MAX1912

1.5倍/2倍、高效率、白光LED驱动电荷泵


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说明

MAX1910/MAX1912能够从未经稳压的输入电源(2.7V至5.3V)为LED提供稳定的电压或电流输出(最大120mA)。这两个器件是功能完备的DC-DC转换器,仅需要4个小尺寸的陶瓷电容,无需电感。利用独特的稳压技术可以在宽负载范围下保持750kHz的固定开关频率,降低输入纹波。MAX1910/MAX1912还具有逻辑电平关断、软启动功能,降低启动过程中的输入浪涌电流。

MAX1910可自动选择两种工作模式:1.5倍和2倍。1.5倍模式能够在高输入电压下提高效率,而2倍模式保证在低输入电压下保持稳压输出。MAX1912只能工作在1.5倍模式。

MAX1910和MAX1912均采用节省空间的、10引脚µMAX封装。
MAX1910、MAX1912:典型工作电路 MAX1910、MAX1912:典型工作电路 放大+

关键特性

  • 高效率1.5倍/2倍电荷泵
  • 低输入纹波、750kHz工作频率
  • 200mV检流门限减小损耗
  • 稳流或稳压电荷泵
  • 最大120mA输出电流
  • 无需电感
  • 小尺寸的陶瓷电容
  • ±5%稳定的LED电流
  • 关断模式下负载完全断开
  • 1µA关断电流
  • 小尺寸、10引脚µMAX封装

应用

  • 备用电池升压转换器
  • 蜂窝电话
  • 数码相机
  • MP3播放器
  • PDA
  • 白色LED背光

请查看具体的参数规格 LED Drivers (81)


Part NumberBattery InputRegulation TopologyMax. No. of LEDsLED ChannelsLED ConfigurationILED per Channel
(A)
Dimming ControlPOUT
(W)
VIN
(V)
VIN
(V)
ICC
(mA)
LED String Volt.
(V)
Oper. Freq.
(kHz)
Package/PinsBudgetary
Price
maxminmaxmaxmaxSee Notes
MAX1910 1-Cell Li+Charge Pump51Parallel0.12Analog0.52.75.32.55750
UMAX/10
$1.16 @1k
MAX1912 4
UMAX/10
$1.29 @1k

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。

MAX1910EVKIT: MAX1910、MAX1912评估板
申请可靠性报告: MAX1912 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

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。

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