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April 2010
FAN5340
Synchronous Constant-Current Series Boost LED Driver
with PWM Brightness Control and Integrated Load
Disconnect
Features
Synchronous Current-Mode Boost Converter
Up to 500mW Output Power
Supports 2, 3, or 4 LEDs in Series
2.7V to 4.8V Input Voltage Range
1.2MHz Fixed Switching Frequency
1mA Maximum Quiescent Current
Soft-Start Capability
Input Under-Voltage Lockout (UVLO)
Output Over-Voltage Protection (OVP)
Short-Circuit Detection
Thermal Shutdown (TSD) Protection
8-Lead 3.00 x 3.00mm MLP
Description
The FAN5340 is a synchronous constant-current LED driver
capable of efficiently delivering up to 500mW to a string of up
to four LEDs in series. Optimized for small form-factor
applications, the 1.2MHz fixed switching frequency allows
the use of chip inductors and capacitors.
For safety, the device features integrated short-circuit
detection plus over-voltage and thermal shutdown
protections. In addition, input under-voltage lockout
protection is triggered if the battery voltage is low.
Brightness (dimming) control is implemented by applying a
PWM signal of 300Hz to 1kHz on the EN pin. During
shutdown, the FAN5340 disconnects the LED anodes from
the output of the boost regulator, which holds the boost
regulator’s voltage on C OUT , reducing audible noise from the
PWM dimming and removing power from the LED string.
8-Bump 1.57 x 1.57mm WLCSP
Applications
2–4
LEDs
GND
EN
VLED
1
2
3
P1
GND
8
7
6
VIN
VOUT C OUT
SW
C IN
Cellular Phones, Smart Phones
FB
4
5
PGND
Pocket PCs
WLAN DC-DC Converter Modules
RSET
PDA, DSC, PMP, and MP3 Players
Ordering Information
Figure 1.
Typical Application
Part Number
FAN5340UCX
FAN5340MPX
(Prelminary)
Operating
Temperature Range
-40 to 85°C
-40 to 85°C
Package
8-Bump, 1.57 x 1.57mm Wafer Level Chip-Scale
Package (WLCSP)
8-Lead, 3.00 x 3.00mm Molded Leadless
Package (MLP)
Packing
Tape and Reel
Tape and Reel
? 2010 Fairchild Semiconductor Corporation
FAN5340 ? Rev. 1.0.1
www.fairchildsemi.com
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相关代理商/技术参数
FAN5340UCX 功能描述:LED照明驱动器 Sync Constant Crnt Series Boost LEDDrvr RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
FAN5341 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Series Boost LED Driver with Integrated Schottky Diode and Single-Wire Digital Interface
FAN53418 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Synchronous DC-DC MOSFET Driver
FAN53418 WAF 制造商:Fairchild Semiconductor Corporation 功能描述:
FAN53418M 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Synchronous DC-DC MOSFET Driver
FAN53418MX 功能描述:功率驱动器IC DC-DC MOSFET Driver Synchronous RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube
FAN5341AUMPX 制造商:Fairchild Semiconductor Corporation 功能描述:
FAN5341UMPX 功能描述:功率驱动器IC Asynchronous Series Boost LED Driver RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube