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KA1M0765R/KA1M0765RC
Fairchild Power Switch(FPS)
www.fairchildsemi.com
Features
• Precision fixed operating frequency (67kHz)
• Pulse by pulse current limiting
• Over load protection
• Over voltage protecton (Min. 23V)
• Internal thermal shutdown function
• Under voltage lockout
• Internal high voltage sense FET
•Auto restart
•Soft start
Description
The Fairchild Power Switch(FPS) product family is specially
designed for an off line SMPS with minimal extern al
components. The Fairchild Power Switch(FPS) consist of
high voltage power SenseFET and current mode PWM
controller IC. PWM controller features integrated fixed
frequency oscillator, under voltage lock out, leading edge
blanking, optimized gate turn-on/turn-off driver, thermal
shutdown protection, over voltage protection, temperature
compensated precision current sources for loop
compensation and fault protection circuit. compared to
discrete MOSFE T and PWM controller or R
Fairchild Power Switch(FPS) 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.
TO-3P-5L
1
1. DRAIN 2. GND 3. Vcc 4. FB 5. S/S
TO-220-5L
1
solution, a
CC
Internal Block Diagram
#3 V
CC
32V
#5 Soft Start
5V
#4 FB
©2001 Fairchild Semiconductor Corporation
µ
5
7.5V
25V
A
2.5R
1mA
1R
9V
+
−
+
−
Thermal S/D
OVER VOLTAGE S/D
−
+
5V
Vref
OSC
L.E.B
0.1V
Good
logic
S
R
Internal
bias
Q
S
R
Power on res et
SFET
Q
#1 DRAIN
#2 GND
Rev.1.0.2
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KA1M0765R/KA1M0765RC
Absolute Maximum Ratings
Characteristic Symbol Value Unit
GS
(2)
(1)
=1MΩ)
C
(3)
=25°C)
Maximum Drain voltage
Drain-Gate voltage (R
Gate-source (GND) voltage
Drain current pulsed
Single pulsed avalanche energy
Continuous drain current (T
Continuous drain current (TC=100°C)
Maximum Supply voltage
Input voltage range
Total power dissipation
Operating ambient temperature
Storage temperature
V
D,MAX
V
DGR
V
GS
I
DM
E
AS
I
D
I
D
V
CC,MAX
V
FB
P
D
Derating
T
A
T
STG
650 V
650 V
±30 V
28.0 A
DC
570 mJ
7.0 A
5.6 A
DC
DC
30 V
−0.3 to V
SD
V
140 W
1.11 W/°C
−25 to +85 °C
−55 to +150 °C
Notes:
1. Tj=25°C to 150°C
2. Repetiti ve rating: Pulse width limi ted by maximum junction temp erature
3. L=24mH, V
=50V, RG=25Ω, starting Tj=25°C
DD
2
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KA1M0765R/KA1M0765RC
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
Static drain-source on resistance
Forward transconductance
(note)
(note)
DSS
DSS
R
DS(ON)
gfs VDS=15V, ID=4.0A 3.0 - - S
Input capacitance Ciss
Reverse transfer capacitance Crss - 120 Turn on delay time t
d(on)
Rise time tr - 55 Turn off delay time t
d(off)
Fall time tf - 50 Total gate charge
(gate-source+gate-drain)
Qg
Gate source charge Qgs - 9.3 Gate drain (Miller) charge Qgd - 29.3 -
VGS=0V, ID=50µA 650 - - V
VDS=Max., Rating,
V
=0V
GS
=0.8Max., Rating,
V
DS
V
=0V, TC=125°C
GS
--50µA
- - 200 mA
VGS=10V, ID=4.0A - 1.25 1.6 W
V
=0V, VDS=25V,
GS
- 1600 -
f=1MHz
VDD=0.5BV
DSS
, ID=7.0A
-25(MOSFET switching
time are essentially
independent of
-80operating temperature)
=10V, ID=7.0A,
V
V
GS
DS
=0.5BV
(MOSFET
DSS
--72
switching time are
essentially independent of
operating temperature)
pFOutput capacitance Coss - 310 -
nS
nC
Note:
Pulse test: Pulse width <
1
S
--- -=
R
300µS, duty < 2%
3
Page 4
KA1M0765R/KA1M0765RC
Electrical Charcteristics (CONTROL part)
(Ta = 25°C unless otherwise specified)
Characteristic Symbol Test condition Min. Typ. Max. Unit
UVLO SECTION
Start threshold voltage V
Stop threshold voltage V
START
STOP
After turn on 9 10 11 V
OSCILLATOR SECTION
Initial accuracy F
Frequency change with temperature
(2)
OSC
∆F/∆T −25°C ≤ Ta ≤ +85°C-±5 ±10 %
Ta=25°C616773kHz
Maximum duty cycle Dmax - 74 77 80 %
FEEDBACK SECTION
Feedback source current I
Shutdown Feedback voltage V
FB
SD
Ta=25°C, 0V ≤Vfb ≤ 3V 0.7 0.9 1.1 mA
Shutdown delay current Idelay Ta=25°C, 5V ≤ Vfb ≤ V
SOFT START SECTION
Soft Start Voltage V
Soft Start Current I
SS
SS
V
FB
Sync & S/S=GND 0.8 1.0 1.2 mA
REFERENCE SECTION
Output voltage
Temperature Stability
(1)
(1)(2)
Vref Ta = 25°C 4.80 5.00 5.20 V
Vref/∆T −25°C ≤ Ta ≤ +85°C-0.30.6mV/°C
CURRENT LIMIT (SELF-PROTECTION) SECTION
Peak Current Limit I
OVER
Max. inductor current 4.40 5.00 5.60 A
PROTECTION SECTION
Thermal shutdown temperature (Tj)
Over voltage protection voltage V
(1)
T
SD
OVP
TOTAL DEVICE SECTION
Start Up current I
Operating supply current
(control part only)
V
zener voltage V
CC
START
I
OP
Z
VCC=14V 0.1 0.3 0.4 mA
Ta=25°C 6 12 18 mA
ICC=20mA 30 32.5 35 V
-141516V
-6.97.58.1V
4.0 5.0 6.0 µA
SD
=2V 4.7 5.0 5.3 V
- 140 160 - °C
-232528V
Note:
1. These parameters, although guaranteed, are not 100% tested in production
2. These parameters, although guaranteed, are tested in EDS(water test) process
3.The amplitude of the sync. pulse is recommended to be between 2V and 3V for stable sync. function.
4
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Typical Performance Characteristics
(These characteristic graphs are normalized at Ta = 25°C)
KA1M0765R/KA1M0765RC
Fig.1 O per at ing Fr eque nc y
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
Temperature [°C] Temperature [°C]
Figure 1. Operating Frequency Figure 2. Feedback Source Current
Fig.3 Operating Cur rent
1
-25 0 25 50 75 100 125 150
Temperature [
Iop
l
OP
1.2
1.15
1.1
1.05
0.95
0.9
0.85
0.8
Fig.2 Feedback Sourc e Current
1.2
1.15
1.1
1.05
Ifb
1
IFB
0.95
0.9
0.85
0.8
-25 0 25 50 75 100 125 150
1.1
1.05
I
over
Ipeak
0.95
0.9
0.85
0.8
] Temperature [
C
°
Fig.4 Max Inductor Current
1
-25 0 25 50 75 100 125 150
]
C
°
Figure 3. Operating Supply Current Figure 4. Peak Current Limit
I
ST
Istart
1.5
1.3
1.1
0.9
0.7
0.5
Fig.5 Start up Current
-25 0 25 50 75 100 125 150
V
th(H)
Vstart
Fig.6 Star t Threshold Voltage
1.15
1.1
1.05
1
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Temperature [°
Figure 5. Start up Current Figure 6. Start Threshold Voltage
]Temperature [°C]
C
5
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KA1M0765R/KA1M0765RC
Typical Performance Characteristics
(Continued)
(These characteristic graphs are normalized at Ta = 25°C)
Fig.7 Stop Threshold Voltage
1.15
1.1
1.05
V
th(L)
1
Vstop
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Temperature [°C] Temperature [°C]
Figure 7. Stop Threshold Voltage Figure 8. Maximum Duty Cycle
1.2
1.15
1.1
1.05
Vz
0.95
0.9
0.85
0.8
Fig.9 V c c Zener Voltage
1
-25 0 25 50 75 100 125 150
Temperature [°
] Temperature [°C]
C
F i g .8 Maxi mum D u ty Cycl e
1.15
1.1
1.05
1
Dmax
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Fig.10 Shut do wn Feedback Voltage
1.15
1.1
1.05
Vsd
1
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Idelay
Figure 9. V
Fig.11 Shut do wn Delay Current
1.2
1.15
1.1
1.05
1
0.95
0.9
0.85
0.8
-25 0 25 50 75 100 125 150
Zener Voltage Figure 10. Shutdown Feedback Voltage
CC
Fig.12 Over Voltage Prot ec tion
1.15
1.1
1.05
Vovp
1
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Temperature [°
]Temperature [°C]
C
Figure 11. Shutdown Delay Current Figure 12. Over Voltage Protection
6
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KA1M0765R/KA1M0765RC
Typical Performance Characteristics
(Continued)
(These characteristic graphs are normalized at Ta = 25°C)
1.15
Fig.13 Soft Start Voltage
1.1
1.05
Vss
1
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Figure13. Soft Start Voltage
Fig.14 Drain Sour c e Turn-on
Resistance
2.5
2
1.5
)
(
Rdson
1
0.5
0
-25 0 25 50 75 100 125 150
Figure 14. Static Drain-Source on Resistance
7
Page 8
KA1M0765R/KA1M0765RC
Package Dimensions
TO-3P-5L
8
Page 9
KA1M0765R/KA1M0765RC
Package Dimensions
TO-3P-5L (Forming)
(Continued)
9
Page 10
KA1M0765R/KA1M0765RC
Package Dimensions
(Continued)
TO-220-5L
10
Page 11
KA1M0765R/KA1M0765RC
Package Dimensions
(Continued)
TO-220-5L(Forming)
11
Page 12
KA1M0765R/KA1M0765RC
Ordering Information
Product Number Package Rating Fosc
KA1M0765R-TU TO-3P-5L
KA1M0765R-YDTU TO-3P-5L(Forming)
650V, 7A 67kHz
KA1M0765RC-TU TO-220-5L
KA1M0765RC-YDTU TO-220-5L(Forming)
TU : Non Forming Type
YDTU : Forming Type
650V, 7A 67kHz
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURT HER NOTICE TO ANY
PRODUCTS HEREI N TO IMPROVE RELIABILITY, FUNCTIO N OR DESIGN. FAIRCH IL D 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 IT S PATENT RIGHTS, NOR THE RIGHTS OF OTHE RS.
LIFE SUPPORT POL I CY
FAIRCHILD’S PR ODUCTS ARE NOT AUTH ORIZED FOR USE AS C RITICAL COMPONENT S IN LIFE SUPPORT DE VICES
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.
www.fairchildsemi.com
2. A critical component in any component of a life support
device or sy stem whose fai lure to perform can be
reasonably expec ted to cause the failur e of the life support
device or system, or to affect its safety or effec t iv ene ss .
10/17/01 0.0m 001
2001 Fairchild Semiconductor Corporation
Stock#DSxxxxxxxx
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