AMS AS3635
The AMS AS3635 is a highly integrated photoflash charger with a built-in IGBT driver, making it ideal for use in mobile phones, PDAs, and DSCs. With its small size and low power consumption, the AS3635 is a great choice for space-constrained applications.
Some of the key features of the AS3635 include:
- Built-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
- Average input current < 320mA
- Few external components
- No Schottky-Diode needed
AMS AS3635
The AMS AS3635 is a highly integrated photoflash charger with a built-in IGBT driver, making it ideal for use in mobile phones, PDAs, and DSCs. With its small size and low power consumption, the AS3635 is a great choice for space-constrained applications.
Some of the key features of the AS3635 include:
- Built-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
- Average input current < 320mA
- Few external components
- No Schottky-Diode needed
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
AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 1 - 13
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=22µF
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
AS3635
Xenon Flash driver with 5V IGBT control
Preliminary Application Note
ams AG
Technical content still valid
AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 2 - 13
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 AS3635 WLP DEMOBOARD A02 CONNECTOR, JUMPER AND DEVICE LOCATIONS ........................ 7
10 APPLICATION SCHEMATIC AS3635 DEMOBOARD A02 ................................................................... 9
11 AS3635 WLP DEMOBOARD A02: LAYOUT (TOP VIEW).................................................................. 10
12 AS3635 WLP DEMOBOARD A02 LAYOUT (BOTTOM VIEW) ........................................................... 10
13 OPERATING MODES...................................................................................................................... 11
13.1 Simple Logic Mode............................................................................................................................. 11
13.2 I²C-Mode ............................................................................................................................................ 12
ams AG
Technical content still valid
AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 3 - 13
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): Rev.: 1v0
AN3635_In_Production_Trimming Rev:: 1v0
AS3635 WLP Demoboard schematic: Rev.: A02
AS3635 WLP Demoboard layout Rev.: A02
AS3635 Software version Rev.: 2v0
7 General description
Remark: all subsequent component numbering refers to the application schematics, shown in pt. Application
Schematic.
ams AG
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AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 4 - 13
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.
ams AG
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AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 5 - 13
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.
ams AG
Technical content still valid
AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 6 - 13
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.
ams AG
Technical content still valid
AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 7 - 13
9 AS3635 WLP Demoboard A02 connector, jumper and device
locations
Listed below are the various connectors and jumpers.
Jumper
Function
comment
J1 USB Box Interface Connector
J2 GND
J3 Vprog connector
J4 Test point TP on Cflash1
J5 Test point TP on trigger of the Xenon Tube
J6 Test point TP on the primary side of T1
J7 Test point TP on the IGBT base
J9 ESD test Connector to perform ESD tests
J10,J11,
J12
spark gaps spark gaps for ESD protection
BU1 Vbat Main battery supply
BU2 GND Main battery GND
Device
Value
comment
U1 AS3635 Xenon Flash driver with 5V IGBT control
U2 FSA5157 Analog switch, used for OTP
U3
BAS21DW5T1G
High voltage switching diode
RJP4002ANS IGBT ; 2.5V drive voltage
Q1
RJP4003ANS IGBT ; 4V drive voltage
TTRN-3825H 7µH ; 3.8x3.8x2.5mm ; Tokyo Coil
T1
TTRN-5820H 8.87µH ; 5.8x5.8x2 ; Tokyo Coil
T2
BO-02 7.3x.2.5x2.2 ; Tokyo Coil
D2 Red LED Indicator for end of charge
D3 Red LED Indicator for charging
Cflash1 28.5µF / 330V low ESR photoflash capacitor
Rtrig1 470kR / 1MR / 400V / 0805
Ctrig1 33nF / 400V / 1206 GR731BW0BB333KW01L
Xflash1 Xenon Flash tube
Cvbat1 4.7uF / X7R / 10V / 0603
C1 100µF / Tantal Input buffer capacitor
C2 10nF / 0603
C3 10µF /0603
C6 470nF / 0603
R3,R4,R9
0R / 0603
R5,R6 10k / 0603
R7,R8 47k Pull down resistors on pin FLASH, pin CHARGE
R10 47k Pull up resistor on pin XDONE
R11,R12,
R13
1.5k
S1 Flash switch microminiature tact switch SMT
S4 Charge switch SMT slide switch
ams AG
Technical content still valid
AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 8 - 13
Connector and Jumper locations on AS3635 WLP Demoboard A02
ams AG
Technical content still valid
AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 9 - 13
10 Application Schematic AS3635 Demoboard A02
Application Schematic AS3635 Demoborad A02
ams AG
Technical content still valid
AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 10 - 13
11 AS3635 WLP Demoboard A02: Layout (top view)
Layout (top view)
12 AS3635 WLP Demoboard A02 Layout (bottom view)
Layout (bottom view)
ams AG
Technical content still valid
AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 11 - 13
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:
ams AG
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AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 12 - 13
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
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.
ams AG
Technical content still valid
AS3635
Preliminary Application Note
www.austriamicrosystems.com (mtp) Revision 0.1 / 20080205 13 - 13
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
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
or flow out of austriamicrosystems AG rendering of technical or other services.
Contact Information
Headquarters
austriamicrosystems AG
A-8141 Schloss Premstätten, Austria
T. +43 (0) 3136 500 0
F. +43 (0) 3136 5692
For Sales Offices, Distributors and Representatives, please visit:
http://www.austriamicrosystems.com/contact
ams AG
Technical content still valid
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AMS AS3635
The AMS AS3635 is a highly integrated photoflash charger with a built-in IGBT driver, making it ideal for use in mobile phones, PDAs, and DSCs. With its small size and low power consumption, the AS3635 is a great choice for space-constrained applications.
Some of the key features of the AS3635 include:
- Built-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
- Average input current < 320mA
- Few external components
- No Schottky-Diode needed
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