L5100_10

L5100_10

  • 厂商:

    UTC(友顺)

  • 封装:

  • 描述:

    L5100_10 - WHITE LED STEP-UP CONVERTER - Unisonic Technologies

  • 详情介绍
  • 数据手册
  • 价格&库存
L5100_10 数据手册
UNISONIC TECHNOLOGIES CO., LTD L5100 WHITE LED STEP-UP CONVERTER DESCRIPTION The UTC L5100 is a STEP-UP DC/DC Converter and designed for driving white LEDs with a constant current. It can drive several LEDs in series by a Li-Ion cell. UTC L5100 switches at a high frequency 1.2MHz, so it can allow the use of tiny external components. The output capacitor can be as small as 0.22μF; saving space and cost compare with alternative other solutions. The low 95mV feedback voltage minimizes power loss in the current setting resistor can have better efficiency. LINEAR INTEGRATED CIRCUIT FEATURES * Inherently Matched LED Current * High Efficiency: 83% Typical * Drives Up to Four LEDs from a 3.2V Supply * Drives Up to Six LEDs from a 5V Supply * 36V Rugged Bipolar Switch * 1.2MHz Switching Frequency * Uses Tiny 1mm Tall Inductors * Output Capacitor can be Small to only 0.22μF ORDERING INFORMATION Ordering Number L5100G-AF5-R Package SOT-25 Packing Tape Reel MARKING www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., LTD 1 of 7 QW-R103-024.C L5100 PIN CONFIGURATION LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION PIN NO. 1 2 3 4 5 PIN NAME SW GND FB SHDN DESCRIPTION Switch. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI. Ground. Connect directly to local ground plane. Feedback. Reference voltage is 95mV. Connect cathode of lowest LED and resistor here. Calculate resistor value according to the formula: RFB = 95mV/ILED Shutdown. Connect to 1.5V or higher to enable device; 0.4V or less to disable device. Input Supply Pin. Must be locally bypassed. VIN UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R103-024.C L5100 BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 7 QW-R103-024.C L5100 ABSOLUTE MAXIMUM RATINGS LINEAR INTEGRATED CIRCUIT PARAMETER SYMBOL RATINGS UNIT Input Voltage VIN 12 V Switch Voltage VSW 36 V Feedback Voltage VFB 12 V V SHDN 12 V Shutdown Voltage Junction Temperature TJ +125 °C Operating Junction Temperature TJ -40~+85 °C Storage Temperature Range TSTG -65~+150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. THERMAL DATA PARAMETER Junction to Ambient (in free air) SYMBOL θJA RATINGS 256 UNIT °C/W ELECTRICAL CHARACTERISTICS (Ta=25°C, VIN=3V, V SHDN =3V, unless otherwise specified.) PARAMETER Operating Voltage Feedback Voltage Shutdown Voltage ON Shutdown Voltage OFF Switch VCESAT Switch Current Limit Supply current Switch Leakage Current Shutdown Pin Bias Current Feedback Pin Bias Current Switching Frequency Maximum Duty Cycle SYMBOL VIN VFB VON VOFF VCESAT(SW) ISW ICC ISW(OFF) ISHDN IFB fOSC DC TEST CONDITIONS ISW=100mA, Duty Cycle=66% MIN 2.5 87 1.5 TYP 95 MAX 12 104 0.3 ISW=250mA SHDN =0V VSW=5V 10 0.8 85 360 320 1.8 0.1 0.01 60 45 1.2 90 2.5 1.0 5 100 1.6 UNIT V mV V V mV mA mA µA µA µA nA MHz % UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R103-024.C L5100 TYPICAL APPLICATION CIRCUITS LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY(%) 5 of 7 QW-R103-024.C L5100 TYPICAL APPLICATION CIRCUITS (Cont.) LINEAR INTEGRATED CIRCUIT EFFICIENCY(%) Seven LED Efficiency 85 V IN 5V L=22μH C IN 1µF V IN SW D VDC DIMMING C OUT 0. 22µF 80 90k SHDN GND FB 5k R1 4Ω 75 70 5 V to Seven White LEDs 65 0 1 0 LOAD CURRENT (mA) 5 1 5 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 7 QW-R103-024.C L5100 TYPICAL CHARACTERISTICS Quiescent Current 2 .2 2 .0 1 .8 1 .6 1 .4 IQ (mA) 1 .2 1 .0 0 .8 0 .6 0 .4 0 .2 0 0 0 2 4 V IN (V ) 6 8 10 0 350 LINEAR INTEGRATED CIRCUIT Current Limit vs Duty Cycle 25 80 CURRENT LIMIT (mA) 300 250 200 150 100 50 20 40 60 80 100 DUTY CYCLE (%) * UTC L5100 is guaranteed the operating temperature range of 0°C ~ 75°C. UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 7 QW-R103-024.C
L5100_10
物料型号: - L5100G-AF5-R - 封装类型:SOT-25 - 包装类型:Tape Reel(胶带卷装)

器件简介: UTC L5100是一款升压型DC/DC转换器,专为驱动白光LED恒流而设计。它可以使用锂离子电池驱动多个串联LED。UTC L5100在1.2MHz的高频率下工作,因此可以使用非常小的外部组件。输出电容可以小至0.22μF,节省空间和成本。

引脚分配: - 1号引脚:SW(开关),连接电感器/二极管,应尽量减少该引脚的走线区域以降低EMI。 - 2号引脚:GND(地),直接连接到当地的接地平面。 - 3号引脚:FB(反馈),参考电压为95mV,连接最低LED的阴极和电阻。 - 4号引脚:SHDN(关闭),连接到1.5V或更高以启用设备;0.4V或更低以禁用设备。 - 5号引脚:VIN(输入供电引脚),必须局部旁路。

参数特性: - 输入电压:12V - 开关电压:36V - 反馈电压:12V - 关闭电压:12V - 结温:+125°C - 工作结温:-40~+85°C - 存储温度范围:-65~+150°C - 从结到环境(自由空气)的热阻:256°C/W

功能详解: UTC L5100具有以下特性: - 固有匹配LED电流 - 高效率:典型值为83% - 可从5V电源驱动多达六个LED - 可从3.2V电源驱动多达四个LED - 36V强化双极开关 - 1.2MHz开关频率 - 使用高度仅为1mm的小型电感器 - 输出电容可以小至0.22μF

应用信息: UTC L5100保证的工作温度范围为0°C ~ 75°C。UTC不承担因使用超出产品规格中列出的最大额定值(例如最大额定值、工作条件范围或其他参数)而导致的设备故障责任。UTC产品未设计用于生命维持器具、设备或系统,其中这些产品的故障可合理预期会导致人身伤害。

封装信息: - 封装类型:SOT-25 - 包装类型:Tape Reel(胶带卷装)
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