FAN5646 Fairchild Semiconductor, FAN5646 Datasheet

FAN5646

Manufacturer Part Number

FAN5646

Description

LED Blinker

Manufacturer

Fairchild Semiconductor

Datasheet

1.FAN5646.pdf (2 pages)

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FAN5646 • Rev. 1.0.1

FAN5646

Programmable Indicator “Soft” LED Blinker with TinyWire™

Single-Wire Interface

Features

Applications

Ordering Information

Bluetooth® is a registered trademark of Bluetooth SIG, Inc.

Important: Contact a Fairchild Semiconductor sales representative for additional performance information and specifications.

FAN5646UC00X

FAN5646UC01X

FAN5646S700X

FAN5646S701X

Part Number

For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.

LED “Soft” Blink: with Logarithmic Fade Up and Fade

Down for Power Savings

Follow or Repeat Pattern Mode for Blinking when

Applications Processor is Powered Down

Default Pattern Optionally Modified using TinyWire™

Single-Wire Digital Control for:

–

High-Side Constant Current LED Driver:

–

35μA Operating Quiescent Current

Short-Circuit, Under-Voltage, and Thermal Protections

Wide Input Range: 2.7 to 5.5V

4-Bump WLCSP, 0.4mm pitch or

5-Lead SC70 (EIAJ SC88)

Cell Phone

Pocket PCs and Digital Cameras

Bluetooth

LED Current Rise / Fall Time

20mA Maximum Output Current

80mV Drop-out at 20mA I

External R

Programming

and t

Headsets PMP and MP3 players

OFF

SET

Option

for Up to Two Pulses

(SC70 only) or Internal Current

Follow Bit

Default

OUT

Temperature

-40 to 85°C

Range

Description

The FAN5646 is a flexible and compact solution for a blinking

or “breathing” LED indicator. The internal programmable blink

algorithm eliminates any need for continual system processor

control. This means longer battery life for a hand-held system

because the system processor is not awakened from sleep

mode to blink an LED.

Very low dropout of 80mV allows driving an LED without any

inductors or switch capacitors. LED blink rate, rise and fall

time, and CTRL line behavior can be programmed by a

TinyWire™ single-wire digital interface. The on-time and time

between pulses can be set for up to two different pulse widths.

The default for FAN5646 option 01 is “follow” mode, where the

LED turns on with the programmed rise time, then stays on as

long as CTRL remains HIGH. When CTRL falls, the LED turns

off at the programmed fall time. For option 00; when CTRL is

HIGH continuously, the LED repeats the programmed pattern.

The FAN5646 is available in a four-pin wafer-level chip-scale

package with 0.4mm pitch or a five-lead SC70 package.

Eco Status

Green

Figure 1. Typical Application

WLCSP-4, 0.4mm Pitch

5-Lead SC70, EIAJ SC88

WLCSP-4, 0.4mm Pitch

5-Lead SC70, EIAJ SC88

Package

www.fairchildsemi.com

Tape and Reel

August 2009

Packing

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