MAX1848

白光LED升压型转换器,SOT23封装

电流调节升压转换器,用于白光LED供电,可保持一致亮度


点击查看特定型号的库存状况。

说明

The MAX1848 drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. The step-up converter topology allows series connection of the white LEDs so that the LED currents are identical for uniform brightness. This configuration eliminates the need for ballast resistors and expensive factory calibration. Other benefits include greater simplicity, lower cost, higher efficiency, and greater reliability.

This step-up PWM converter includes an internal, high-voltage, low RDSON N-channel MOSFET switch for high efficiency and maximum battery life. A single analog voltage Dual Mode™ input provides a simple means of brightness adjustment and on/off control. Fast 1.2MHz current-mode PWM control allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Programmable soft-start eliminates inrush current during startup.

The MAX1848 is available in space-saving 8-pin thin QFN (3mm x 3mm) and 8-pin SOT23 packages.
MAX1848:典型应用电路 MAX1848:典型应用电路 放大+

关键特性

  • Constant Current Regulation for Uniform Illumination
  • High 87% Efficiency
  • Analog or Logic Control of LED Intensity
  • 0.8W Output Power with Internal High-Voltage MOSFET Switch
  • Small, Low-Profile External Components
  • 2.6V to 5.5V Input Range
  • 13V Maximum Output with Overvoltage Protection
  • Optimized for Low Input Ripple
  • Programmable Soft-Start
  • 0.3µA Shutdown Current
  • Small 8-pin Thin QFN (3mm x 3mm) and 8-Pin SOT23 Packages

应用

  • 蜂窝电话/智能电话
  • 电子书与亚笔记本电脑
  • PDA、掌上电脑与无线手持装置
  • 白色LED显示器背光
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
MAX1848 1-Cell Li+Inductor Based61Series0.0620Analog750.82.65.52121200
SOT23/8
TDFN/8
$1.39 @1k
查看所有LED Drivers (80)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX1848EVKIT: MAX1848评估板
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

质量管理体系 >
环境管理体系 >

 
Status:
Package:
Temperature:

相关资料


MAX25024
Automotive Low Input Voltage I2C 4-Channel 150mA Backlight Driver Supporting ASIL B

  • Wide Voltage-Range Operation
  • High Integration
  • Robust and Low EMI

MAX25613
Automotive Infrared LED Controller

  • High-Current LED Driver with Reduced di/dt on the Battery Harness
  • Protection Features Increase System Reliability
  • Automotive Ready

MAX25601A
Synchronous Boost and Synchronous Buck LED Controllers

  • Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Cost
  • Wide Dimming Ratio Allows High Contrast Ratio
  • Protection Features and Wide Temperature Range Increase System Reliability

MAX25601B
Synchronous Boost and Synchronous Buck LED Controllers

  • Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Cost
  • Wide Dimming Ratio Allows High Contrast Ratio
  • Protection Features and Wide Temperature Range Increase System Reliability

MAX25601C
Synchronous Boost and Synchronous Buck LED Controllers

  • Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Cost
  • Wide Dimming Ratio Allows High Contrast Ratio
  • Protection Features and Wide Temperature Range Increase System Reliability

MAX25601D
Synchronous Boost and Synchronous Buck LED Controllers

  • Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Cost
  • Wide Dimming Ratio Allows High Contrast Ratio
  • Protection Features and Wide Temperature Range Increase System Reliability

MAX20056B
Integrated, 6-Channel High-Brightness LED Driver with Very Wide PWM Dimming Ratio and Phase Shifting for Automotive Displays

  • Robust with Respect to EMC and Automotive Battery Transients
  • Spread-Spectrum Mode Reduces Emission at the Switching Frequency and its Harmonics
  • Phase-Shift Dimming of LED Strings

MAX25612
汽车应用同步、高压LED控制器

  • 高度集成最大程度降低BOM和成本
  • 优化效率、电路板空间和输入工作范围
  • 保护特性提高系统可靠性