MAX1698, MAX1698A:高效率、升压型稳流器,用于LED驱动

The MAX1698 and MAX1698A are efficient drivers for white or color LEDs. They are ideal for large LED backlit displays in PDAs and laptop computers. Numerous benefits include greater simplicity, lower cost, higher efficiency, longer bulb life, and greater reliability when compared to fluorescent (CCFL) and electroluminescent (EL) lamps. The MAX1698/MAX1698A are switch-mode boost controllers in which LED current, rather than output voltage, is regulated The devices drive series-connected LEDs with a controlled current that is measured with a typically 15Ω sense resistor, not an expensive fractional-ohm value. LED current control and dimming are accomplished with an adjust input (ADJ). For larger light output, multiple LED banks can be connected in parallel with up to 5W total output power. The MAX1698A has a higher, and more accurately specified, CS current limit than the MAX1698 for higherpower applications of 5W or more. Both devices are supplied in a space-saving 10-pin µMAX package that occupies half the space of an 8-pin SO. An evaluation kit (MAX1698EVKIT) is available to speed designs.

关键特性
  • Over 90% Efficiency
  • Lossless, Adjustable LED Brightness
  • Space-Saving 10-Pin µMAX Package
  • Simpler, Lower Cost, More Reliable Compared to CCFL or EL Backlights
  • Up to 5W Output Power
MAX1698、MAX1698A:典型工作电路
MAX1698、MAX1698A:典型工作电路
应用
  • LCD板背光
  • 电池供电背光应用
  • 蜂窝电话
  • 手持终端
  • PDA
数据手册DataSheet
语言下载文件备注
英文MAX1698-MAX1698A.pdfRev 2; 03/2007
关键参数
Part NumberBattery InputRegulation TopologyMax. No. of LEDsLED ChannelsLED ConfigurationILED per Channel
(A)
Dimming RatioDimming ControlVCURR_SENSE
(mV)
POUT
(W)
VIN
(V)
VIN
(V)
ICC
(mA)
LED String Volt.
(V)
Oper. Freq.
(kHz)
Package/PinsBudgetary
Price
maxmaxminmaxmaxmaxSee Notes
MAX16981-Cell Li+Inductor Based504Series-Parallel0.3520Analog30052.75.50.560300µMAX/10$1.40 @1k
开发工具
技术资料
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1698AEUB+生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1698AEUB+T生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1698EUB停止供货MAX1698EUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1698EUB+生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1698EUB+T生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1698EUB-T停止供货MAX1698EUB+TµMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1698-MAX1698A.pdf MAX1698
Protect LED Driver in Backlit Displays MAX9060
Low-Power PWM Output Controls LED Brightness MAX1698
Single FET Controls 2nd LED Array in Switch-Mode LED Backlight MAX1698
Circuit Drives Mixed Types and Quantities of LEDs MAX4040
Feedback Circuit Enhances Efficiency of Boost-Converter Current Source MAX1698
MAX1698.pdf MAX1698
MAX1698-MAX1698A.pdf MAX1698A