AN1695 STMicroelectronics, AN1695 Datasheet

no-image

AN1695

Manufacturer Part Number
AN1695
Description
TSM108 EVALUATIN BOARD 12V TO 6V DC/DC CONVERTER
Manufacturer
STMicroelectronics
Datasheet
AN1695
APPLICATION NOTE
TSM108 EVALUATION BOARD
12V to 6V DC/DC CONVERTER
by Anthony BOIMOND
1 - Introduction
The TSM108 is a step down controller that features constant voltage and constant current regulation. It
can drive either a P-channel Mosfet or a PNP bipolar transistor. The principle of operation of the TSM108
is widely described in the application note attached to the datasheet. The goal of this document is to
describe the TSM108 Evaluation Board.
The Evaluation Board was designed to allow different converter configurations. Several options for power
semiconductor footprints are available on the PCB in order to make it adaptable to a wide range of
converter output power. In a first step, this application note will describe the typical application. Then the
various options available on the Evaluation Board PCB will be explained.
2 - TSM108 typical application
2.1 Description
The TSM108 is especially suited for cigarette lighter accessories. The typical application described in this
note is a battery charger with the following characteristics:
Input voltage: Vin = 12V
Output voltage: Vout = 6V
Maximum output current: Iout = 800mA
A picture of the Evaluation Board in the typical application configuration is shown on Figure 1. The related
schematic is described on Figure 2.
Figure 1 : TSM108 Evaluation Board
January 2003
1/5

Related parts for AN1695

AN1695 Summary of contents

Page 1

... Input voltage: Vin = 12V Output voltage: Vout = 6V Maximum output current: Iout = 800mA A picture of the Evaluation Board in the typical application configuration is shown on Figure 1. The related schematic is described on Figure 2. Figure 1 : TSM108 Evaluation Board January 2003 APPLICATION NOTE TSM108 EVALUATION BOARD 12V to 6V DC/DC CONVERTER AN1695 by Anthony BOIMOND 1/5 ...

Page 2

... AN1695 - APPLICATION NOTE Figure 2 : Typical application schematic Vin C4 U1 VCC 1 !STBY TSM108 The list of components used in the typical application board is shown in the bill of material here below. All other components are not mounted. Passive components like capacitors and resistors used in this Evaluation Board are through-hole components to be more easily changed by the user ...

Page 3

... Figure 5 : Efficiency of the DC/DC converter versus output power and input voltage Efficiency vs. Output Power @ Vout=6V Vin=12V 94% 92% 90% 88% 86% 84% 82% 0 1000 2000 Pout (mW) 200 300 400 500 Iout (mA) Efficiency vs. Input Voltage @ Vout=6V Pout=4,0W 94% 92% 90% 88% 86% 84% 82% 3000 4000 5 AN1695 - APPLICATION NOTE 600 700 800 900 Vin (V) 25 3/5 ...

Page 4

... AN1695 - APPLICATION NOTE 3 - Evaluation board description The TSM108 evaluation board is easily adaptable to a wide range of output power. Several options are available on the board for the power semiconductor packages. Figure 4 shows the electrical connections of all the components available on the Evaluation Board printed circuit board. ...

Page 5

... Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom Package TO220 D2PAK half SO8 TO92 TO220 or axial half SO8 STMicroelectronics GROUP OF COMPANIES © http://www.st.com AN1695 - APPLICATION NOTE Pinout (topview ...

Related keywords