www.fairchildsemi.com
KA5x02xx-SERIES
KA5H0265RC, KA5M0265R, KA5L0265R,
KA5H02659RN/KA5M02659RN, KA5H0280R,
KA5M0280R
Fairchild Power Switch(FPS)
Features
•
•
•
•
•
•
•
•
•
Precision Fixed Operating Frequency (100/67/50kHz)
Low Start-up Current (Typ. 100uA)
Pulse by Pulse Current Limiting
Over Load Protection
Over Voltage Protection (Min. 25V)
Internal Thermal Shutdown Function
Under Voltage Lockout
Internal High Voltage Sense FET
Auto-Restart Mode
Description
The Fairchild Power Switch(FPS) product family is specially
designed for an off-line SMPS with minimal external
components. The Fairchild Power Switch(FPS) 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 R
CC
switching converter solution. The 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-220F-4L
8-DIP
TO220-5L
1
1
1. GND
2. Drain
3. Vcc
4. FB
1.6.7.8. Drain
2. GND
3. Vcc
4. FB
5. NC
1
1. Drain
2. GND
3. Vcc
4. FB
5. S/S
Internal Block Diagram
V
CC
32V
5V
Vref
Good
logic
Internal
bias
DRAIN
SFET
*
Soft Start
5V
uA
OSC
S
R
Q
−
5µA
1mA 2.5R
1R
9V
+
7.5V
−
+
27V
−
Thermal S/D
OVER VOLTAGE S/D
+
0.1V
S
R
Q
GND
FB
L.E.B
Power on reset
* KA5H0265RC
Rev.1.0.4
©2003 Fairchild Semiconductor Corporation
KA5X02XX-SERIES
Absolute Maximum Ratings
(Ta=25°C, unless otherwise specified)
Characteristic
KA5x0265xRx
Drain-Gate Voltage (R
GS
=1MΩ)
Gate-Source (GND) Voltage
Drain Current Pulsed
(1)
Continuous Drain Current (T
C
=25°C)
Continuous Drain Current (T
C
=100°C)
Single Pulsed Avalanche Energy
(2)
Maximum Supply Voltage
Analog Input Voltage Range
Total Power Dissipation
Operating Junction Temperature.
Operating Ambient Temperature.
Storage Temperature Range.
KA5x0280R
Drain-Gate Voltage (R
GS
=1MΩ)
Gate-Source (GND) Voltage
Drain Current Pulsed
(1)
Continuous Drain Current (T
C
=25°C)
Continuous Drain Current (T
C
=100°C)
Single Pulsed Avalanche Energy
(2)
Maximum Supply Voltage
Analog Input Voltage Range
Total Power Dissipation
Operating Junction Temperature.
Operating Ambient Temperature.
Storage Temperature Range.
V
DGR
V
GS
I
DM
I
D
I
D
E
AS
V
CC,MAX
V
FB
P
D
Darting
T
J
T
A
T
STG
800
±30
8.0
2.0
1.3
90
30
-0.3 to V
SD
35
0.28
+160
-25 to +85
-55 to +150
V
V
A
DC
A
DC
A
DC
mJ
V
V
W
W/°C
°C
°C
°C
V
DGR
V
GS
I
DM
I
D
I
D
E
AS
V
CC,MAX
V
FB
P
D
Darting
T
J
T
A
T
STG
650
±30
8.0
2.0
1.3
68
30
-0.3 to V
SD
42
0.33
+160
-25 to +85
-55 to +150
V
V
A
DC
A
DC
A
DC
mJ
V
V
W
W/°C
°C
°C
°C
Symbol
Value
Unit
Note:
1. Repetitive rating: Pulse width limited by maximum junction temperature
2. L = 51mH, starting T
j
= 25°C
2
KA5X02XX-SERIES
Electrical Characteristics (SFET Part)
(Ta=25°C unless otherwise specified)
Parameter
KA5x0265xRx
Drain-Source Breakdown Voltage
Zero Gate Voltage Drain Current
Static Drain-Source on Resistance
(Note)
Forward Transconductance
(Note)
Input Capacitance
Output Capacitance
Reverse Transfer Capacitance
Turn on Delay Time
Rise Time
Turn Off Delay Time
Fall Time
Total Gate Charge
(Gate-Source+Gate-Drain)
Gate-Source Charge
Gate-Drain (Miller) Charge
KA5x0280R
Drain-Source Breakdown Voltage
Zero Gate Voltage Drain Current
Static Drain-Source on Resistance
(Note)
Forward Transconductance
(Note)
Input Capacitance
Output Capacitance
Reverse Transfer Capacitance
Turn on Delay Time
Rise Time
Turn Off Delay Time
Fall Time
Total Gate Charge
(Gate-Source+Gate-Drain)
Gate-Source Charge
Gate-Drain (Miller) Charge
Note:
1.
Pulse test: Pulse width
≤
300µS, duty cycle
≤
2%
1
2.
S
= ---
-
R
Symbol
BV
DSS
I
DSS
R
DS(ON)
gfs
Ciss
Coss
Crss
td(on)
tr
td(off)
tf
Qg
Qgs
Qgd
Condition
V
GS
=0V, I
D
=50µA
V
DS
=Max. Rating, V
GS
=0V
V
DS
=0.8Max. Rating,
V
GS
=0V, T
C
=125°C
V
GS
=10V, I
D
=0.5A
V
DS
=50V, I
D
=0.5A
V
GS
=0V, V
DS
=25V,
f=1MHz
V
DD
=0.5B V
DSS
, I
D
=1.0A
(MOSFET switching time is
essentially independent of
operating temperature)
V
GS
=10V, I
D
=1.0A,
V
DS
=0.5B V
DSS
(MOSFET
switching time is essentially
independent of operating
temperature)
V
GS
=0V, I
D
=50µA
V
DS
=Max. Rating, V
GS
=0V
V
DS
=0.8Max. Rating,
V
GS
=0V, T
C
=125°C
V
GS
=10V, I
D
=0.5A
V
DS
=50V, I
D
=0.5A
V
GS
=0V, V
DS
=25V,
f=1MHz
V
DD
=0.5B V
DSS
, I
D
=1.0A
(MOSFET switching time is
essentially independent of
operating temperature)
V
GS
=10V, I
D
=1.0A,
V
DS
=0.5B V
DSS
(MOSFET
switching time is essentially
independent of operating
temperature)
Min.
650
-
-
-
1.5
-
-
-
-
-
-
-
-
-
-
Typ.
-
-
-
5.0
2.5
550
38
17
20
15
55
25
-
3
12
Max.
-
50
200
6.0
-
-
-
-
-
-
-
-
35
-
-
Unit
V
µA
µA
Ω
S
pF
nS
nC
BV
DSS
I
DSS
R
DS(ON)
gfs
Ciss
Coss
Crss
td(on)
tr
td(off)
tf
Qg
Qgs
Qgd
800
-
-
-
1.5
-
-
-
-
-
-
-
-
-
-
-
-
-
5.6
2.5
250
52
25
21
28
77
24
-
15
20
-
50
200
7.0
-
-
-
-
-
-
-
-
60
-
-
V
µA
µA
Ω
S
pF
nS
nC
3
KA5X02XX-SERIES
Electrical Characteristics (Control Part)
(Continued)
(Ta=25°C unless otherwise specified)
Parameter
UVLO SECTION
Start Threshold Voltage
Stop Threshold Voltage
OSCILLATOR SECTION
Initial Accuracy
Initial Accuracy
Initial Accuracy
Frequency Change With Temperature
(2)
Maximum Duty Cycle
Maximum Duty Cycle
FEEDBACK SECTION
Feedback Source Current
Shutdown Feedback Voltage
Shutdown Delay Current
SOFT START SECTION
Soft Start Voltage
Soft Start Current
REFERENCE SECTION
Output Voltage
(1)
Temperature Stability
(1)(2)
Peak Current Limit
Peak Current Limit
PROTECTION SECTION
Over Voltage Protection
Thermal Shutdown Temperature
(1)
TOTAL DEVICE SECTION
Start-up Current
Operating Supply Current
(Control Part Only)
I
START
I
OPR
V
CC
=14V
V
CC
≤
28
-
-
100
7
170
12
µA
mA
V
OVP
T
SD
V
CC
≥
24V
-
25
140
27
160
29
-
V
°C
Vref
Vref/∆T
I
OVER
I
OVER
Ta=25°C
-25°C
≤
Ta
≤
+85°C
KA5x02659RN
KA5x0265Rx
KA5x0280R
4.80
-
0.79
1.05
5.00
0.3
0.9
1.2
5.20
0.6
1.01
1.34
V
mV/°C
A
A
V
SS
I
SS
KA5H0265RC
4.7
0.8
5.0
1.0
5.3
1.2
V
mA
I
FB
V
SD
Idelay
Ta=25°C, 0V
≤
Vfb
≤
3V
Vfb
≤
6.5V
Ta=25°C, 5V
≤
Vfb
≤
V
SD
0.7
6.9
4
0.9
7.5
5
1.1
8.1
6
mA
V
µA
F
OSC
F
OSC
F
OSC
∆F/∆T
Dmax
Dmax
KA5H0265xRx
KA5H0280R
KA5M0265xRx
KA5M0280R
KA5L0265R
-25°C
≤
Ta
≤
+85°C
KA5H0265xRx
KA5H0280R
KA5M0265xRx
KA5M0280R
KA5L0265R
90
61
45
-
62
72
100
67
50
±5
67
77
110
73
55
±10
72
82
kHz
kHz
kHz
%
%
%
V
START
V
STOP
V
FB
=GND
V
FB
=GND
14
8.2
15
8.8
16
9.4
V
V
Symbol
Condition
Min.
Typ.
Max.
Unit
CURRENT LIMIT(SELF-PROTECTION)SECTION
Note:
1. These parameters, although guaranteed, are not 100% tested in production
2. These parameters, although guaranteed, are tested in EDS (wafer test) process
4
KA5X02XX-SERIES
Typical Performance Characteristics
(These characteristic graphs are normalized at Ta=25°C)
Fig.1 Operating Frequency
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
Fig.2 Feedback Source Current
1.2
1.15
1.1
1.05
Ifb
1
0.95
0.9
0.85
0.8
-25
0
25
50
75
100
125 150
Temperature [°C]
Figure 1. Operating Frequency
Temperature [°C]
Figure 2. Feedback Source Current
Fig.3 Operating Current
1.2
1.15
1.1
1.05
Iop
1
0.95
0.9
0.85
0.8
-25
1.1
1.05
Fig.4 Max Inductor Current
I
Ipeak
1
over
0.95
0.9
0.85
0
25
50
75
100 125 150
0.8
-25
0
25
50
75
100 125 150
Temperature [°C]
Figure 3. Operating Supply Current
Temperature [°C]
Figure 4. Peak Current Limit
1.5
1.3
Fig.5 Start up Current
1.15
1.1
1.05
Fig.6 Start Threshold Voltage
Istart
1.1
0.9
0.7
0.5
-25
Vstart
1
0.95
0.9
0
25
50
75
100 125 150
0.85
-25
0
25
50
75
100 125 150
Temperature [°C]
Figure 5. Start up Current
Temperature [°C]
Figure 6. Start Threshold Voltage
5
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