AN8083 Просмотр технического описания (PDF) - Panasonic Corporation

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производитель

AN8083

Low Voltage Operation IC for DC-DC Converter

Panasonic Corporation 

ICs for CD/CD-ROM Player

AN8083S

• Miscellaneous

1. Method for making output voltage variable

VCC = 0.7V × (R1 + R2)/R2

R1 = RX // R3

R2 = RY // R4

ex) Where VCC = 5V,

RX = 51kΩ

RY = 7.5kΩ

VCC (16)

RX

R3 =20.5kΩ

IN (1)

RY

R4 =3.5kΩ

2. Method for making decreased voltage detection variable

VSEN =

R1 + R2

R2

× 1.25

ex) VSEN = 3V

VSEN =

R1 + R2 + R3

R2

× 1.25

R3 = 7kΩ

However, take care that an external resistance causes different temperature characteristics.

R3 VSEN (14)

R1 =7kΩ

R2 =10kΩ

3. Reset output

When the output voltage is made variable, detection voltage changes.

15

16

51kΩ

3.64kΩ

1.25V

1

7.5kΩ

3.5kΩ

VCC = 4.8V→ 4.2V (No changes)

VCC = 5V→ 4.27V

• Chopper type application

16

AN8083S

8

51kΩ

12

5

33kΩ

7.5kΩ

0.01µF

0.01µF

100Ω

0.01µF

100Ω

4.8V±0.3V

2SD1328

2SD1328

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