ka1m0280.pdf

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KA1M0280R SPS
SPS
KA1M0280R
SPS
TO-220F-4L
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, 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.
1.GND 2. DRAIN 3. V CC 4. FB
FEATURES
ORDERING INFORMATION
• Precision fixed operating frequency (70kHz)
• 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
• Auto restart
Device
Package
Operating Temperature
KA1M0280R TO-220F-4L
- 25 C to +85 C
BLOCK DIAGRAM
#3 V CC
3 2V
5V
Vr e f
Internal
bias
#2 DRAIN
SFET
Good
logic
OSC
9V
S
R
5 m A
1mA
Q
#4 FB
-
L.E.B
2.5R
1R
+
+
-
0.1V
7.5V
S
R
Q
#1 GND
+
-
Thermal S/D
25V
Power on reset
OVER VOLTAGE S/D
Rev. B
1
1999 Fairchild Semiconductor Corporation
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KA1M0280R
SPS
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Value
Unit
Drain-source (GND) voltage (1)
V DSS
800
V
Drain-Gate voltage (R GS =1M W )
V DGR
800
V
Gate-source (GND) voltage
V GS
– 30
V
Drain current pulsed (2)
I DM
8.0
A DC
Single pulsed avalanche energy (3)
E AS
90
mJ
Avalanche current (4)
I AS
-
A
Continuous drain current (T C =25 C)
I D
2.0
A DC
Continuous drain current (T C =100 C)
I D
1.3
A DC
Supply voltage
V CC
30
V
Analog input voltage range
V FB
- 0.3 to V SD
V
Total power dissipation
P D (watt H/S)
35
W
Derating
0.28
W/ C
Operating temperature
T OPR
- 25 to +85
C
Storage temperature
T STG
- 55 to +150
C
NOTES:
1. Tj=25 C to 150 C
2. Repetitive rating: Pulse width limited by maximum junction temperature
3. L=51mH, V DD =50V, R G =25 W , starting Tj=25 C
2
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SPS
KA1M0280R
ELECTRICAL CHARACTERISTICS (SFET part)
(Ta=25 C unless otherwise specified)
Characteristic
Symbol
Test condition
Min. Typ. Max. Unit
Drain-source breakdown voltage
BV DSS
V GS =0V, I D =50 m A
8000
-
-
V
Zero gate voltage drain current
I DSS
V DS =Max., Rating, V GS =0V
-
-
50
m A
V DS =0.8Max., Rating,
V GS =0V, T C =125 C
-
-
200
m A
Static drain-source on resistance (note)
R DS(ON)
V GS =10V, I D =1.0A
-
5.6
7.0
W
Forward transconductance (note)
gfs
V DS =50V, I D =1.0A
1.5
2.5
-
mho
Input capacitance
Ciss
V GS =0V, V DS =25V,
f=1MHz
-
250
-
pF
Output capacitance
Coss
-
52
-
Reverse transfer capacitance
Crss
-
25
-
Turn on delay time
td(on)
V DD =0.5BV DSS , I D =2.0A
(MOSFET switching
time are essentially
independent of
operating temperature)
-
21
-
nS
Rise time
tr
-
28
-
Turn off delay time
td(off)
-
77
-
Fall time
tf
-
24
-
Total gate charge
(gate-source+gate-drain)
Qg
V GS =10V, I D =2.0A,
V DS =0.5BV DSS (MOSFET
switching time are
essentially independent of
operating temperature)
-
-
60
nC
Gate-source charge
Qgs
-
15
-
Gate-drain (Miller) charge
Qgd
-
20
-
NOTE: Pulse test: Pulse width £ 300 m S, duty cycle £ 2%
3
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KA1M0280R
SPS
ELECTRICAL CHARACTERISTICS (Control part)
(Ta=25 C unless otherwise specified)
Characteristic
Symbol
Test condition
Min. Typ. Max.
Unit
REFERENCE SECTION
Output voltage (1)
Vref
Ta=25 C
4.80 5.00 5.20
V
Temperature Stability (1)(2)
Vref/ D T
- 25 C £ Ta £ +85 C
-
0.3
0.6 mV/ C
OSCILLATOR SECTION
Initial accuracy
F OSC
Ta=25 C
61
67
73
kHz
Frequency change with temperature (2)
D F/ D T
- 25 C £ Ta £ +85 C
-
– 5
– 10
%
PWM SECTION
Maximum duty cycle
Dmax
-
74
77
80
%
FEEDBACK SECTION
Feedback source current
I FB
Ta=25 C, 0V £ Vfb £ 3V
0.7
0.9
1.1
mA
Shutdown delay current
Idelay
Ta=25 C, 5V £ Vfb £ V SD
4.0
5.0
6.0
m A
OVER CURRENT PROTECTION SECTION
Over current protection
I L (max)
Max. inductor current
1.05
1.2
1.35
A
UVLO SECTION
Start threshold voltage
Vth(H)
-
14
15
16
V
Minimum operating voltage
Vth(L)
After turn on
9
10
11
V
TOTAL STANDBY CURRENT SECTION
Start current
I ST
V CC =14V
0.1
0.3
0.45
mA
Operating supply current
(control part only)
I OPR
Ta=25 C
6
12
18
mA
V CC zener voltage
V Z
I CC =20mA
30
32.5
35
V
SHUTDOWN SECTION
Shutdown Feedback voltage
V SD
-
6.9
7.5
8.1
V
Thermal shutdown temperature (Tj) (1)
T SD
-
140
160
-
C
Over voltage protection voltage
V OVP
-
23
25
28
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
4
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SPS
KA1M0280R
TYPICAL PERFORMANCE CHARACTERISTICS
(These characteristic graphs are normalized at Ta=25 C)
Figure 1. Operating Frequency
Figure 2. Feedback Source Current
Figure 3. Operating Current
Figure 4. Max. Inductor Current
Figure 5. Start up Current
Figure 6. Start Threshold Voltage
5
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