30

s Block Diagram

SI-8201L•8202L•8203L•8204L•8221L

SI-8211L•8213L

SI-8301L•8303L

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.

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.

Vo

: Output Voltage

Io

: Output Current

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.

Switching Type

Self Oscillation Type with Coil

Vref

L1

Tr1

GND

Amp

Drive

Vref

L1

Tr1

Tr2

GND

Amp

Drive

1.5

1.0

0.5

0

0

2040

6080

100

SI-8201L

8202L

8203L

8204L

SI-8221L

SI-8211L

8213L

Ambient temperature Ta (

°C)

3.0

2.0

1.0

0

0

2040

6080

100

Ambient temperature Ta (

°C)

SI-8301L

8303L

s Ta-PD Characteristics

100

–1