1. Sales Training Presentation
FAN5646: Programmable Indicator “Soft” LED Blinker with TinyWire™ Interface
Sales Training Presentation

2. Introduction
FAN5646 is a programmable indicator LED blinker IC for mobile handsets and consumer devices
Compact and flexible solution that enables designers to program different blink patterns
TinyWire™ digital interface to control and program LED blinking pattern
Small form factor WLCSP and SC70 package formats
Minimizes power consumption to extend battery life
Available in 2 versions:
FAN : Follow-mode version where LED stays on for as long as control pin is high
FAN : LED blinking pattern repeated continuously while control pin is high

3. FAN5646 Programmable Indicator “Soft” LED Blinker
Features
LED soft blink with logarithmic fade up and down
Follow or repeat pattern modes when apps processor powered down
TinyWire™ digital interface to program different lighting patterns
Digital control (single wire)
Compatible with 1.8V logic
High-side current driver
80mV 20mA IOUT (max)
45µA operating quiescent current
Pkg: SC70 & 0.85x0.85mm WLCSP-4
Applications
Mobile Handsets
Bluetooth Headsets
PMP and MP3 Players

4. Minimizes System Power Consumption Flexibility
FAN5646 Key Advantages
Minimizes System Power Consumption
Flexibility
Small Solution Footprint
When visiting customers and introducing them to FAN5646, explain these 3 key advantages/strengths to customer’s engineers to reinforce the value FAN5646 brings to their designs

5. 1. Minimizes System Power
Minimizes overall system power in ultra-portable electronics
FAN5646 blinks programmed pattern of LED autonomously while system processor is in sleep mode
System processors typically consume ~100mA in operation mode
Result = Longer Battery Life
FAN5646
Sleep Mode
One of the biggest strength of using FAN5646 is that it saves the overall system power since it does not require the system processor/CPU to be active to blink the indicator LED in a programmed blinking pattern
As a result this saves current consumption which is extremely valuable in battery-operated ultra-portable electronics since CPUs can consume as much 100mA of current thus prolonging the battery life
When FAN5646 is implemented in a design, the engineer will program a LED blinking pattern into the chip via the TinyWire interface and when it is running it allows the CPU to be in sleep/standby mode thus conserving power
Also if the CPU is running, it allows it to be freed to do other tasks
Customer may also raise an objection by stating that if they use GPIO to blink and drive LED plus save power; they can do the same thing as FAN5646, click on the action button in the upper right hand corner of slide to go to slide to counter this argument

6. 2. Flexibility
Allows design engineer to easily program LED blink pattern
Single-wire digital interface to minimize number of pins
Program up to 2 different pulse widths
Set brightness level of LED
Multiple modes of operation
Idle, Play, Follow, Program and One-Shot
The TinyWire interface is a single-wire digital interface that allows design engineers to easily program the LED blinking pattern
The engineer can set the rise and fall times plus the ON and OFF times for the LED
Additionally the dimming/brightness level of the LED can be programmed too
It also allows the user to program two different pulse widths
There are 4 modes of operation – IDLE, PLAY, FOLLOW and Program plus there is a mode called One-shot
For a a very small device it enable many features in customers’ designs
Mode
LED
Entry
IDLE
OFF
CTRL low for > 200s
PLAY
Play Pattern
CTRL high > 2s
FOLLOW
Follows CTRL
CTRL high < 2s
Program
CTRL high < 50s

7. 3. Small Solution Footprint
Available in low-profile small form factor 4-bump WLCSP
Package Size = 0.85mm x 0.85mm
Combined with very low drop-out voltage, FAN5646 only requires single decoupling capacitor
Total Solution Area = 1.67mm2
FAN5646 has a very low drop-out voltage which enables it to use only a single de-coupling capacitor thus minimizing the overall solution cost
Available in a very small 0.85x0.85mm 4-bump WLCSP form factor, the FAN5646 is one of the smallest LED drivers in the market today
As a result, the overall footprint of the FAN5646 is very small – under 1.67mm2
Therefore not only does the solution occupy a minimal amount of PCB real estate it minimizes the overall cost

8. Not Enough Outputs Lower Efficiency WLCSP Form Factor
FAN5646 Objections
Not Enough Outputs
Lower Efficiency
WLCSP Form Factor
These 3 objections or barriers that may be encountered when visiting customers who balk at using FAN5646 in their design
The following slides provides counter arguments to these objections
One objection that may be raised and sometimes always is, is the cost; I do not have a slide dedicated to it since many customers will bring it up but I do have slides to counter this argument and how customers would implement a low cost solution with the same enhanced features, click on the action button in the time right corner of this slide

9. 1. Not Enough Outputs
FAN5646 designed for applications where only 1 indicator blinking LED is needed
One solution is to use multiple FAN5646 devices to address need for more LED outputs
Currently, FSC has FAN5647 – RGB programmable indicator blinking LED IC in concept stage
Evaluation board with test chip is available for feasibility and demonstration purpose only
Waiting for customer feedback
A common objection may be that the customer will want to use FAN5646 but needs to use 3 to do an RGB indicator light and would balk at using so many in his/her project thus increasing the cost
FAN5646 was originally designed to support 1 indicator LED
One solution is to use multiple FAN5646 and Motorola has decided to do this in some of their new handset platforms – they use 3 FAN5646 in 2 platforms
Also Fairchild has in concept stage FAN5646, a programmable RGB indicator LED driver – we are looking for feedback right now – click on the hyperlink to go to the FAN5646 product page

10. 2. Lower Efficiency
FAN5646 is a very efficient current source LED driver
Very low drop-out voltage of 80mV to ensure enough headroom for LEDs with higher forward voltage
Li-Ion batteries operate most of time between 3.6V to 3.8V
FAN5646 would operate with very little power loss and efficiency would remain high – ratio of output voltage to input voltage
Battery Discharge Curve for
Sanyo’s 600mAh and 750mAh
Li-Ion Batteries
One objection that may or may not occur is low efficiency because FAN5646 is a linear device
It should be important to note that a Li-Ion battery spends most of its time between 3.6V to 3.8V so the argument of the advantage of a charge pump is mute since it would spend most of its time 1x or bypass mode; the charge pump would only be engaged to 1.5x when the battery voltage fell below the forward voltage of the diode
The diagram on this slide shows the battery discharge curve for Sanyo’s 600mAh and 750mAh Li-Ion batteries
FAN5646 has a very low drop-out voltage of 80mV to ensure very long operation when battery voltage begins to fall

11. 2. Lower Efficiency (cont.)
FAN5646 Operating Conditions
Average VBAT = 3.8V
VLED = 3.3V
IOUT = 20mA
Efficiency = (3.3V / 3.8V)
= 87%
An example of FAN5646 efficiency under the conditions stated above
The graph to the right shows the efficiency of FAN5646
Avg. Efficiency
= 85% to 90%

12. 3. WLCSP Some customers may have problems using WLCSP
Either have had no experience or poor assembly yield
Also size may too small for customers to feel comfortable manufacturing with it
FAN5646 is also offered in 5-lead SC70 package
It’s a standard package that has been used for many years
There are still customers who are reluctant to manufacture WLCSP products especially if the form factor and pitch is very small
Often times it is an uphill battle to persuade them to use WLCSP-based products and they have built-in biases
To address this concern, FAN5646 is offered in SC70 package which is a standard JEDEX package that has been used for many years

13. FA5646 Applications Ultra-Portables PC Products Consumer Other
Mobile Handsets
Bluetooth Headsets
MP3 Players
PMP Players
Mobile Internet Devices
PC Products
Notebooks
Routers
PC Cards
DSL/Cable Modems
LCD Monitors
Printers (All-in-One)
Consumer
Electric Shavers
Digital Cameras
Video Camcorders
Copiers / Fax Machines
Set-top Boxes
Electric Toothbrushes
Cordless Phones
Other
Power Tools
Security Cameras
Femtocell BTS

14. Potential FAN5646 Customers
Mobile Handsets
Bluetooth Headsets
MP3/PMP Players
Cameras & Camcorders
PC Products
Printers & Fax Machines
Consumer Products
Nokia
Plantronics
Apple
Sony
Dell HP
Philips
Sony/Ericsson
Jabra
Samsung
Brother
Dewalt
GN Netcom
JVC
Lenovo
Oral B (P&G)
Motorola
iRiver
Olympus
Toshiba
Lexmark
Black & Decker
LG Mobile
Creative Labs
Panasonic
Fujitsu
Canon
Braun
Kodak
Epson
Sanyo
Pantech/Curitel
SEMC
Microsoft
Casio
Huawei
OKI
Remington
Cardo
Nextar
Nikon
Sierra Wireless
Norelco
NEC
Jawbone
SanDisk
Novatel
Makita
Qualcomm
Netgear
Bosch
Broadcom
Cisco/Linksys
Infineon
D-Link
ST/EMP
Belkin

15. Summary
FAN5646 provides value to engineers who implement it in their designs
Saves overall system power
Occupies a very small amount of PCB space
Easy to use and program different patterns
Enhances the end-product’s features without impacting power budget
High value product at cost effective price point

16. Pricing & Availability
Fairchild Part Number
Version
Package
Unit 1ku
Availability
FAN5646UC00X 00
WLCSP-4
$0.51
July 2009
FAN5646S700X
SC70-5
Now
FAN5646UC01X 01
FAN5646S701X

17. Technical Materials FAN5646 Datasheet
FAN5646 Product Overview
Evaluation Boards
Request via KICC or external web
Samples

18. Marketing & Apps Contacts
Marketing Contact
Wayne Seto
Applications Support
Juha Talonen

19. Appendix

20. Low Cost Blinking LED Solution #1
System
Processor
GPIO
Low cost solution is use system processor’s GPIO to blink LED pattern
Limited functionality compared to FAN5646
Output current ~ 2mA
Limited to no dimming capability
Only simple blink patterns can be programmed
Customers may raise an objection in regards to implementing FAN5646 since they have a lower cost version such as using the GPIO of the system processor to drive the blinking LED
They may also say that it does not consume a lot of power since the baseband processor (for handsets) will shut off non-essential parts and let the registers stay on to blink the LED
However this solution does not have the capability of enhancing the end-user experience to do different dimming levels and unique blink patterns and it can only drive up to 2mA of current whereas FAN5646 can go up to 20mA

21. Low Cost Blinking LED Solution #2
System
Processor
GPIO
Regulator
Li-Ion
Battery
Low cost solution is use system processor’s and FET to blink LED pattern
Consumes more power since it requires active use of processor to execute enhanced LED blink pattern
It is lower cost than FAN5646 but does not save overall system power and extend battery life
One objection that may be raised and sometimes always is, is the cost; customers will balk at paying more for a solution that they can implement by connecting a FET to the LED, CPU and battery – they will say the FET only costs me $0.02 but the real cost is that the CPU must contain the blink pattern program and must be active all the time to enable the blinking feature which results in more current being consumed
The question to ask the customer is whether it is acceptable to consume so much power in a battery-operated product to enable this feature – would his/her end-customer be happy with having to re-charge the battery more frequently?
Therefore try to convey that FAN5646 lowers the total cost of ownership which includes the end-customer’s user experience

22. FAN5647 Programmable Indicator “Soft” RGB LED Blinker
Features
4096 RGB color combinations with logarithmic fade up and down
Follow or repeat pattern modes when apps processor powered down
TinyWire™ digital interface to program different lighting patterns
Digital control (single wire)
Compatible with 1.8V logic
High-side current driver
80mV 20mA IOUT (max)
45µA operating quiescent current
Pkg: UMLP-6 & WLCSP-6
Status
Product Definition Stage
Customer Feedback Needed
FAN5647 is in product concept stage and it has not been approved for product development
If there is sufficient interest and Fairchild approves the development of it, it will not take long to produce samples for customers since it is a derivative of FAN5646 and the design blocks are already in place
Questions to ask for customer feedback:
Do you use or plan to use a common anode RGB LED?
Would you connect the input of this chip to the battery? If not then to what regulated supply rail?
What is current solution and why is it not good enough? (if applicable)