austriamicrosystems AG is now
ams AG
The technical content of this austriamicrosystems document is still valid.
Contact information:
Headquarters: ams AG
Tobelbaderstrasse 30
8141 Unterpremstaetten, Austria
Tel: +43 (0) 3136 500 0 e-Mail: [email protected]
Please visit our website at www.ams.com
AS1341 - Evaluation Board
Application Note
AS1341
Evaluation Board Application Note
AG
Technical still valid www.austriamicrosystems.com Revision 1.01 1 - 5
AS1341 - Evaluation Board
Application Note
General Description
Board Description
J
K
L
M
Figure 1: Board Description
Connector Description
Label
A
B
C
D
E
F
Name
VIN
GND
SHDNN
OUT
GND
POK
Description
Input Voltage
Ground
Enable Jumper
Power Output Connector
Ground
Power-OK Signal
Info
Input voltage ranging from 4.5V to 20V AG still valid
Jumper Description
Label
G
H
I
Name
ILIM:
HIGH/LOW
ON/OFF
3.3V 5V
Description ams Info
LOW I LIMIT : 0.7A
HIGH I LIMIT : 1.4A
ON content
Measurement Points Description
5V
Label Name Description Info
LX
VIN
GND
OUT
External Conductor
Power Supply Connectors for
VIN and GND.
Power Output Connector
Technical www.austriamicrosystems.com Revision 1.01 2 - 5
AS1341 - Evaluation Board
Application Note
Operational sequence
This evaluation board comes with the AS1341.
1. If not present get the datasheet for the AS1341 from www.austriamicrosystems.com
. Drive the IC on the
Demoboard only with the recommended settings and values as described in the datasheet.
2. Connect a 4.5V to 20V power supply (VIN “A” and GND “B”).
3. Perform measurements at the measurement points “J” to “M”.
If there are questions do not hesitate to contact us. See contact information at the end of the application note.
Optional Features
Setting the output voltage
The AS1341 has a default output voltage of 5V if FB is set to GND. Additionally the output voltage can be set valid between 1.25 and V IN via an additionally resistor R1 & R2. The required resistor value for a certain output voltage can be calculated as shown in equation 1.
R1 = 360k Ω
R2 = 220k Ω
V
FB
= 1.25V
R1=R2*(V OUT /V FB -1) (Eq1) AG and Jumpers “I” must be set to 3.3V. still
Using the current limiter
AS1341 either to GND or to V CC
Technical content www.austriamicrosystems.com Revision 1.01 3 - 5
AS1341 - Evaluation Board
Application Note
Layout of evaluation board
Board schematics and layout
Figure 3: Schematics
AG ams
C1
C2
L1
R1
R2
R3
D1
Figure 4: Top view
Assembly List
Label Info
10µF, 25V, X7R
100µF, 10V
10µH, 85m Ω , 1.6A
360k Ω
220k Ω
120 Ω
Schottky Diode
Technical
Type
GRM32DR71E106KA12L
T520V107M010ATE018
MSS6132-103
MBR120VL still valid
Manufacturer
Murata
Kemet
Coilcraft www.austriamicrosystems.com Revision 1.01 4 - 5
AS1341 - Evaluation Board
Application Note
Copyright
Copyright © 1997-2008, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-
Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information.
This product is intended for use in normal commercial applications. Applications requiring extended temperature valid austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location.
The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, AG still
Contact Information
Headquarters austriamicrosystems AG
A-8141 Schloss Premstätten, Austria
T. +43 (0) 3136 500 0
F. +43 (0) 3136 5692 Technical www.austriamicrosystems.com Revision 1.01 5 - 5
