FAN5341 Driver Datasheet

FAN5341 Datasheet, PDF, Equivalent


Part Number

FAN5341

Description

Series Boost LED Driver

Manufacture

ON Semiconductor

Total Page 11 Pages
Datasheet
Download FAN5341 Datasheet


FAN5341
FAN5341
Series Boost LED Driver with Integrated Schottky Diode and
Single-Wire Digital Interface
Features
Asynchronous Boost Converter
Internal Schottky Diode
Up to 500mW Output Pow er
Drives 3 to 5 LEDs in Series
2.7V to 5.5V Input Voltage Range
Single-Wire Digital Control Interface to Set LED
Brightness Levels
32 Linear Steps
1.2MHz Fixed Sw itching Frequency
Soft-Start Capability
Input Under-Voltage Lockout (UVLO)
Output Over-Voltage Protection (OVP)
Short-Circuit Detection
Thermal Shutdow n (TSD) Protection
Low Profile 6-lead 2.0 x 2.0 x 0.55mm UMLP Package
Applications
Cellular Mobile Handsets
Mobile Internet Devices
Portable Media Players
PDA, DSC, MP3 Players
Description
The FAN5341 is an asynchronous constant-current LED
driver capable of efficiently delivering up to 500mW to a
string of up to five LEDs in series. Optimized for small form-
factor applications, the 1.2MHz fixed sw itching frequency
allow s the use of small chip inductors and capacitors.
The FAN5341 uses a simple single-w ire digital control
interface to program the brightness levels of the LEDs in 32
linear steps by applying digital pulses.
For safety, the device features integrated over-voltage, over-
current, short-circuit detection, and thermal-shutdow n
protection. In addition, input under-voltage lockout protection
is triggered if the battery voltage is too low .
The FAN5341 is available in a very low profile, small form-
factor 2mm x 2mm x 0.55mm 6-lead UMLP package that is
green and RoHS compliant.
Ordering Information
Part Number
FAN5341UMPX
Temperature Range
-40 to 85°C
Package
6-lead, 2.0 x 2.0mm UMLP
Packing
Tape and Reel
© 2009 Semiconductor Component Industries, LLC.
October-2017, Rev .2
Publication Order Number:
FAN5341/D

FAN5341
Typical Application Diagram
L = 10µH
L1
2.7V to 5.5V
CIN = 10µF
VIN
2
GND
6
EN
3
FAN5341
5 SW
VOUT
1
FB
4
COUT = 1µF
3 5 LEDs
Block Diagram
Figure 1. Typical Application
RSET = 12.7@ ILED =20mA
RSET = 10.0@ ILED =25mA
VIN 2
GATE
DRIVE
GND 6
EN 3
BOOST OVP/
CONTROL SCD
Digital I/F
5 SW
D1
1 VOUT
4 FB
Figure 2. Functional Block Diagram
www.onsemi.com
2


Features FAN5341 — Series Boost LED Driver with Integrated Schottky Diode and Single-W ire Digital Interface FAN5341 Series B oost LED Driver with Integrated Schottk y Diode and Single-Wire Digital Interfa ce Features  Asynchronous Boost Con verter  Internal Schottky Diode  Up to 500mW Output Pow er  Drives 3 to 5 LEDs in Series  2.7V to 5.5V In put Voltage Range  Single-Wire Digit al Control Interface to Set LED Brightn ess Levels  32 Linear Steps  1.2M Hz Fixed Sw itching Frequency  Soft- Start Capability  Input Under-Voltag e Lockout (UVLO)  Output Over-Voltag e Protection (OVP)  Short-Circuit De tection  Thermal Shutdow n (TSD) Pro tection  Low Profile 6-lead 2.0 x 2. 0 x 0.55mm UMLP Package Applications Cellular Mobile Handsets  Mobile I nternet Devices  Portable Media Play ers  PDA, DSC, MP3 Players Descript ion The FAN5341 is an asynchronous cons tant-current LED driver capable of effi ciently delivering up to 500mW to a string of up to five LEDs in series. Optimized for small formfact.
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