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FAN5645 Dataheets PDF



Part Number FAN5645
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description Indicator LED Blinker
Datasheet FAN5645 DatasheetFAN5645 Datasheet (PDF)

FAN5645 — Indicator LED Blinker with Single-Wire Interface September 2007 www.datasheet4u.com FAN5645 Indicator LED Blinker with Single-Wire Interface Features ƒ Records and plays back blink patterns ƒ Single-wire digital control of LED blink rate and intensity ƒ Resistor-programmable LED maximum current ƒ High-side constant-current driver topology: - 20mA maximum output - 40mV typical dropout at 20mA ƒ 33µA operating current ƒ Standard 1.8V logic ƒ Short-circuit protection ƒ Thermal Shutdown.

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FAN5645 — Indicator LED Blinker with Single-Wire Interface September 2007 www.datasheet4u.com FAN5645 Indicator LED Blinker with Single-Wire Interface Features ƒ Records and plays back blink patterns ƒ Single-wire digital control of LED blink rate and intensity ƒ Resistor-programmable LED maximum current ƒ High-side constant-current driver topology: - 20mA maximum output - 40mV typical dropout at 20mA ƒ 33µA operating current ƒ Standard 1.8V logic ƒ Short-circuit protection ƒ Thermal Shutdown Protection ƒ Under-Voltage Lockout Protection ƒ 6-pin 3.0 x 3.0mm MLP package Applications ƒ ƒ ƒ ƒ Cell Phones, Smart-Phones Pocket PCs, Bluetooth Headsets PDA, DSC, PMP, and MP3 Players Laptop Computers ® Description 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). Typical Application 2.7 to 5.5V VBAT C IN 0.1µF VIN GND CTRL LED+ ISET GND R SET Control Figure 1. Typical Application for the FAN5645 Ordering Information Part Number FAN5645MPX Package MLP-6 3.0 x 3.0mm Pb-Free Operating Temperature Range Packing Method -40°C to 85°C Tape and Reel Bluetooth® is a registered trademark of Motorola, Inc. © 2006 Fairchild Semiconductor Corporation FAN5645 • Rev. 1.0.0 www.fairchildsemi.com FAN5645 — Indicator LED Blinker with Single-Wire Interface Block Diagram Under-Voltage UVLO Lockout Thermal Shutdown Protection TSD www.datasheet4u.com CTRL Input edge detector & timer Oscillator DATA Control logic & memory LED ON Bandgap reference Ref. current generator Output current mirror LED+ VIN GND ISET RSET Figure 2. Block Diagram Pin Configuration GND LED+ 1 6 VIN GND 2 P1 (GND) 5 ISET 3 4 CTRL Top View Figure 3. 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 1:400. Digital single wire interface. Program STOP/TRAIN/RUN sequences. Ground. 0V reference for all voltages. Power input. www.fairchildsemi.com 2 © 2006 Fairchild Semiconductor Corporation FAN5645 • Rev. 1.0.0 FAN5645 — Indicator LED Blinker with Single-Wire Interface Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. www.datasheet4u.com Symbol ISET Voltage TJ TSTG TL ESD Junction Temperature Storage Temperature Parameter VIN, LED+, CTRL Voltage Min. -0.3 -0.3 -40 -65 HBM 7 2 8 Max. +6.0 VIN+0.2 150 150 260 Unit V V °C °C °C kV Lead Soldering Temperature, 10 seconds Electrostatic Discharge Protection Level CDM HBM (on LED+ pin) Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to absolute maximum ratings. Symbol VIN IOUT RSET TA TJ Output Current Parameter Power Supply Voltage Range Resistor Used to Set LED Current Operating Ambient Temperature Range Operating Junction Temperature Range Min. 2.7 1 24.7 -40 -40 Max. 5.5 20 494.0 +85 +125 Units V mA kΩ °C °C © 2006 Fairchild Semiconductor Corporation FAN5645 • Rev. 1.0.0 www.fairchildsemi.com 3 FAN5645 — Indicator LED Blinker with Single-Wire Interface Electrical Specifications VIN = 2.7V to 5.5V, TA = -40°C to +85°C, Vf = 1.8V to (3.5V or VIN-0.1V, whichever is smaller). Typical values are at TA = 25°C, VIN = 3.6V, and Vf = 2.5V. Symbol Parameter Conditions VIN = 3.6V VIN = 3.6V, ILED = 0mA Min. Typ. 0.30 33 Max. 0.75 55 Units µA µA V Power Supplies Shutdown current in STOP www.datasheet4u.com ISD (sleep) mode IIN VIH VIL IIH VUVLO Regulation IOUT Maximum regulated output current Minimum regulated output current Maximum LED ripple current ISET accuracy IOUT load regulation IOUT line regulation ISET voltage ISET current limit Current mirror ratio VDROPOUT ISC TSD Timing fOSC TOSC tON tOFF Internal oscillator frequency Oscillator stability LED on-time resolution LED off-time res.


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