Elektronische Bauelemente

SPW8103S

Dual OP-AMP and 2.5V 0.7%

Voltage Reference

* Max. 27V Voltage Rating

* Low Input Offset Voltage

* Precision 0.7% Voltage Reference

* Adapter

* Switching Power Supply

* Portable Device

Features

Appliactions

The SPW8103S consists of 2 low-offset voltage amplifiers and

a high-accuracy 2.5V voltage reference in SOP-8 package.

The SPW8103S provides a low cost and space saving solution

for the application such as power supply and switching adapters.

The SPW8103S is available in a SOP-8 package. It can operate

over the ambient temperature range from -40 C to 105 C.

Description

o

o

01-Jun-2002 Rev. A

Page 1 of 4

http://www.SeCoSGmbH.com/

Any changing of specification will not be informed individual

RoHS Compliant Product

rogrammed by

pacitor CT to ground .Operation 500kHz

nts up to

This is the reference output .It provides charging current for capacitor CT

SOP-8

0.25

Dimensions in millimeters

6.20

5.80

0.35

0.49

4.80

5.00

0

0.10 0.25

1.35

1.75

0.40

0.90

0.19

0.25

3.80

4.00

0.375 REF

o

8

o

45

o

The oscillator frequency and maximum output duty cycle are programmed by

pacitor CT to ground .Operation 500kHz

This output directly drives the gate of a power MOSFET. Peak currents up to

This is the reference output .It provides charging current for capacitor CT

±

±

Typical Circuit

Block Diagram

S

PW8103S

Fig 1. CC/CV Control for Switching Adapters

Pin Descriptions

Pin

Name

Function

1

OUT1

Output of Op-amp 1

2

IN1-

Negative terminal of Op-amp 1

3

IN1+

Positive terminal of Op-amp 1, connected to internal reference voltage

4

GND

Ground

5

IN2+

Positive terminal of Op-amp 2

6

IN2-

Negative terminal of Op-amp 2

7

OUT2

Output of Op-amp 2

8

VCC

Supply voltage

±

±