turn on
9
10
11
V
FOSC
Ta=25°C
18
20
22
kHz
∆F/∆T
−25°C≤Ta≤+85°C
-
±5
±10
%
92
95
98
%
0.7
0.9
1.1
mA
UVLO SECTION
OSCILLATOR SECTION
Initial accuracy
Frequency change with temperature
(2)
Maximum duty cycle
Dmax
-
FEEDBACK SECTION
Ta=25°C, Vfb=GND
Feedback source current
IFB
Shutdown Feedback voltage
VSD
-
6.9
7.5
8.1
V
Idelay
Ta=25°C, 5V≤Vfb≤VSD
1.4
1.8
2.2
µA
VSS
VFB=2V
4.7
5.0
5.3
V
ISS
Sync & S/S=GND
0.8
1.0
1.2
mA
Vfb=5V
6.0
6.4
6.8
V
Ta=25°C
4.80
5.00
5.20
V
-
0.3
0.6
mV/°C
4.40
5.00
5.60
A
Shutdown delay current
SYNC. & SOFT START SECTION
Soft start voltage
Soft start current
Sync threshold voltage
(3)
VSYTH
REFERENCE SECTION
Output voltage (1)
Temperature Stability
Vref
(1)(2)
Vref/∆T
−25°C≤Ta≤+85°C
CURRENT LIMIT (SELF-PROTECTION) SECTION
Peak Current Limit
IOVER
Max. inductor current
PROTECTION SECTION
Thermal shutdown temperature (Tj) (1)
Over voltage protection voltage
TSD
-
140
160
-
°C
VOVP
-
23
25
28
V
TOTAL DEVICE SECTION
Start Up current
ISTART
VCC=14V
0.1
0.3
0.55
mA
Operating supply current
(control part only)
IOP
Ta=25°C
6
12
18
mA
VCC zener voltage
VZ
ICC=20mA
30
32.5
35
V
Notes:
1. These parameters, although guaranteed, are not 100% tested in production
2. These parameters, although guaranteed, are tested in EDS (wafer test) process
3. The amplitude of the sync. pulse is recommended to be between 2V and 3V for stable sync. function.
4
KA3S0880RB/KA3S0880RFB
Typical Performance Characteristics
(These characteristic graphs are normalized at Ta=25°C)
Fig.2 Feedback Source Current
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
1.2
1.15
1.1
1.05
Ifb 1
0.95
0.9
0.85
0.8
-25
0
25
Temperature [°C]
Figure 1. Operating Frequency
Fig.3 Operating Current
1.2
1.15
1.1
1.05
Iop 1
0.95
0.9
0.85
0.8
-25
100
125 150
Fig.4 Max Inductor Current
1.1
1.05
IIpeak
over 1
0.95
0.9
0.85
0
25
50
75
100 125 150
0.8
-25
0
25
50
75
100 125 150
Temperature [°C]
Figure 3. Operating Supply Current
Figure 4. Peak Current Limit
Fig.5 Start up Current
Fig.6 Start Threshold Voltage
1.15
1.1
1.3
1.05
1.1
Istart
Vstart 1
0.9
0.95
0.7
0.5
-25
75
Figure 2. Feedback Source Current
Temperature [°C]
1.5
50
Temperature [°C]
0.9
0
25
50
75
100 125 150
Temperature [°C]
Figure 5. Start up Current
0.85
-25
0
25
50
75
100 125 150
Temperature [°C]
Figure 6. Start Threshold Voltage
5
KA3S0880RB/KA3S0880RFB
Typical Performance Characteristics (Continued)
(These characteristic graphs are normalized at Ta=25°C)
Fig.7 Stop Threshold Voltage
1.15
Fig.8 Maximum Duty Cycle
1.15
1.1
1.1
1.05
1.05
Vth(H) 1
Vstop
Dmax 1
0.95
0.95
0.9
0.9
0.85
-25
0
25
50
75
100 125 150
0.85
-25
0
Temperature [°C]
Figure 7. Stop Threshold Voltage
50
75
100 125 150
Figure 8. Maximum Duty Cycle
Fig.10 Shutdown Feedback Voltage
Fig.9 Vcc Zener Voltage
1.15
1.2
1.15
1.1
1.05
Vz 1
0.95
0.9
0.85
0.8
-25
1.1
1.05
Vsd 1
0.95
0.9
0
25
50
75
100 125 150
0.85
-25
0
Temperature [°C]
50
75
100 125 150
Figure 10. Shutdown Feedback Voltage
Fig.11 Shutdown Delay Current
1.2
1.15
1.1
1.05
Idelay 1
0.95
0.9
0.85
0.8
-25
25
Temperature [°C]
Figure 9. VCC Zener Voltage
Fig.12 Over Voltage Protection
1.15
1.1
1.05
Vovp 1
0.95
0.9
0
25
50
75
100 125 150
Temperature [°C]
Figure 11. Shutdown Delay Current
6
25
Temperature [°C]
0.85
-25
0
25
50
75
100 125 150
Temperature [°C]
Figure 12. Over Voltage Protection
KA3S0880RB/KA3S0880RFB
Typical Performance Characteristics (Continued)
(These characteristic grahps are normalized at Ta=25°C)
Fig.13 Soft Start Voltage
Fig.14 Drain Source Turn-on
Resistance
1.15
2.5
1.1
1.05
2
Vss 1
1.5
0.95
( )1
Rdson
0.9
0.5
0.85
-25
0
25
50
75
100 125 150
Temperature [°C]
Figure 13. Soft Start Voltage
0
-25
0
25
50
75
100 125 150
Temperature [°C]
Figure 14. Static Drain-Source on Resistance
7
KA3S0880RB/KA3S0880RFB
Package Dimensions
TO-3P-5L
8
KA3S0880RB/KA3S0880RFB
Package Dimensions (Continued)
TO-3P-5L (Forming)
9
KA3S0880RB/KA3S0880RFB
Package Dimensions
TO-3PF-5L
10
KA3S0880RB/KA3S0880RFB
Package Dimensions (Continued)
TO-3PF-5L (Forming)
11
KA3S0880RB/KA3S0880RFB
Ordering Information
Product Number
KA3S0880RB-TU
KA3S0880RB-YDTU
KA3S0880RFB-TU
KA3S0880RFB-YDTU
TU : Non Forming Type
YDTU : Forming Type
12
Package
TO-3P-5L
TO-3P-5L(Forming)
TO-3PF-5L
TO-3PF-5L(Forming)
Topr (°°C)
−25°C to +85°C
−25°C to +85°C
KA3S0880RB/KA3S0880RFB
13
KA3S0880RB/KA3S0880RFB
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
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,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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 2001 Fairchild Semiconductor Corporation