TLE6361 datasheet(2/7 Pages) INFINEON

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AP SU P 01

T L E 6361 Application Boar d 1.1

Application Note, Version 1.0

page 1 of 5

2001-09-21

1. Introduction

This Application Note is intended to provide

information about how to operate the multi-

voltage power supply TLE 6361 Application

Board 1.1 (see marking) and how to use the SPI

software to control some of the functions of the

TLE 6361.

2. Board Components

In the following figures the top and bottom side

of the three layers application board are shown

with a description of the components mounted

on it. The middle layer is a GND plain for best

EMI behaviour.

Figure 1: Top side

Figure 2: Top side

On the top side of Figure 1 you find the SPI

connectors which make the communication

between the board and the e.g. parallel port of a

PC possible. There are two kinds of connectors

available, just one has to be used according to

the application’s needs.

For reverse polarity protection a silicon

diode is foreseen, when having problems with

minimum input voltage requirements the diode

can be shorted or replaced by e.g. a PMOS-

constructed protection.

As one of the input caps a 100µF electrolythic

capacitor is put onto the board, lower values are

also sufficient for proper operation but the ripple

seen at the battery line will increase.

To determine the output voltages of the

two linear regulators LDO2 and LDO3 the

selection jumper has to be set accordingly. In

jumper position 1 the linear regulator two will

have an output voltage of 2.6V where linear

regulator three sets its output voltage to 3.3V. At

position 2 we get 2.6V at LDO2 and 5.0V at

LDO3 and at jumper position

⊥ the output

voltages settle to 3.3V LDO2 and 5.0V LDO3.

LDO1 will always have an output voltage of 5V.

Considering the remaining connectors

on Figure 1 and Figure 2 you will find as inputs

the battery connection, the wake up and the

GND near the outputs Not Error, STBY-

Regulator, Trackers 1 to 6, Linear Regulators 1

to 3, Resets 1 to 3 and the pre-regulated output

voltage of the Buck converter.

Figure 3: Bottom side

The passive components needed for proper

operation of the buck converter you find at the

bottom side. For the freewheeling diode a

schottky diode is recommended to keep the

SPI connectors

Input Cap,

electrolythic

Reverse polarity

protection,

Si-Diode

LinReg 2 and 3

output voltage

selection

LDO2=2.6V

LDO3=3.3V

LDO2=3.3V

LDO3=5.0V

LDO2=2.6V

LDO3=5.0V

Battery

Signal Ground

Not Error

STBY Reg.

V-Tracker 1

V-Tracker 2

V-Tracker 3

Wake up pin

Buck output

LinReg 1

LinReg 2

Reset 3

Reset 2

Reset 1

Input Filter Space

Input Caps,

ceramic

Buck Output Cap,

low ESR tantalum

Slew resistor

Buck Freewheeling

Diode

Buck Inductance

Trackers

Output Caps,

ceramic

SPI resistors

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