austriamicrosystems AG
is now
ams AG
The technical content of this austriamicrosystems application note is still valid.
Contact information:
Headquarters:
ams AG
Tobelbaderstrasse 30
8141 Unterpremstaetten, Austria
Tel: +43 (0) 3136 500 0
e-Mail: ams_sales@ams.com
Please visit our website at www.ams.com
1 General Description
The AS3665 is a capacitive low noise charge pump
with 9 current sources. The charge pump
automatically switches between 1:1 and 1:1.5
modes. The connected current sources have a very
low voltage compliance to improve efficiency of the
whole system. Three current sources have the
possibility to operate either from VBAT or VCP
(especially useful for red LEDs).
The internal control is done by command based
pattern generators implemented by three
sequencers. These commands are optimized for
lighting applications (e.g. ramp up brightness
logarithmically). It includes high level commands
like conditionals jumps and variables. Any of the
three sequencers can be dynamically mapped to
any of the 9 PWM generators for the LEDs.
The AS3665 supports an audio input and
sophisticated light patterns can be controlled by
internal digital filters. The AS3665 is controlled by
I
2C mode. Synchronization over several AS3665 is
possible by the TRIG pin.
The AS3665 is available in a space-saving WL-
CSP-25 (2.5x2.5mm) 0.5mm pitch and operates
over the -30ºC to +85ºC temperature range.
2 Key Features
• High efficiency capacitive 150mA charge pump
with 1:1, 1:1.5 and 1:2 modes with automatic
mode switching; 1:2 mode can be disabled
• 9 Channel High Side 20mA Current sources
o Less than 50mV at 10mA dropout voltage
o LED7,8,9 either powered by VBAT or VCP
• Advanced Command based Pattern Generator
o 96 x 16 bits program memory
o Dedicated lighting commands like logarithmic
fade
o Programming control and conditional jumps
• Audio Controlled Lighting with internal digital
filters
• 3 Sequencers
o Dynamically mapped to 9 PWM generators
o Internal/External Synchronization
• 9 PWM generators (12 bit resolution)
o Automatic RGB Color Correction by TAMB
• I2C interface with dedicated EN pin
• Available in WL-CSP-25 (2.5x2.5mm) 0.5mm
pitch
3 Applications
RGB/White Fun or Event LED for mobile phones or
portable devices; Lighting Management Unit.
4 Application Diagramm
AS3665
9 Channel Advanced Command Driven RGB/White LED Driver
Preliminary Application Note, Confidential
ams AG
Technical content still valid
AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 2 - 25
Table of Contents
1 GENERAL DESCRIPTION ................................................................................................................... 1
2 KEY FEATURES ................................................................................................................................. 1
3 APPLICATIONS.................................................................................................................................. 1
4 APPLICATION DIAGRAMM ................................................................................................................. 1
5 OTHER APPLICABLE DOCUMENTS AND PAPERS ............................................................................. 3
6 FURTHER APPLICATIONS ................................................................................................................. 3
7 REVISION STATUS ............................................................................................................................ 3
8 GENERAL DESCRIPTION ................................................................................................................... 3
9 GETTING STARTED ........................................................................................................................... 4
9.1 AS3665 Demo Software Installation ......................................................................................................... 4
9.2 Connecting the Demoboard and USB Box with the PC ............................................................................ 5
9.3 Starting the AS3665 Demo software......................................................................................................... 6
9.4 First Steps................................................................................................................................................. 7
10 HARDWARE ................................................................................................................................ 8
10.1 AS3665 Mobile demoboard 1V1 .......................................................................................................... 8
10.1.1 AS3665 mobile demoboard: Connector, jumper and device locations ............................................ 8
10.1.2 AS3665 mobile demoboard :Application Schematic...................................................................... 10
10.1.3 AS3665 mobile demoboard: Stackup ............................................................................................ 11
10.1.4 AS3665 mobile demoboard: Layout (top view).............................................................................. 12
10.1.5 AS3665 mobile demoboard: Layout (IN1 view) .............................................................................13
10.1.6 AS3665 mobile demoboard: Layout (IN2 view) .............................................................................14
10.1.7 AS3665 mobile demoboard: Layout (bottom view)........................................................................ 15
10.2 Dual Demoboard 1V0......................................................................................................................... 16
10.2.1 AS3665 dual demoboard: Connector, jumper and device locations .............................................. 16
10.2.2 AS3665 dual demoboard :Application Schematic ......................................................................... 17
10.2.3 AS3665 dual demoboard: Stackup................................................................................................ 18
10.2.4 AS3665 dual demoboard: Layout (top view) ................................................................................. 19
10.2.5 AS3665 dual demoboard: Layout (IN1 view)................................................................................. 20
10.2.6 AS3665 dual demoboard: Layout (IN2 view)................................................................................. 21
10.2.7 AS3665 dual demoboard: Layout (bottom view)............................................................................ 22
11 PATTERN GENERATOR ............................................................................................................ 23
11.1 LED Sequence Generator.................................................................................................................. 23
11.2 Multi Chip Sequence Generator......................................................................................................... 24
ams AG
Technical content still valid
AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 3 - 25
5 Other applicable documents and papers
Data Sheet: AS3665 0v1.5
AS3665 Programming Guide
6 Further Applications
Applications based on the AS3665 are continuously updated. Visit our home-page:
http: //www.austriamicrosystems.com
7 Revision status
AS3665 Datasheet Rev.: 0v1.5
AN3665 Application note (this document): Rev.: 1v0
AS3665 mobile Demoboard schematic: Rev.: 1v1
AS3665 mobile Demoboard layout Rev.: 1v1
AS3665 dual Demoboard schematic: Rev.: 1v0
AS3665 dual Demoboard layout Rev.: 1v0
AS3665 Software version Rev.: 3v0
8 General description
Remark: all subsequent component numbering refers to the application schematics, shown in pt. Application
Schematic.
ams AG
Technical content still valid
AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 4 - 25
9 Getting Started
9.1 AS3665 Demo Software Installation
Start the demo software Installation Shield with “Install Demo Software”.
Specify the installation folder.
The Install Shield will guide you through the rest of the installation.
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 5 - 25
Connecting the Demoboard and USB Box with the PC
After the successful installation of the demo software, the USB Box can be connected to the PC and to the
demoboard as shown in the pictures below.
Connecting the mobile demoboard 1V1
Connecting the dual demoboard 1V0
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 6 - 25
9.2 Starting the AS3665 Demo software
The correct installed demo software can be started from Start > Programs > austriamicrosystems AG > AS3665
Demosoftware. When starting the demosoftware the first time, the firmware of the USB-box has to be updated.
To do this, follow the steps which are shown on the screen. After the successful update of the firmware you can
start working with AS3665 demoboards.
Now it should be indicated in the lower left corner of the demo-software, that the USB-box is connected correctly
and that the firmware was updated successfully.
The different register settings can be changed through the GUI of the demosoftware, additionally you can use the
register table to change single bits. The register table can be opened by clicking the button “Registers”. The GUI
settings are periodically updated by activating the ‘register polling’ checkbox.
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 7 - 25
9.3 First Steps
To create the first patterns do as described in the following:
Set the bit for chip enable:
This can be done either by clicking the checkbox above or by setting bit 6 at the address 00h.
Enable the current sources:
So change to the “current sources”- tab and set the checkbox “Const On” beneath “All current sources” to enable
all current sources. Then set the LED currents by setting “current” and “LedMax” , for instance to 255 and
25.5mA.
After this you can start programming, either manually or by using the Led Sequence generator, if you do it
manually you have to compile the code after writing by pressing the compile-button, if you generate a pattern
using the sequence generator you have to press the button “generate code” after drawing the sequence. In both
cases you just have to press two buttons afterwards. At first it is the “LoadToChip”-Button and then the “Run”-
Button or rather the “Run All”-button in the “Programming”-tab.
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 8 - 25
10 Hardware
There are two types of Demoboards available for AS3665, namely the mobile and the dual demoboard. The
mobile demoboard is shaped like a mobile phone and the LEDs are placed like in a mobile phone. The dual
demoboard features two AS3665, which are connected together. So this board gives you the opportunity to test
the synchronization of two AS3665, by using the Trig-input. It is possible to connect up to eight AS3665 together
by connecting different resistors to the ADDR-pin.
10.1 AS3665 Mobile demoboard 1V1
10.1.1 AS3665 mobile demoboard: Connector, jumper and device locations
Listed below are the various connectors and jumpers.
Jumper
Function
Description
J39 Connects LEDs to GND Connected LEDs: white LEDs on the left and right side of the board
J40 Connects LEDs to GND Connected LEDs: white LEDs of the circle in the middle of the board
J41 Connects LEDs to GND Connected LEDs: the three RGB-LEDs
J43 Connects LEDs to GND Connected LEDs: white LEDs which form a bar beneath the
austriamicrosystems logo
J60 USB Box Interface Connector
PWR Measurement pins Vbat, CPout, GND
DIGI Measurement pins GND, ADDR, INT,CLK32K, TRIG, EN, C2V5, SDA, SCL
LED Measurement pins LED1, LED2, LED3, LED4, LED5, GND
LED Measurement pins LED6, LED7, LED8, LED9, GPO, GND
BU1 Positive battery supply Main battery supply
BU2 Negative battery supply Main battery ground
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 9 - 25
Connector and Jumper locations on AS3665 Mobile Demoboard V1.1
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 10 - 25
10.1.2 AS3665 mobile demoboard :Application Schematic
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 11 - 25
10.1.3 AS3665 mobile demoboard: Stackup
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 12 - 25
10.1.4 AS3665 mobile demoboard: Layout (top view)
Layout (top view)
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 13 - 25
10.1.5 AS3665 mobile demoboard: Layout (IN1 view)
Layout (IN1 view)
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 14 - 25
10.1.6 AS3665 mobile demoboard: Layout (IN2 view)
Layout (IN2 view)
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 15 - 25
10.1.7 AS3665 mobile demoboard: Layout (bottom view)
Layout (bottom view)
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 16 - 25
10.2 Dual Demoboard 1V0
10.2.1 AS3665 dual demoboard: Connector, jumper and device locations
Listed below are the various connectors and jumpers.
Jumper
Function
Description
J1 Connects LEDs to GND Connected LEDs: 6 RGB-LEDs which form a circle
J2 Connects LEDs to GND Connected LEDs: 6 RGB-LEDs which form a bar
J60 USB Box Interface Connector
J62 Measurement pins GPO2, GPO1,GND
J63 Measurement pins VBAT, EN, GND
BU1 Positive battery supply Main battery supply
BU2 Negative battery supply Main battery ground
Connector and Jumper locations on AS3665 Dual Demoboard V1.0
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 17 - 25
10.2.2 AS3665 dual demoboard :Application Schematic
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 18 - 25
10.2.3 AS3665 dual demoboard: Stackup
ams AG
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AS3665
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 1.0 / 20081015 19 - 25
10.2.4 AS3665 dual demoboard: Layout (top view)
Layout (top view)
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