SPS KA2S0880
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 tr-immed oscillator, under
voltage lock out, leading edge blanking, optimized gate turnon/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.
TO-3P-5L
1.DRAIN 2. GND 3. VCC 4. FB 5. Sync
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
BLOCK DIAGRAM
#3 V
CC
32V
#5 Sync
5V
#4 FB
2µA
7.5V
25V
−
+
6.4V
2.5R
1mA
+
−
+
−
1R
9V
Thermal S/D
OVER VOLTAGE S/D
Vref
OSC
−
+
5V
ORDERING INFORMATION
Device Package Rating Topr (°°C)
KA2S0880 TO-3P-5L 800V, 8A −25°C to +85°C
Internal
bias
Good
logic
S
Q
R
L.E.B
0.1V
S
Q
R
Power on reset
#1 DRAIN
SFET
#2 GND
1999 Fairchild Semiconductor Corporation
Rev. B
1
KA2S0880 SPS
ABSOLUTE MAXIMUM RATINGS
Characteristic Symbol Value Unit
Drain-source (GND) voltage
Drain-Gate voltage (RGS=1MΩ) V
Gate-source (GND) voltage V
Drain current pulsed
(2)
Single pulsed avalanche energy
Avalanche current
(4)
Continuous drain current (TC=25°C) I
Continuous drain current (TC=100°C) I
Supply voltage V
Analog input voltage range V
Total power dissipation PD (watt H/S) 190 W
(1)
(3)
V
I
E
I
DSS
DGR
GS
DM
AS
AS
D
D
CC
FB
800 V
800 V
±30 V
32.0 A
810 mJ
25 A
8.0 A
5.6 A
30 V
−0.3 to V
SD
DC
DC
DC
V
Derating 1.54 W/°C
Operating temperature T
Storage temperature T
NOTES:
1. Tj=25°C to 150°C
2. Repetitive rating: Pulse width limited by maximum junction temperature
3. L=24mH, VDD=50V, RG=25Ω, starting Tj=25°C
4. L=13uH, VDD=330V, Tj=25°C
OPR
STG
−25 to +85 °C
−55 to +150 °C
2
SPS KA2S0880
ELECTRICAL CHARACTERISTICS (SFET part)
(Ta=25°C unless otherwise specified)
Characteristic Symbol Test condition Min. Typ. Max. Unit
Drain-source breakdown voltage BV
Zero gate voltage drain current I
DSS
DSS
VGS=0V, ID=50µA 800 − − V
VDS=Max., Rating, VGS=0V − − 50 µA
VDS=0.8Max., Rating,
− − 200 µA
VGS=0V, TC=125°C
(note)
(note)
R
DS(ON)
VGS=10V, ID=5.0A − 1.2 1.5 Ω
gfs VDS=15V, ID=5.0A 1.5 2.5 − mho
− 2460 − pF
f=1MHz
Static drain-source on resistance
Forward transconductance
Input capacitance Ciss VGS=0V, VDS=25V,
Output capacitance Coss − 210 −
Reverse transfer capacitance Crss − 64 −
Turn on delay time td(on) VDD=0.5BV
Rise time tr − 95 200
Turn off delay time td(off) − 150 450
Fall time tf − 60 150
Total gate charge
Qg VGS=10V, ID=8.0A,
(gate-source+gate-drain)
Gate-source charge Qgs − 20 −
Gate-drain (Miller) charge Qgd − 70 −
(MOSFET switching
time are essentially
independent of
operating temperature)
VDS=0.5BV
switching time are
essentially independent of
operating temperature)
, ID=8.0A
DSS
(MOSFET
DSS
− − 90 nS
− − 150 nC
NOTE: Pulse test: Pulse width ≤ 300µS, duty cycle ≤ 2%
3
KA2S0880 SPS
ELECTRICAL CHARACTERISTICS (Control part)
(Ta=25°C unless otherwise specified)
Characteristic Symbol Test condition Min. Typ. Max. Unit
REFERENCE SECTION
Output voltage
Temperature Stability
OSCILLATOR SECTION
(1)
(1)(2)
Vref Ta=25°C 4.80 5.00 5.20 V
Vref/∆T −25°C≤Ta≤+85°C − 0.3 0.6 mV/°C
Initial accuracy F
Frequency change with temperature
Sync threshold voltage
(3)
(2)
OSC
∆F/∆T −25°C≤Ta≤+85°C − ±5 ±10 %
V
SYTH
Ta=25°C 18 20 22 kHz
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
Shutdown delay current Idelay Ta=25°C, 5V≤Vfb≤V
Ta=25°C, Vfb=GND 0.7 0.9 1.1 mA
SD
1.4 1.8 2.2 µA
OVER CURRENT PROTECTION SECTION
Over current protection IL(max) Max. inductor current 4.40 5.00 5.60 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
Operating supply current
ST
I
OPR
VCC=14V 0.1 0.3 0.55 mA
Ta=25°C 6 12 18 mA
(control part only)
VCC zener voltage V
Z
ICC=20mA 30 32.5 35 V
SHUTDOWN SECTION
Shutdown Feedback voltage V
Thermal shutdown temperature (Tj)
(1)
Over voltage protection voltage V
T
SD
SD
OVP
− 6.9 7.5 8.1 V
− 140 160 − °C
− 23 25 28 V
SOFT START SECTION
Soft start current I
Soft start voltage 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.
SS
SS
Sync & S/S=GND 0.8 1.0 1.2 mA
VFB=2V 4.7 5.0 5.3 V
4
SPS KA2S0880
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
KA2S0880 SPS
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. VCC Zener Voltage Figure 10. Shutdown Feedback Voltage
Figure 11. Shutdown Delay Current Figure 12. Over Voltage Protection
6
SPS KA2S0880
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
7
TRADEMARKS
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.
ACEx™
CoolFET™
CROSSVOLT™
E2CMOS
TM
FACT™
FACT Quiet Series™
®
FAST
FASTr™
GTO™
HiSeC™
ISOPLANAR™
MICROWIRE™
POP™
PowerTrench™
QS™
Quiet Series™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
TinyLogic™
UHC™
VCX™
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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 APPROV AL OF FAIRCHILD SEMICONDUCTOR CORPORA TION.
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, 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 STA TUS DEFINITIONS
Definition of Terms
Datasheet Identification Product Status Definition
Advance Information
Preliminary
No Identification Needed
Obsolete
Formative or
In Design
First Production
Full Production
Not In Production
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.
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