SPS
KA2S0680
1
SPS
The SPS product family is specially designed for an off line
SMPS with minimal external component. The SPS 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, and temperature compensated precision current
source 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 monitor power
supply.
FEATURES
Wide operating frequency range up to 150kHz
Pulse 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
External sync terminal
Latch up Mode
ORDERING INFORMATION
Device
Package
Rating
Topr (
C)
KA2S0680
TO-3P-5L
800V, 6A
-
25
C to +85
C
TO-3P-5L
1.DRAIN 2. GND 3. V
CC
4. FB 5. Sync
BLOCK DIAGRAM
#3 V
CC
32V
2
A
5V
2.5R
1R
1mA
0.1V
+
-
OVER VOLTAGE S/D
+
-
7.5V
25V
Thermal S/D
S
R
Q
Power on reset
+
-
L.E.B
S
R
Q
OSC
5V
Vref
Internal
bias
Good
logic
SFET
#1 DRAIN
#2 GND
#4 FB
#5 Sync
9V
+
-
6.4V
Rev. B
1999 Fairchild Semiconductor Corporation
KA2S0680
SPS
2
ABSOLUTE MAXIMUM RATINGS
NOTES:
1.
Tj=25
C to 150
C
2.
Repetitive rating: Pulse width limited by maximum junction temperature
3.
L=24mH, V
DD
=50V, R
G
=25
, starting Tj=25
C
4.
L=13uH, V
DD
=310V, Tj=25
C
Characteristic
Symbol
Value
Unit
Drain-source (GND) voltage
(1)
V
DSS
800
V
Drain-Gate voltage (R
GS
=1M
)
V
DGR
800
V
Gate-source (GND) voltage
V
GS
30
V
Drain current pulsed
(2)
I
DM
24.0
A
DC
Single pulsed avalanche energy
(3)
E
AS
455
mJ
Avalanche current
(4)
I
AS
20
A
Continuous drain current (T
C
=25
C)
I
D
6.0
A
DC
Continuous drain current (T
C
=100
C)
I
D
4.0
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)
150
W
Derating
1.21
W/
C
Operating temperature
T
OPR
-
25 to +85
C
Storage temperature
T
STG
-
55 to +150
C
SPS
KA2S0680
3
NOTE: Pulse test: Pulse width
300
S, duty cycle
2%
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
A
800
-
-
V
Zero gate voltage drain current
I
DSS
V
DS
=Max., Rating, V
GS
=0V
-
-
50
A
V
DS
=0.8Max., Rating,
V
GS
=0V, T
C
=125
C
-
-
200
A
Static drain-source on resistance
(note)
R
DS(ON)
V
GS
=10V, I
D
=4.0A
-
1.6
2.0
Forward transconductance
(note)
gfs
V
DS
=15V, I
D
=4.0A
1.5
2.5
-
mho
Input capacitance
Ciss
V
GS
=0V, V
DS
=25V,
f=1MHz
-
1600
-
pF
Output capacitance
Coss
-
140
-
Reverse transfer capacitance
Crss
-
42
-
Turn on delay time
td(on)
V
DD
=0.5BV
DSS
, I
D
=6.0A
(MOSFET switching
time are essentially
independent of
operating temperature)
-
60
-
nS
Rise time
tr
-
150
-
Turn off delay time
td(off)
-
300
-
Fall time
tf
-
130
-
Total gate charge
(gate-source+gate-drain)
Qg
V
GS
=10V, I
D
=6.0A,
V
DS
=0.5BV
DSS
(MOSFET
switching time are
essentially independent of
operating temperature)
-
70
-
nC
Gate-source charge
Qgs
-
16
-
Gate-drain (Miller) charge
Qgd
-
27
-
KA2S0680
SPS
4
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.
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/
T
-
25
C
Ta
+85
C
-
0.3
0.6
mV/
C
OSCILLATOR SECTION
Initial accuracy
F
OSC
Ta=25
C
18
20
22
kHz
Frequency change with temperature
(2)
F/
T
-
25
C
Ta
+85
C
-
5
10
%
Sync threshold voltage
(3)
V
SYTH
Vfb=5V
6.0
6.4
6.8
V
PWM SECTION
Maximum duty cycle
Dmax
-
92
95
98
%
FEEDBACK SECTION
Feedback source current
I
FB
Ta=25
C, Vfb=GND
0.7
0.9
1.1
mA
Shutdown delay current
Idelay
Ta=25
C, 5V
Vfb
V
SD
1.4
1.8
2.2
A
OVER CURRENT PROTECTION SECTION
Over current protection
I
L
(max)
Max. inductor current
3.52
4.00
4.48
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
0.55
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
SOFT START SECTION
Soft start current
I
SS
Sync & S/S=GND
0.8
1.0
1.2
mA
Soft start voltage
V
SS
V
FB
=2V
4.7
5.0
5.3
V
SPS
KA2S0680
5
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
KA2S0680
SPS
6
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(These characteristic graphs are normalized at Ta=25
C)
Figure 7. Stop Threshold Voltage
Figure 8. Maximum Duty Cycle
Figure 9. V
CC
Zener Voltage
Figure 10. Shutdown Feedback Voltage
Figure 11. Shutdown Delay Current
Figure 12. Over Voltage Protection
SPS
KA2S0680
7
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(These characteristic grahps are normalized at Ta=25
C)
Figure 13. Soft Start Voltage
Figure 14. Drain Source Turn-on Resistance
TRADEMARKS
ACExTM
CoolFETTM
CROSSVOLTTM
E
2
CMOS
TM
FACTTM
FACT Quiet SeriesTM
FAST
FASTrTM
GTOTM
HiSeCTM
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is
not intended to be an exhaustive list of all such trademarks.
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 FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
ISOPLANARTM
MICROWIRETM
POPTM
PowerTrenchTM
QSTM
Quiet SeriesTM
SuperSOTTM-3
SuperSOTTM-6
SuperSOTTM-8
TinyLogicTM
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, or (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 significant injury to the
user.
2. A critical component is 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.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Preliminary
No Identification Needed
Obsolete
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
Formative or
In Design
First Production
Full Production
Not In Production
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.
UHCTM
VCXTM
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