Fairchild Semiconductor KA1M0765R Datasheet
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
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
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
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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