LED Driver. FAN5341 Datasheet

FAN5341 Driver. Datasheet pdf. Equivalent

FAN5341 Datasheet
Recommendation FAN5341 Datasheet
Part FAN5341
Description Series Boost LED Driver
Feature FAN5341; FAN5341 — Series Boost LED Driver with Integrated Schottky Diode and Single-Wire Digital Interface .
Manufacture ON Semiconductor
Datasheet
Download FAN5341 Datasheet





ON Semiconductor 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



ON Semiconductor 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
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ON Semiconductor FAN5341
Pin Configuration
VOUT 1
VIN 2
EN 3
P1
GND
6 GND
5 SW
4 FB
Figure 3. UMLP6 Package, ^Top View
Pin Definitions
Pin #
1
2
3
4
5
6
Name
VOUT
VIN
EN
FB
SW
GND
Description
Boost Output Voltage . Output of the boost regulator. Connect the LEDs to this pin. Connect COUT
(Output Capacitor) to GND.
Input Voltage. Connect to pow er source and decouple w ith CIN to GND.
Enable Brightness Control. Program dimming levels by driving pin w ith digital pulses.
Voltage Feedback. The boost regulator regulates this pin to 0.253V to control the LED string current.
Tie this pin to a current setting resistor (RSET) betw een GND and the cathode of the LED string.
Sw itching node . Tie inductor L1 from VIN to SW pin.
Ground. Tie directly to a GND plane.
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