AMS AS3630 User guide

AMS
Brand
AMS
Model
AS3630
Type
User guide
www.ams.com
Revision 1.1 / 2012/07/21
Application Note: AN01 – 8A Super Cap Flash Driver with
Torch and Indicator
AS3630
8A Super Cap Flash Driver with Torch
and Indicator
strictly confidential
AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 1/20
Table of Contents
1.
General Information ............................................................................................................... 2
2.
Revision Status ...................................................................................................................... 2
3.
Getting Started ...................................................................................................................... 3
4.
Board Startup ........................................................................................................................ 5
5.
Hardware Overview ............................................................................................................. 10
6.
GUI – Software .................................................................................................................... 12
7.
PCB Layer Stackup ............................................................................................................. 17
8.
AS3630 Demoboard1V2 Schematic .................................................................................... 18
9.
Layout (Top View) ............................................................................................................... 19
10.
Layout (Bottom View) .......................................................................................................... 19
Copyright ..................................................................................................................................... 20
Disclaimer ................................................................................................................................... 20
1.1.
Application .................................................................................................................
2
3.1.
Evaluation Software Installation ................................................................................. 3
3.2.
Connecting the Demoboard ....................................................................................... 3
3.3.
Starting the Software ................................................................................................. 4
4.1.
Automatic Readout of Fault Indications ..................................................................... 5
4.2.
Indicator Mode\PWM ................................................................................................. 6
4.2.1.
Application ............................................................................................................. 6
4.2.2.
Operation ............................................................................................................... 6
4.3.
Torch Light ................................................................................................................. 7
4.3.1.
Application ............................................................................................................. 7
4.3.2.
Operation ............................................................................................................... 7
4.4.
Flash Mode ................................................................................................................ 8
4.4.1.
Operation ............................................................................................................... 8
5.1.
AS3630 Demoboard1V2 Jumper and Device Locations ...........................................10
6.1.
Updating the USB-Box ..............................................................................................12
6.2.
GUI Overview ............................................................................................................13
strictly confidential
AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 2/20
1. General Information
1.1. Application
Flash/Torch for mobile phones.
2. Revision Status
Application Note Rev.: AN01
Layout Rev.: 1v21
Schematic Rev.: 1v21
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 3/20
3. Getting Started
3.1. Evaluation Software Installation
Install the AS3630 Evaluation Software, which can be found on the USB-stick from the demokit.
3.2. Connecting the Demoboard
Follow the sequence to connect the AS3630 board (as shown in the picture below):
1. Connect the battery to VBAT and GND
2. Connect the ams AG USB-BOX
3. Turn the board on with the Enable switch
Figure 1:
Hardware setup
Hardware setup of the AS3630 demoboard.
1.
2.
3.
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 4/20
3.3. Starting the Software
The correctly installed demo software can be started from Start > Programs > ams > AS3630 or
from the computer’s desktop.
Figure 2:
Evaluation Software
Start-up window of the evaluation software GUI
Under “Settings” enable “Enable Chip Detection”.
USB connection is immediately indicated in the status bar of the demo software.
Figure 3:
Evaluation Software
USB and demoboard connection indicators
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 5/20
4. Board Startup
• Check first if battery is charged!
• Connect Battery (~3.7V Lithium Ion) to VBAT.
• Connect USB Box.
• Turn on the Enable switch.
• Activate Status Polling
• Press the “Readout Registers”-button
• Press “Settings” an “ Enable Chip Detection”
Figure 4:
Readout Registers Button
• If the AS3630 demoboard is supplied and connected correctly to the USB-Box, the indicators on
the bottom right of the GUI will show the words “USB” and “AS3630 Rev.1” in green.
Figure 5:
Status Bar
4.1. Automatic Readout of Fault Indications
Therefor go to the tab “settings” and activate automatic update. The software is now always
updating the Fault & Status Indications. If an Indication gets highlighted it must be reset
manually.
Figure 6:
Faulst and Status indications
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 6/20
4.2. Indicator Mode\PWM
4.2.1. Application
Most times a red LED is used as Indicator in mobilephones.
In some countries it is a law to warn people before a picture is made or if somebody is using the
automatic release the LED starts blinking faster before it picture is made.
4.2.2. Operation
• Select the checkbox ‘On’ in the ‘Indicator’ settings. The LEDs will smoothy light up and
down.
• The ‘Blink on Time’ and the ‘Blink delay’ can be set.
Figure 7:
Indicator Mode/PWM Checkbox
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 7/20
4.3. Torch Light
4.3.1. Application
It can be used as torch function in an mobilephone or as autofocus infront of a flash
4.3.2. Operation
• Select the desired Current and enable the Torch operation
• Figure 8:
Flash Timings Settings
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 8/20
4.4. Flash Mode
4.4.1. Operation
• Select the desired flash time in the ‘Flash Timings’ settings. If a high current is selected the
flash time has to be limited to 100ms to prevent the LED of thermal damage.
• Enable charge SC. The Supercap will charge to a certain value.
• Figure 9:
Charge SuperCap
Figure 10:
Flash Timings Settings
Disable the checkbox ‘Enable’ in the ‘External Strobe’ settings
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 9/20
• Click on the checkbox ‘Flash Mode’ in the ‘Operation Mode’ settings to trigger a flash.
Figure 11:
Flash Mode Checkbox
• Press the “Strobe” button and the LEDs will flash:
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 10/20
5. Hardware Overview
5.1. AS3630 Demoboard1V2 Jumper and Device Locations
Figure 12:
Jumper Locations
Jumper Function Jumper setting Comment
J1 GND
J2 General purpose
measurement pinhead
J4 VOUT Measurement pinhead
J5 USB Box Interface
Connector I2C-IF
J6 Jumper LED Yes Measurement pinhead
J8 LED Out Measurement pinhead
J10 Indicator / Balance Measurement pinhead
J11 VDCDC Measurement pinhead
J7;J9 LED connection Pin
S1 Strobe switch Optional strobe function
S2 Torch switch Optional torch function
S3 On/off switch
BU1 VBAT
BU2 GND
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 11/20
Figure 13:
Device Specifications
Device Value Comment
C1, C7 47uF Optional
C2 10uF Input capacitor: GRM188R60J106UE82, Murata
C3, C4 10uF Output capacitor: GRM219R61A116U, Murata
L1 1uH Coil DCDC1: LQM32ON1R0MGO
L2 1uH Coil DCDC2: XAL4020-102ME
D1, D2
U1 AS3630 6A SuperCap Flash Driver with Torch and Indicator
Figure 14:
Connector and Jumper Locations
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 12/20
6. GUI – Software
6.1. Updating the USB-Box
• Connect the USB-Box (J5) with the PC and start the AS3630 Demo Software.
• When connecting the USB-Box for the first time, the box has to be updated to the new Version.
• The update can be started by selecting ‘Firmware Upgrade’ from the Help menu.
Figure 15:
USB-Box Firmware Upgrade
• Select the folder ‘USBBox_Firmware and execute the file ‘usbbox.hex’.
Figure 16:
USB-Box Firmware Upgrade – File Destination
Figure 17:
USB-Box Firmware Upgrade – HEX File
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 13/20
6.2. GUI Overview
Write into registers:
Read from registers:
Figure 18:
GUI Description Page 1:
Operation Mode:
See below
SuperCap settings:
• Charge Current from 0V to VIN
Pre-Charge: Charge the SC close to VIN
• Coil1 peak current from VIN towards
= battery current which is taken out of the battery
• End of Charge voltage
Defines the charging- threshold of the Supercap voltage
•
Indicator Settings
• NTC
See below
LED Current settings:
• Set LED current for Flash/Torch
Light
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 14/20
GUI Description Page1 Continued
6.2.1. Operation Mode
• Shutdown:
The AS3630 is in Shutdown mode
• Shutdown + discharge SC:
The AS3630 is in Shutdown mode and the Supercap gets discharged with ~5mA
• Precharge SC:
Charge the SC close to VIN. This mode is used to control the charging current
• Charge SC:
Charge the Supercap to the defined “End OF Charge Voltage” threshold voltage
• Torch operation:
Activates the torch mode
• PWM Op.:
Keep SC with 10mA current during torch mode
• Torch OP. sync to Strobe:
Torch gets only active if the Strobe is on.
• Falsh Op.:
Enables the Flash mode
6.2.2. NTC
The NTC input can be used to monitor the flash LED temperature if the NTC is enabled. A
internal current source controlled by the nTC current sources a current to the NTC. If the
voltage drops below the NTC threshold voltage, the Flash driver stops lightning.
6.2.3. Indicator
• Indicator current:
The current of the indicator could be set from 1-8mA
• Blink on time and Blink delay
The current source is constantly enabled and the rampup/down, normal or smooth, is done by a
PWM modulation. On time and delay of the PWM can be set.
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 15/20
Figure 19:
GUI Description Page1 Continued
6.2.4. Flash Setup
• Skip Enable:
Allow Pulseskip operation for ILED
• Balancer Force on
In external torch mode the balancer could be set to force the balance on even in these
operating modes (e.g. if an external source draws current directly from the Supercap)
• Coil2 Limit Red. LED Current
In this operating mode both peak
current settings together (coil1_peak and coil2_peak) are not
able to deliver the programmed led_current. Therefore both DCDCs are operating in coil current
limit and the LED current is the resulting sum of these two currents. If the register bit
curr_limit_curr_red is set, led_current is ramped down until DCDC2 leaves peak current limit
and operation continuous at mode 2. (DCDC1 and DCDC2 together deliver the flash current)
and led_current_min is set to the reduced LED current.
• Coil2 Peak Current:
Selecting current of DCDC Coil2=
Current out of the SC
• Flash Timer Time:
Set the flash time or limit the
external strobe through this time
• External Strobe Settings:
With an external Strobe it is
defined that the flash gets enabled
over HW
• TXMask Current Reduction
• The coil LDCDC1 current limit
is usually defined by
coil1_peak. If this current is
too high to allow parallel
operation of another high
power load (e.g. the RF power
amplifier) without overloading
of the battery, the TXMask
function can be used to limit
the LED current to a certain
value
.
See below
Fault & Status Indication:
• Indication for all safety und features and
status information
o If an Indication is set, you have to
reset it manually
strictly confidential
AS3630 – AN01 – Demoboard
Preliminary Application Note: 8A Super Cap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 16/20
Figure 20:
GUI Description Page2
•
OTP Memory
• VIN Voltage Detection
Undervoltage threshold during
a flash
• ADC:
10 bit ADC for system
monitoring
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 6A SuperCap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 17/20
7. PCB Layer Stackup
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 6A SuperCap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 18/20
8. AS3630 Demoboard1V2 Schematic
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AS3630 – AN01 – Demoboard
Preliminary Application Note: 6A SuperCap Flash Driver with Torch and Indicator
www.ams.com Revision 1.1 / 2012/07/21
page 19/20
9. Layout (Top View)
10. Layout (Bottom View)
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AMS AS3630 User guide

AMS
Brand
AMS
Model
AS3630
Type
User guide
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