•

1.24V SERIES VOLTAGE RERFERENCE WITH 10mA OUTPUT

CURRENT AND 1% PRECISION

•

TWO OPERATIONAL AMPLIFIERS WITH ORED OUTPUT AND

1MHZ GAIN BANDWIDTH PRODUCT

•

BUILT-IN CURRENT GENERATOR WITH ENABLE/DISABLE

FUNCTION

•

4.5 TO 32V SUPPLY VOLTAGE RANGE

•

SO8 AND DIP8 PACKAGES

DESCRIPTION

The FTSM101A integrated circuit incorporates a high stability series

band gap voltage reference, two ORed operational amplifiers and a cur-

rent source.

This IC compares the DC voltage and the current level a the output of a

switching power supply to an internal reference. It provides a feedback

through an optocoupler to the PWM controller IC in the primary side.

The controlled current generator can be used to modify the level of cur-

rent limitation by offsetting the information coming from the current sen-

sing resistor.

APPLICATIONS

This circuit is designed to be used in battery chargers with a constant

voltage and a limited output current.

It can be used in every types of application requiring a precision

voltage regulation and current limitation.

Other applications include voltage supervisors, over voltage

protection

ORDER CODE

Package

Part

Number

Temperature Range

N

D

KGM101AI

-40ºC, +105ºC

•

•

N = Dual in Line Package (DIP)

D = Small Outline Package (SO) – also available in Tape & Reel (DT)

1

3

4

2

8

6

5

7

+

-

+

-

Vref

N

DIP8

Plastic Package

D

SO-8

Plastic Micropackage

ORDERING NUMBER:

FTSM

101AN

Plastic Package

FTSM

101AD

Plastic Micropackage

FTSM101A VOLTAGE AND CURRENT CONTROLLER