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
Please visit our website at
www.ams.com
AS3635
Preliminary Application Note
1 General Description
The AS3635 is a highly integrated photoflash charger with build in IGBT driver.
A build in 5V charge-pump guaranties constant
IGBT drive at any battery voltage. The build in timer turns off the charge-pump one minute after charging.
In circuit fuse trimming allows to set the voltage on the photoflash capacitor to ±3% accuracy.
The AS3635 is available in a space-saving WL-CSP package measuring only 1.5mm x 1.5mm and operates over the -30ºC to +85ºC temperature range.
Warning:
Lethal voltages are present on applications using AS3635! Do not operate without training to handle high voltages.
2 Key Features
Build in 5V charge-pump for IGBT gate drive
Photoflash voltage accuracy programmable to
±3% (in circuit One Time Programmable - OTP)
Trip voltage accuracy ±1%
Small Size 1.5mm x 1.5mm x 0.6mm
PCB: No microvias need
Average input current < 320mA
Few external components
No Schottky-Diode needed
No output voltage divider needed
Reliable Flash on/off for IGBT timing.
Charge time < 4sec @ Vbat>2.7V,
C
FLASH
=22
µ
F
Charge complete indicator
Undervoltage lockout
Available in a tiny WL-CSP Package
3x3 balls 0.5mm pitch, 1.5x1.5mm package size
3 Application
Xenon Flash driver for mobile phones, PDA and
DSC
.
Typical operating circuit www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 1 - 13
AS3635
Preliminary Application Note
Table of Contents
1 GENERAL DESCRIPTION ................................................................................................................. 1
2 KEY FEATURES............................................................................................................................... 1
3 APPLICATION.................................................................................................................................. 1
4 OTHER APPLICABLE DOCUMENTS AND PAPERS........................................................................... 3
5 FURTHER APPLICATIONS ............................................................................................................... 3
6 REVISION STATUS .......................................................................................................................... 3
7 GENERAL DESCRIPTION ................................................................................................................. 3
8 GETTING STARTED ......................................................................................................................... 4
8.1
AS3635 Demo Software Installation ......................................................................................................... 4
8.2
Connecting the Demoboard and USB Box with the PC ............................................................................ 5
8.3
Starting the AS3635 Demo software......................................................................................................... 6
9
10
AS3635 WLP DEMOBOARD A02 CONNECTOR, JUMPER AND DEVICE LOCATIONS ........................ 7
APPLICATION SCHEMATIC AS3635 DEMOBOARD A02 ................................................................... 9 valid
11 AS3635 WLP DEMOBOARD A02: LAYOUT (TOP VIEW).................................................................. 10
12 AS3635 WLP DEMOBOARD A02 LAYOUT (BOTTOM VIEW) ........................................................... 10
13
13.1
Simple Logic Mode............................................................................................................................. 11
13.2
OPERATING MODES...................................................................................................................... 11
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AS3635
Preliminary Application Note
4 Other applicable documents and papers
Data Sheet: AS3635 1v1
Application Note
5 Further Applications
Applications based on the AS3635 are continuously updated. Visit our home-page:
http: //www.austriamicrosystems.com
6 Revision status
AS3635 Datasheet Rev.: 1v1
AN3635 Application note (this document):
AN3635_In_Production_Trimming
AS3635 WLP Demoboard schematic:
AS3635 WLP Demoboard layout
AS3635 Software version
7 General description
Rev.: 1v0
Rev:: 1v0
Rev.: A02
Rev.: A02
Rev.: 2v0
Remark: all subsequent component numbering refers to the application schematics, shown in pt. Application
Schematic.
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AS3635
Preliminary Application Note
8 Getting Started
8.1 AS3635 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.
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AS3635
Preliminary Application Note
8.2 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 picture below.
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AS3635
Preliminary Application Note
8.3 Starting the AS3635 Demo software
The correct installed demo software can be started from Start > Programs > austriamicrosystems AG > AS3635
Demosoftware. USB connection is immediately indicated in the status bar of the demo software. By pressing the
“Read All Register”- button all register value can be readout and the chip version is indicated in the status bar
GUI.
The GUI settings are periodically updated by activating the ‘Chip polling’ checkbox.
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AS3635
Preliminary Application Note
9
AS3635 WLP Demoboard A02 connector, jumper and device locations
Listed below are the various connectors and jumpers.
Jumper Function
J1
J2
USB Box Interface Connector
GND comment
J3
J4
J5
J6
J7
J9
J10,J11,
J12
BU1
BU2
Device
U1
U2
U3
Q1
T1
T2
D2
Vprog connector
Test point
Test point
Test point
Test point
ESD test spark gaps
Vbat
GND
AS3635
FSA5157
RJP4002ANS
RJP4003ANS
TTRN-3825H
TTRN-5820H
BO-02
Value
BAS21DW5T1G
TP on Cflash1
TP on trigger of the Xenon Tube
TP on the primary side of T1
TP on the IGBT base
Connector to perform ESD tests spark gaps for ESD protection
Main battery supply
Main battery GND
Analog switch, used for OTP
High voltage switching diode
IGBT ; 2.5V drive voltage
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7.3x.2.5x2.2 ; Tokyo Coil
Indicator for end of charge comment
Xenon Flash driver with 5V IGBT control
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Red LED
C3
C2
C1
D3 Red LED
Cflash1 28.5µF / 330V
Rtrig1
Ctrig1
470kR / 1MR / 400V / 0805
33nF / 400V / 1206
Xflash1 Xenon Flash tube
Cvbat1 4.7uF / X7R / 10V / 0603
Indicator for charging
ams
100µF / Tantal
GR731BW0BB333KW01L
content
10nF / 0603
10µF /0603
C6 470nF / 0603
R3,R4,R9 0R / 0603
R5,R6 10k / 0603
R7,R8 47k
R10 47k
Pull down resistors on pin FLASH, pin CHARGE
Pull up resistor on pin XDONE
1.5k R11,R12,
R13
S1
S4
Flash switch
Charge switch
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SMT slide switch www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 7 - 13
AS3635
Preliminary Application Note
Connector and Jumper locations on AS3635 WLP Demoboard A02
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AS3635
Preliminary Application Note
10 Application Schematic AS3635 Demoboard A02
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Application Schematic AS3635 Demoborad A02
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AS3635
Preliminary Application Note
11 AS3635 WLP Demoboard A02: Layout (top view)
12 AS3635 WLP Demoboard A02 Layout (bottom view)
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Layout (bottom view) www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 10 - 13
AS3635
Preliminary Application Note
13 Operating Modes
13.1 Simple Logic Mode
In this mode the AS3635 is controlled by using the charge switch and the flash-button. The actual status is indicated by the two LEDs D2 and D3.
The charging of the main capacitor is started when the charge slide switch is switched into ON-position. At the beginning of charging, the LED D3 begins to shine. The end of charging is indicated by LED D2.
Now the flash can be triggered by pressing the flash-button.
After a flash, a new charge cycle can be initiated by switching the charge slide switch back into OFF-position and into ON-position again.
OFF-Position: ON-Position:
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AS3635
Preliminary Application Note
13.2 I²C-Mode
The AS3635 can be controlled in I²C- mode by using the GUI of the demo software.
The following steps are required:
- Checking the check box “Chip Polling”
- Checking the check box “Enable I2C mode”
- Checking the check box “I2C charge”
- when the indicator beside “Xenon Done:” changes its color from red to green the flash capacitor is charged
- after charging, the flash is started by pressing the button “Flash”
- after a flash, a new charge cycle can be initiated by unchecking the checkbox “I2C Charge” and checking it again
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OTP-programming in I²C-mode:
The OTP, which is used for trimming of the charging voltage to cancel inaccuracies of the external components, can be programmed using the OTP-tab of the GUI. For fusing, the programming voltage should be connected to the Vprog connector J3. This way of trimming should is not reliable, because a proper analog read-out of the fused bits can’t be done with the USB-box.
For correct and reliable programming of the OTP please refer to the application note
AN3635_In_Production_Trimming.
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AS3635
Preliminary Application Note
Copyright
Copyright © 1997-2009, 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.
Diclaimer
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 range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might
valid
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, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise
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Contact Information
Headquarters
austriamicrosystems AG
A-8141 Schloss Premstätten, Austria
T. +43 (0) 3136 500 0
F. +43 (0) 3136 5692
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