AN1283 - APPLICATION NOTE

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EVALUATION BOARD - TECHNICAL NOTE

TSM101 integrates in the same 8 pin DIP or SO

package

on the outputs of the operational amplifiers

inhibited thanks to an external pin.

An immediate way to take advantage of the high

integration and reliability of TSM101 is to use it as

a voltage and current controller on power supplies

secondary.

The

application

note

AN1283

describes precisely how to use TSM101 in an

SMPS battery charger.

The TSM101 Evaluation Board is adaptable to any

power supply or battery charger (SMPS or linear)

as a voltage and current controller with minimal

constraints from the user.

HOW TO USE THE TSM101 EVALUATION

BOARD ?

The generic Electrical Schematic is shown on

Figure 7. It represents an incomplete SMPS

power supply where the primary side is simplified.

The

“IN+”and

“IN-” power inputs

of the

evaluation board should be connected directly to

the power lines of the power supply secondary.

The “Vcc” input of the evaluation board should

be connected to the auxiliary supply line.

In the case of an SMPS power supply, the “Reg”

output

of

the

evaluation

board

should

be

connected to the Optocoupler input to regulate the

PWM block in the primary side. In the case of a

linear power supply, the “Reg” output should be

connected to the base of the darlington to regulate

the power output.

A diode might be needed on the output of the

evaluation board in the case of a battery charger

application to avoid the discharge of the battery

when the charger is not connected.

COMPONENTS CALCULATIONS

The voltage control is given by the choice of the

equation 1 :

eq1

The current control is given by the choice of the

linked to the nominal current of the application)

and by the value of the sense resistor itself.

Figure 7: Evaluation board schematic