high performance needs great design.
Application Note: AS3661 Programmable 9-channel LED Driver
Please be patient while we update our brand image as austriamicrosystems and TAOS are now ams.
www.ams.com
Application Note: AS3661 AN01
Evalboard 4v1 Description
AS3661
Programmable 9-channel LED Driver
1. General Description
The AS3661 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control. The AS3661 maintains excellent efficiency over a wide operating range by autonomously selecting the best charge pump gain based on
LED forward voltage requirements. AS3661 is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption sown to 10uA (typ).
www.ams.com Revision 2.0 / 2011/06/16
AS3661 – AN01 – Demoboard
Application Note: Evaluation Board Guide
Table of Contents
0
1.
General Description ............................................................................................................... 0
2.
Further Applications ............................................................................................................... 2
3.
Revision Status ...................................................................................................................... 2
4.
Getting Started HW & SW ..................................................................................................... 2
5.
Jumper Descriptions .............................................................................................................. 3
6.
Application Schematic ........................................................................................................... 4
7.
Layout – 3D Top .................................................................................................................... 5
8.
Layout – 3D Bottom ............................................................................................................... 5
9.
Layout – Top Layer ................................................................................................................ 6
10.
Layout – Inner Layer1 ............................................................................................................ 7
11.
Layout – Inner Layer2 ............................................................................................................ 8
12 Layout – Bottom Layer ............................................................................................................. 9
Copyright ..................................................................................................................................... 10
Disclaimer ................................................................................................................................... 10 www.ams.com Revision 2.0 / 6/22/12 page 1/10
AS3661 – AN01 – Demoboard
Application Note: Evaluation Board Guide
2. Further Applications
Visit our website for further information www.ams.com
3. Revision Status
AS3661 – AN01 Eval Board – for Evalboard 4v1
4. Getting Started HW & SW
1) Install the AS3661 EvalSW from the USB Flash Memory onto your Computer
2) Connect the Battery to the VBAT and GND connectors of the Board
3) Connect the USBBox with the Computer
4) Connect the USBBox with the 6-pin Header cable & connect the cable to
Connector J1.
www.ams.com Revision 2.0 / 6/22/12 page 2/10
AS3661 – AN01 – Demoboard
Application Note: Evaluation Board Guide
J23
J22
J7
J8
J6
J2
J4
J5
5. Jumper Descriptions
Jumper Function
J25 VBAT = VUSB
Jumper
Setting open
VBAT = VEN
INT pull-up
TRIG pull-up
I2C Pull-ups
White LED GND
RGB LED GND
VDD CLK
CLK OUT closed closed closed closed closed open open closed
Comment
Do not connect Battery & USB at the same time!
To connect VEN to VBAT
Enables the pull-up resistor for INT
Enables the pull-up resistor for TRIG
Connected from I2C Pull-up to VBAT
Connect the WHITE LEDs to GND
Connect the RGB LEDs to GND
Supply’s the Oscillator
Connects the Oscillator with the IC www.ams.com Revision 2.0 / 6/22/12 page 3/10
AS3661 – AN01 – Demoboard
Application Note: Evaluation Board Guide
6. Application Schematic
www.ams.com Revision 2.0 / 6/22/12 page 4/10
AS3661 – AN01 – Demoboard
Application Note: Evaluation Board Guide
7. Layout – 3D Top
8. Layout – 3D Bottom
www.ams.com Revision 2.0 / 6/22/12 page 5/10
AS3661 – AN01 – Demoboard
Application Note: Evaluation Board Guide
9. Layout – Top Layer
www.ams.com Revision 2.0 / 6/22/12 page 6/10
AS3661 – AN01 – Demoboard
Application Note: Evaluation Board Guide
10. Layout – Inner Layer1
www.ams.com Revision 2.0 / 6/22/12 page 7/10
AS3661 – AN01 – Demoboard
Application Note: Evaluation Board Guide
11. Layout – Inner Layer2
www.ams.com Revision 2.0 / 6/22/12 page 8/10
AS3661 – AN01 – Demoboard
Application Note: Evaluation Board Guide
12 Layout – Bottom Layer
www.ams.com Revision 2.0 / 6/22/12 page 9/10
AS3661 – AN01 – Demoboard
Application Note: Evaluation Board Guide
Copyright
Copyright © 1997-2012, ams AG, Tobelbader Strasse 30, 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 ams AG are covered by the warranty and patent indemnification provisions appearing in its
Term of Sale. ams 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. ams
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 ams AG for current information.
This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life sustaining equipment are specifically not recommended without additional processing by ams 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 ams AG is believed to be correct and accurate. However, ams 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, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services.
Contact Information
Headquarters ams AG
Tobelbader Strasse 30
8141 Unterpremstaetten
Austria
T. +43 (0) 3136 500 0
For Sales Offices, Distributors and Representatives, please visit:
http://www.ams.com/contact
www.ams.com Revision 2.0 / 6/22/12 page 10/10
