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CURRENT CONTROL

ENCE

DESCRIPTION

TSM105 is a highly integrated solution for SMPS

applications requiring CV (constant voltage) and

CC (constant current) mode.

TSM105

integrates one voltage reference, two

operational amplifiers (with ORed outputs - com-

mon collectors), and a current sensing circuit.

The voltage reference combined with one opera-

tional amplifier makes it an ideal voltage control-

ler, and the other low voltage reference combined

with the other operational amplifier makes it an

ideal current limiter for output low side current

sensing.

The current threshold is fixed, and precise.

The only external components are:

* a resistor bridge to be connected on the output of

the power supply (adapter, battery charger) to set

the voltage regulation by dividing the desired out-

put voltage to match the internal voltage reference

value.

* a sense resistor whose value and allowable dis-

sipation power need to be chosen according to the

internal voltage threshold.

* optional compensation components (R and C).

TSM105, housed in one of the smallest package

available, is ideal for space shrinked applications

such as adapters and battery chargers.

APPLICATIONS

ORDER CODE

L = Tiny Package (SOT23-5) - only available in Tape & Reel (LT)

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

PIN CONNECTIONS (top view)

Part

Number

Temperature

Range

Package

Marking

LD

TSM105CLT

0 to 85°C

•

M105

TSM105CD

0 to 85°C

•

TSM105

L

SOT23-5

(Plastic Package)

D

SO8

(Plastic Micropackage)

1

2

34

5

Vctrl

Gnd

Vcc

Ictrl

Out

1

2

3

45

6

Vctrl

Gnd

Vcc

Nc

Out

Ictrl

Nc

Nc

SOT23-5

SO8

7

8

September 2001

TSM105

CONSTANT VOLTAGE AND CONSTANT CURRENT

CONTROLLER FOR BATTERY CHARGERS AND ADAPTORS