SI-8200L/8300L
Series
Switching Type
Features
q
q
q
q
Integrated switching IC and coil construction
Requires 2 external components only
Low switching noise
Heatsink not required
Self Oscillation Type with Coil
Applications
q
For power supplies in telephone sets
q
For power supplies in office equipment
External View
s
Lineup
8200L Series
Type No.
SI-8201L
SI-8202L
SI-8203L
SI-8204L
SI-8221L
V
O
5V
6V
I
O
0.4A
0.35A
8200L Series (high-VIN type)
Type No.
SI-8211L
SI-8213L
V
O
5V
I
O
0.3A
8300L Series
Type No.
SI-8301L
SI-8303L
V
O
5V
5.4V
I
O
1A
1A
12V 0.28A
12V 0.35A
5.2V
5V
0.4A
0.4A
s
Absolute Maximum Ratings
Ratings
Parameter
Symbol
8200L Series
8300L Series
Unit
SI-8201L SL-8202L SI-8203L SI-8204L SI-8221L SI-8211L SI-8213L SI-8301L SI-8303L
DC Input Voltage
Storage Temperature
V
IN
T
stg
45
40
–25 to +85
60
45
V
°C
s
Recommended Operating Conditions
Ratings
Parameter
Symbol
8200L Series
8300L Series
Unit
SI-8201L SL-8202L SI-8203L SI-8204L SI-8221L SI-8211L SI-8213L SI-8301L SI-8303L
DC Input Voltage Range
Output Current Range
Operating Temperature Range
V
IN
I
O
T
op
10 to 40 11 to 40 16 to 40 10 to 40 8 to 35 15 to 55 22 to 55 8 to 40 8.5 to 40
0 to 0.4
0 to 0.35
0 to 0.4
–10 to +65
0 to 0.3 0 to 0.28
0 to 1
–20 to +85
V
A
°C
27
SI-8200L/8300L
Series
Switching Type
Self Oscillation Type with Coil
s
Block Diagram
SI-8201L•8202L•8203L•8204L•8221L
SI-8301L•8303L
L1
V
IN
L
IN
V
OUT
V
IN
Tr1
SI-8211L•8213L
L
IN
L1
V
OUT
Tr1
D
I
Vref
Amp
Drive
Tr2
D
I
Drive
Amp
Vref
GND
GND
s
Ta-PD Characteristics
SI-8201L
8202L
8203L
8204L
SI-8221L
SI-8211L
8213L
1.0
P
D
= V
O
• I
O
3.0
SI-8301L
8303L
1.5
100
η
χ
–1
Power Dissipation P
D
(W)
Power Dissipation P
D
(W)
2.0
Vo
Io
η
χ
: Output Voltage
: Output Current
: Efficiency
0.5
1.0
0
0
20
40
60
80
100
0
Note : The efficiency depends on the
input voltage and the output
current. Thus, obtain the value
from the efficiency graph and
substitute the percentage in
the formula above.
0
20
40
60
80
100
Ambient temperature Ta (°C)
Ambient temperature Ta (°C)
s
Caution
1. A low-impedance capacitor suitable for switching applications must be used for the external capacitor and must be
connected as close to the IC as possible in order to assure low ripple voltage and stable switching operation.
2. The SI-8200L and 8300L series do not have a built-in overcurrent protection circuit. Thus, avoid short-circuit
conditions that may cause a flow of overcurrent.
3. The SI-8300L series may not start up if the input voltage rises too rapidly.
Do not use the SI-8300L series in applications where the input terminal, pin6, is opened and closed directly in a state
where the input voltage is already applied.
4. Terminals L
IN
and NC in the connection diagram must be left unconnected to other circuits.
5. The IC’s metallic heatsink is electrically floating. Do not connect it to GND or any other circuit.
6. Since the SI-8200L and 8300L series have an open-package construction, they can only be operated in specific
environments. Verify the operating environment and use the IC within the conditions indicated in the reliability data.
30
SI-8200L/8300L Series Typical Operating Characteristics (Ta=25°C)
s
SI-8201L
Rise Characteristics
6
5
Output Voltage Vo (V)
Efficiency Characteristics
80
70
V
IN
10V
15V
20V
25V
30V
35V
40V
lo=0A
4
Io=0.4A (C.C)
3
R
L
=12.5Ω
2
1
0
Efficiency
η
(%)
60
50
40
30
20
10
0
0
5
10
Input Voltage V
IN
(V)
15
20
0
0.05 0.10 0.15 0.20 0.25 0.30 0.35
Output Current lo (A)
0.40 0.45
s
SI-8203L
Rise Characteristics
14
12
Output Voltage Vo (V)
Efficiency Characteristics
90
80
70
Efficiency
η
(%)
V
IN
16V
20V
25V
30V
35V
40V
10
8
6
R
L
=34.3Ω
4
2
0
0
5
10
Input Voltage V
IN
(V)
15
20
lo=0A
Io=0.35A (C.C)
60
50
40
30
20
0
0
0.1
0.2
Output Current lo (A)
0.3
0.4
s
SI-8221L
Rise Characteristics
6
5
Output Voltage Vo (V)
4
3
2
1
0
90
V
IN
Efficiency Characteristics
V
IN
=
8V
10V
15V
20V
25V
30V
35V
80
lo=0A
Io=0.4A (C.C)
70
Efficiency
η
(%)
15
20
60
50
40
30
20
R
L
=12.5Ω
0
5
10
Input Voltage V
IN
(V)
0
0
0.05
0.1
0.15 0.2 0.25 0.3
Output Current lo (A)
0.35
0.4
0.45
31
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