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KA7511
SMPS Controller
Features
•
•
•
•
Wide Operating Range
Under Voltage Lockout
Direct Switching TR Drive
Low Start-Up Current
Description
The KA7511 drives, regulates and monitors the main switch-
ing element in a SMPS based on the nonsynchronous flyback
theory. Because of the wide regulating range and the high
voltage stability during large load changes, the power sup-
plies for TV receivers and video recorders can be realized.
10-SIP H/S
1
Internal Block Diagram
Rev. 5.0
©2000 Fairchild Semiconductor International
KA7511
Absolute Maximum Ratings (T
A
=25°C)
°
Parameter
Supply Voltage
Reference Output Voltage
Zero Passage Identification Voltage
Control Amplifier Voltage
Collector Current Simulation Voltage
Blocking Input Voltage
Base Current Cut-Off Point Voltage
Base Current Amplifier Output Voltage
Collector Current Simulation Current
Blocking Input Current
Base Current Cut-Off Point Current
Base Current Amplifier Output Current
Operating Temperature Range
Symbol
V
CC
V
REF
V
2
V
3
V
4
V
5
V
7
V
8
I
4
I
5
I
7
I
8
T
A
Value
20
6
±
0.6
3
8
8
V
9
V
9
5
5
1.5
-1.5
0 ~ +70
Unit
V
V
V
V
V
V
V
V
mA
mA
A
A
°C
Electrical Characteristics
(T
A
= 25°C, unless otherwise specified)
Parameter
Supply Voltage
Start Operation
Supply Current
(1)
(2)
(3)
Switch On V
1
I
CC1
I
CC2
I
CC3
V
9
V
9
= 2V
V
9
= 5V
V
9
= 10V
-
-
-
-
11.0
-
1.5
2.4
11.8
0.5
2.0
3.2
12.3
mA
mA
mA
V
Symbol
V
CC
Conditions
-
Min.
-
Typ.
15
Max.
18
Unit
V
2
KA7511
Electrical Characteristics
(T
A
= +25°C, unless otherwise specified)
Parameter
Supply Current (4)
(5)
Reference Voltage(1)
(2)
Temperature Coefficient Of V
REF
Control Voltage
Collector Current Simulation Voltage
Clamping Voltage
Output Voltage
Symbol
I
CC4
I
CC5
V
REF1
V
REF2
∆V
REF
/∆T
V
3
V
4
∆V
4
V
5
V
7
V
8
∆V
8
Feedback Voltage
Supply Current (6)
Switch-Off Voltage (1)
(2)
Blocking Input Voltage
V
8
Off Voltage
V
1
Off Voltage
Note :
* After Switch-On
Conditions
V
(CTRL)
= -10V
V
(CTRL)
= 0V
I
1
≤
0.1mA
I
1
= 5mA
-
V
(CTRL)
= 0V
V
(CTRL)
= 0V
V
(CTRL)
= 0 ~ -10V
-
V
(CTRL)
= 0V
V
(CTRL)
= 0V
V
(CTRL)
= 0 ~ -10V
-
V
5
≤
1.9V
V
5
≤
1.9V
V
5
≤
1.9V
V
(CTRL)
= 0V
V
(CTRL)
= 0V
V
(CTRL)
= 0V
Min.
110
50
4.0
4.0
-
2.3
1.8
0.3
6
2.7
2.7
1.6
-
14
1.3
1.8
V
1
/2- 0.1
6.7
0.3
Typ.
135
75
4.2
4.2
0.1
2.6
2.2
0.4
7
3.3
3.4
2.0
0.2
22
1.5
2.1
V
1
/2
7.4
0.6
Max.
160
100
4.5
4.4
-
2.9
2.5
0.5
8
4.0
4.0
2.4
-
28
1.8
2.5
-
7.8
1
Unit
mA
mA
V
V
%
V
V
V
V
V
V
V
V
mA
V
V
V
V
V
Normal Operation (V
CC
= 10V, V
(CTRL)
= -10V, V
(CLK)
=
±
0.5V, f = 20KHz, D = 0.5)
V
2
I
CC6
V
7(OFF)
V
4(OFF)
V
5(B)
V
9(OFF)
∆V
9(OFF)
Protective Operation (V
CC
= 10V, V
(CTRL)
= -10V, V
(CLK)
=
±
0.5V, f = 20KHz, D = 0.5)
Figure 1. Test Circuit
3
KA7511
Figure 2. V
REF
V
S
I
REF
(T
A
=25°C)
°
Figure 3. I
CC
V
S
V
REF
(T
A
=25°C)
°
4
#1
Package
#10
25.75
±0.10
1.013
±0.004
26.05
MAX
1.026
1.30
±0.10
0.051
±0.004
0.50
±0.10
0.020
±0.004
(
1.50
)
0.059
Mechanical Dimensions
0.50
±0.10
0.020
±0.004
1.65
±0.10
0.065
±0.004
(
1.30
)
0.051
2.54
0.100
10-SIP H/S
7.00
±0.30
0.276
±0.012
8.90
±0.20
0.350
±0.008
1.00
±0.20
0.039
±0.008
13.65
±0.30
0.537
±0.012
Dimensions in millimeters
3.80
±0.20
0.150
±0.008
16.80
MAX
0.661
3.25
±0.20
0.128
±0.008
23.86
±0.20
0.939
±0.008
KA7511
5
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