回到顶部

高效率、升压型稳流器,用于LED驱动

产品详情

主要特征

应用/用途

Parametric specs for LED Drivers
VIN (V) (min) 2.7
VIN (V) (max) 5.5
Max. No. of LEDs 50
# LED Channels 4
Regulation Topology Inductor Based
Battery Input 1-Cell Li+
LED Configuration Series-Parallel
ILED per Channel (A) (max) 0.35
Dimming Ratio (max) 20
Dimming Control Analog
VCURR_SENSE (mV) 300
POUT (W) 5
ICC (mA) (max) 0.5
LED String Volt. (V) (max) 60
Switching Frequency (kHz) 300
Package/Pins UMAX/10
Budgetary
Price (See Notes)
1.56
查看更多

简化框图

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心

参量

Parametric specs for LED Drivers
VIN (V) (min) 2.7
VIN (V) (max) 5.5
Max. No. of LEDs 50
# LED Channels 4
Regulation Topology Inductor Based
Battery Input 1-Cell Li+
LED Configuration Series-Parallel
ILED per Channel (A) (max) 0.35
Dimming Ratio (max) 20
Dimming Control Analog
VCURR_SENSE (mV) 300
POUT (W) 5
ICC (mA) (max) 0.5
LED String Volt. (V) (max) 60
Switching Frequency (kHz) 300
Package/Pins UMAX/10
Budgetary
Price (See Notes)
1.56

主要特征

  • 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

应用/用途

  • LCD板背光
  • 电池供电背光应用
  • 蜂窝电话
  • 手持终端
  • PDA

描述

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.

简化框图

MAX1698、MAX1698A:典型工作电路 MAX1698、MAX1698A:典型工作电路 Zoom icon

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心