FAN5645MPX

FAN5645MPX Datasheet

FAN5645 Indicator LED Blinker with Single-Wire Interface

Part	Datasheet
FAN5645MPX	FAN5645MPX (pdf)

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FAN5645 Indicator LED Blinker with Single-Wire Interface September 2007 FAN5645 Indicator LED Blinker with Single-Wire Interface Records and plays back blink patterns Single-wire digital control of LED blink rate and intensity Resistor-programmable LED maximum current High-side constant-current driver topology: - 20mA maximum output - 40mV typical dropout at 20mA 33µA operating current Standard 1.8V logic Short-circuit protection Thermal Shutdown Protection Under-Voltage Lockout Protection 6-pin x 3.0mm MLP package Cell Phones, Smart-Phones Pocket PCs, Headsets PDA, DSC, PMP, and MP3 Players Laptop Computers The FAN5645 is a flexible and compact solution for a blinking LED indicator. The internal programmable blink algorithm eliminates any need for continual system processor control. This means longer battery life for the hand-held system because the system processor is not awakened from sleep mode just to blink an LED. Very low dropout of 40mV allows driving an LED without any inductors or switch capacitors. An external resistor sets the LED output current level. LED blink rate and intensity is controlled by a simple one-wire interface. In shutdown mode, the supply current is reduced to 0.3µA typical . The FAN5645 is available in 6-pin molded leadless package MLP . to 5.5V VBAT CIN 0.1µF Control VIN GND CTRL LED+ ISET GND RSET Figure Typical Application for the FAN5645 Ordering Information Package FAN5645MPX MLP-6 x 3.0mm is a registered trademark of Motorola, Inc. Pb-Free Operating Temperature Range Packing Method -40°C to 85°C Tape and Reel FAN5645 Indicator LED Blinker with Single-Wire Interface Block Diagram Under-Voltage UVLO Lockout Thermal Shutdown TSD Protection CTRL VIN GND Input edge detector & timer Bandgap reference Oscillator DATA Ref. current generator Control logic & memory Output current mirror LED+ RSET ISET Pin Configuration Figure Block Diagram GND 1 6 VIN LED+ 2 P1 GND 5 GND ISET 3 4 CTRL Top View Figure MLP Pin Assignments Pin Definitions Pin # 1 2 3 4 5 6 Name GND LED+ ISET CTRL GND VIN Description Ground. 0V reference for all voltages. LED output. Connect to anode of LED. Current Set. Resistor to GND sets maximum LED current Digital single wire interface. Program STOP/TRAIN/RUN sequences. Ground. 0V reference for all voltages. Power input. 2006 Fairchild Semiconductor Corporation FAN5645 Indicator LED Blinker with Single-Wire Interface

PDF Datasheet Preview

FAN5645 Indicator LED Blinker with Single-Wire Interface

September 2007

FAN5645 Indicator LED Blinker with Single-Wire Interface

Records and plays back blink patterns Single-wire digital control of LED blink rate and intensity Resistor-programmable LED maximum current High-side constant-current driver topology:
- 20mA maximum output - 40mV typical dropout at 20mA 33µA operating current Standard 1.8V logic Short-circuit protection Thermal Shutdown Protection Under-Voltage Lockout Protection 6-pin x 3.0mm MLP package

Cell Phones, Smart-Phones Pocket PCs, Headsets PDA, DSC, PMP, and MP3 Players Laptop Computers

The FAN5645 is a flexible and compact solution for a blinking LED indicator. The internal programmable blink algorithm eliminates any need for continual system processor control. This means longer battery life for the hand-held system because the system processor is not awakened from sleep mode just to blink an LED.

Very low dropout of 40mV allows driving an LED without any inductors or switch capacitors.

An external resistor sets the LED output current level. LED blink rate and intensity is controlled by a simple one-wire interface. In shutdown mode, the supply current is reduced to 0.3µA typical .

The FAN5645 is available in 6-pin molded leadless package MLP .
to 5.5V VBAT

CIN 0.1µF

Control

VIN GND CTRL

LED+ ISET GND

RSET

Figure Typical Application for the FAN5645
Ordering Information

Package

FAN5645MPX MLP-6 x 3.0mm
is a registered trademark of Motorola, Inc.

Pb-Free Operating Temperature Range Packing Method
-40°C to 85°C

Tape and Reel

FAN5645 Indicator LED Blinker with Single-Wire Interface

Block Diagram

Under-Voltage UVLO Lockout

Thermal Shutdown TSD Protection

CTRL

VIN GND

Input edge detector & timer

Bandgap reference

Oscillator

DATA

Ref. current generator

Control logic
& memory

Output current mirror

LED+

RSET

ISET

Pin Configuration

Figure Block Diagram

GND 1
6 VIN

LED+ 2

P1 GND
5 GND

ISET 3
4 CTRL

Top View

Figure MLP Pin Assignments

Pin Definitions

Pin # 1 2 3 4 5 6

Name GND LED+ ISET CTRL GND VIN

Description Ground. 0V reference for all voltages. LED output. Connect to anode of LED. Current Set. Resistor to GND sets maximum LED current Digital single wire interface. Program STOP/TRAIN/RUN sequences. Ground. 0V reference for all voltages. Power input.
2006 Fairchild Semiconductor Corporation

FAN5645 Indicator LED Blinker with Single-Wire Interface

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Datasheet ID: FAN5645MPX 513950