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LM2759

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具有 I2C 兼容接口、1A 开关电容器 LED 闪光灯驱动器

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LM2759

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数据表 立即订购

产品详情

Input voltage type DC/DC Topology Charge pump, current mode Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 3 Iout (max) (A) 1 Iq (typ) (mA) 3.4 Features I2C control Operating temperature range (°C) -30 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
Input voltage type DC/DC Topology Charge pump, current mode Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 3 Iout (max) (A) 1 Iq (typ) (mA) 3.4 Features I2C control Operating temperature range (°C) -30 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
WSON (DQB) 12 9 mm² 3 x 3
  • Up to 1A Output Current
  • Solution Area < 22 mm2
  • No Inductor Required
  • 90% Peak Efficiency
  • Adaptive 1x, 1.5x and 2x Gains for Maximum Efficiency
  • Load Disconnect in Shutdown
  • Accurate Input Current Control During Gain Transitions
  • Flash Time-Out
  • TX Input Pin Ensures Synchronization with RF Power Amplifier Pulse
  • Torch, Flash, and Indicator Modes
  • External Flash Enable via Strobe Input Pin
  • Strobe Input Disable via I2C
  • Programmable Flash Pulse Duration, and Torch and Flash Currents via I2C-Compatible Interface
  • 1MHz Constant Frequency Operation
  • Low Profile 12–Pin WSON (3mm x 3mm x 0.8mm)

All trademarks are the property of their respective owners.

  • Up to 1A Output Current
  • Solution Area < 22 mm2
  • No Inductor Required
  • 90% Peak Efficiency
  • Adaptive 1x, 1.5x and 2x Gains for Maximum Efficiency
  • Load Disconnect in Shutdown
  • Accurate Input Current Control During Gain Transitions
  • Flash Time-Out
  • TX Input Pin Ensures Synchronization with RF Power Amplifier Pulse
  • Torch, Flash, and Indicator Modes
  • External Flash Enable via Strobe Input Pin
  • Strobe Input Disable via I2C
  • Programmable Flash Pulse Duration, and Torch and Flash Currents via I2C-Compatible Interface
  • 1MHz Constant Frequency Operation
  • Low Profile 12–Pin WSON (3mm x 3mm x 0.8mm)

All trademarks are the property of their respective owners.

LM2759 is an integrated low-noise, high-current switched capacitor DC/DC converter with a regulated current source. The device requires only four small ceramic capacitors making the total solution area less than 22 mm2 and the height less than 1 mm. The LM2759 is capable of driving loads up to 1A from a single-cell Li-Ion battery. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements.

The LED current can be programmed up to 1A via an I2C-compatible interface, along with eight selectable Flash Time-Out durations. One high-current Flash LED can be driven either in a high-power Flash mode or a low-power Torch mode. The Strobe pin allows the flash to be toggled via a Flash enable signal from a camera module. The TX input pin limits the Flash LED current to the Torch current level during a RF PA pulse, to reduce high loads on the battery. Internal soft-start circuitry limits the amount of inrush current during start-up.

LM2759 is offered in a small 12-pin thermally enhanced WSON package.

LM2759 is an integrated low-noise, high-current switched capacitor DC/DC converter with a regulated current source. The device requires only four small ceramic capacitors making the total solution area less than 22 mm2 and the height less than 1 mm. The LM2759 is capable of driving loads up to 1A from a single-cell Li-Ion battery. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements.

The LED current can be programmed up to 1A via an I2C-compatible interface, along with eight selectable Flash Time-Out durations. One high-current Flash LED can be driven either in a high-power Flash mode or a low-power Torch mode. The Strobe pin allows the flash to be toggled via a Flash enable signal from a camera module. The TX input pin limits the Flash LED current to the Torch current level during a RF PA pulse, to reduce high loads on the battery. Internal soft-start circuitry limits the amount of inrush current during start-up.

LM2759 is offered in a small 12-pin thermally enhanced WSON package.

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* 数据表 LM2759 1A Switched Capacitor Flash LED Driver with I 2 C Compatible Interface 数据表 (Rev. D) 2013年 5月 3日
白皮书 常见 LED 功能和 LED 驱动器设计注意事项 英语版 2020年 9月 21日

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