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FS6S1265RE
Fairchild Power Switch(FPS)
Features
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Wide Operating Frequency Range Up to 150kHz
Lowest Cost SMPS Solution
Lowest External Components
Low Start up Current (Max:170uA)
Low Operating Current (Max:15mA)
Internal High Voltage SenseFET
Built-in Auto Restart Circuit
Over Voltage Protection (Auto Restart Mode)
Over Load Protection (Auto Restart Mode)
Over Current Protection (Auto Restart Mode)
Internal Thermal Protection (Auto Restart Mode)
Pulse By Pulse Over Current Limiting
Internal Burst Mode Controller for Stand-by Mode
Under Voltage Lockout With Hysteresis
External Sync. Terminal
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, 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, a Fairchild Power Switch(FPS) can reduce total
component count, design size, and 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
1. Drain 2. Gnd 3. V
CC
4. FeedBack 5. Sync.
Internal Block Diagram
Vcc
Vref
Drain
3
Vpp=5.8/7.2V
OSC
Internal
Bias
Vref
Vfb
Vth=1V
Burst mode
controller
Vref
1
SoftStart
& Sync
5
UVLO
S
Q
Ron
Vcc
Vth=11V/12V
R
Roff
PWM
Feedback
4
Ifb
2.5R
R
Vcc
Vfb Offset
Rsenese
Vref
Idelay
OLP
Vth=7.5V
Vcc
Vth=30V
OVP
OCL
Filter
(130nsec)
TS
D
Vth=1V
2
GND
S
UVLO Reset
(Vcc=9V)
Q
(Tj=160℃)
R
Rev.1.0.1
©2003 Fairchild Semiconductor Corporation
FS6S1265RE
Absolute Maximum Ratings
(Ta=25°C, unless otherwise specified)
Characteristic
Drain-Gate Voltage(R
GS
=1MΩ)
Gate-Source(GND) Voltage
Drain Current Pulsed
(1)
Continuous Drain Current (Tc = 25°C)
Continuous Drain Current (Tc = 100°C)
Single Pulsed Avalanche Current
(3)
(Energy
(2)
)
Maximum Supply Voltage
Input Voltage Range
Total Power Dissipation
Operating Junction Temperature.
Operating Ambient Temperature.
Storage Temperature Range.
Symbol
V
DGR
V
GS
I
DM
I
D
I
D
I
AS
(E
AS
)
V
CC,MAX
V
FB
V
SS
P
D
(Watt H/S)
Darting
T
J
T
A
T
STG
Value
650
±30
48
12
8.4
30(950)
35
-0.3 to V
CC
-0.3 to 10
240
1.92
+150
-25 to +85
-55 to +150
Unit
V
V
ADC
ADC
ADC
A(mJ)
V
V
V
W
W/°C
°C
°C
°C
Note:
1. Repetitive rating: pulse width limited by maximum junction temperature
2. L = 10mH, starting T
j
= 25
°C
3. L = 13uH, starting T
j
= 25
°C
2
FS6S1265RE
Electrical Characteristics (SFET Part)
(Ta = 25°C unless otherwise specified)
Parameter
Drain-Source Breakdown Voltage
Zero Gate Voltage Drain Current
Static Drain-Source on Resistance
(1)
Forward Transconductance
(2)
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
≤
300us, duty 2%
1
-
2. S
= ---
R
Symbol
BV
DSS
I
DSS
R
DS(on)
gfs
Ciss
Coss
Crss
t
d(on)
tr
t
d(off)
tf
Qg
Qgs
Qgd
Conditions
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
= 4.5A
V
DS
= 50V, I
D
= 4.5A
V
GS
= 0V, V
DS
= 25V,
f = 1MHz
V
DD
= 0.5BV
DSS
, I
D
= 12.0A
(MOSFET switching
time are essentially
independent of
operating temperature)
V
GS
= 10V, I
D
= 12.0A,
V
DS
= 0.5BV
DSS
(MOSFET
Switching time are
Essentially independent of
Operating temperature)
Min.
650
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ.
-
-
-
0.7
-
1820
185
32
38
120
200
100
60
10
30
Max.
-
200
300
0.9
-
-
-
-
-
-
-
-
-
-
-
Unit
V
µA
µA
Ω
S
pF
nS
nC
3
FS6S1265RE
Electrical Characteristics (Control Part)
(Continued)
(V
CC
=16V, Tamb = 25°C unless otherwise specified)
Parameter
UVLO SECTION
Start Threshold Voltage
Stop Threshold Voltage
OSCILLATOR SECTION
Initial Frequency
Voltage Stability
Temperature Stability (Note2)
Maximum Duty Cycle
Minimum Duty Cycle
FEEDBACK SECTION
Feedback Source Current
Shutdown Feedback Voltage
Shutdown Delay Current
SYNC. & SOFTSTART SECTION
Softstart Voltage
Softstart Current
Sync High Threshold Voltage(Note3)
Sync Low Threshold Voltage(Note3)
BURST MODE SECTION
Burst Mode Low Threshold Voltage
Burst Mode High Threshold Voltage
Burst Mode Enable Feedback Voltage
Burst Mode Peak Current Limit(Note4)
Burst Mode Freqency
Peak Current Limit (Note4)
PROTECTION SECTION
Over Voltage Protection
Over Current Latch voltage(Note3)
Thermal Shutdown Tempature(Note2)
TOTAL DEVICE SECTION
Start-Up Current
Operating Supply Current(Note1)
I
START
I
OP
I
OP(MIN)
I
OP(MAX)
V
FB
= GND, V
CC
= 14V
V
FB
= GND, V
CC
= 16V
V
FB
= GND, V
CC
= 12V
V
FB
= GND, V
CC
= 30V
-
10
15
mA
-
0.1
0.17
mA
V
OVP
V
OCL
T
SD
V
CC
≥
27V
-
-
27
0.9
140
30
1.0
160
33
1.1
-
V
V
°C
V
BURL
V
BURH
V
BEN
I
BURPK
F
BUR
I
OVER
V
FB
=0V
V
FB
=0V
V
CC
=10.5V
-
V
CC
=10.5V , V
FB
=0V
-
10.4
11.4
0.7
0.45
40
7.04
11.0
12.0
1.0
0.6
50
8.0
11.6
12.6
1.3
0.75
60
8.96
V
V
V
A
kHz
A
V
SS
I
SS
V
SYNCH
V
SYNCL
V
FB
=2V
V
SS
=0V
V
CC
=16V , V
FB
=5V
V
CC
=16V , V
FB
=5V
4.7
0.8
-
-
5.0
1.0
7.2
5.8
5.3
1.2
-
-
V
mA
V
V
I
FB
V
SD
I
DELAY
V
FB
=GND
V
FB
≥
6.9V
V
FB
=5V
0.7
6.9
1.6
0.9
7.5
2.0
1.1
8.1
2.4
mA
V
F
OSC
F
STABLE
∆F
OSC
D
MAX
D
MIN
-
12V
≤
V
CC
≤
23V
-25°C
≤ Τa ≤
85°C
-
-
22
0
0
92
-
25
1
±5
95
-
28
3
±10
98
0
kHz
%
%
%
%
V
START
V
STOP
V
FB
=GND
V
FB
=GND
14
8
15
9
16
10
V
V
Symbol
Conditions
Min.
Typ.
Max.
Unit
µ
A
CURRENT LIMIT(SELF-PROTECTION)SECTION
Notes:
1. These parameters are the Current Flowing in the Control IC.
2. These parameters, although guaranteed, are not 100% tested in production
3. These parameters, although guaranteed, are tested in EDS(wafer test) process
4. These parameters are indicated Inductor Current.
4
FS6S1265RE
Typical Performance Characteristics
0.150 [mA]
Start Up Current vs. Temp
11.0
[mA]
Operating Current vs. Temp
0.125
10.5
0.100
10.0
0.075
9.5
0.050
-25
0
25
50
75
100 125 150
Figure 1.
Start Up Current vs. Temp.
9.0
-25
0
25
50
75
100
125
150
Figure 2. Operating Current vs. Temp.
16.0 [V]
Start Threshold Voltage vs. Temp
10.0
[V]
Stop Threshold Voltage vs. Temp
15.5
9.5
15.0
9.0
14.5
8.5
14.0
-25
0
25
50
75
100
125
150
8.0
-25
0
25
50
75
100
125
150
Figure 3.
Start Threshold Voltage
vs. Temp.
[KHz]
28
27
Figure 4. Stop Threshold Voltage vs. Temp.
Initial Freqency vs. Temp
96.0
[%]
Maximum Duty vs. Temp
95.5
26
25
24
94.5
23
22
-25
0
25
50
75
100
125
150
94.0
-25
0
25
50
75
100
125
150
95.0
Figure 5. Initial Frequency
vs. Temp.
Figure 6. Maximum Duty
vs. Temp.
5
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