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LM2754

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具有超时保护功能的 800mA 开关电容器 LED 闪光灯驱动器

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LM2754

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产品详情

Input voltage type DC/DC Topology Charge pump, current mode Vin (min) (V) 2.8 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 3 Iout (max) (A) 0.8 Iq (typ) (mA) 3.4 Features Enable, True Shutdown Operating temperature range (°C) -40 to 85 Dimming method Analog, PWM Number of channels 4 Rating Catalog
Input voltage type DC/DC Topology Charge pump, current mode Vin (min) (V) 2.8 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 3 Iout (max) (A) 0.8 Iq (typ) (mA) 3.4 Features Enable, True Shutdown Operating temperature range (°C) -40 to 85 Dimming method Analog, PWM Number of channels 4 Rating Catalog
WQFN (RTW) 24 16 mm² 4 x 4
  • Up to 800mA Output Current
  • Wide Operating Input Voltage Range: 2.8V to 5.5V
  • Drives 1, 2, 3 or 4 LEDs in Parallel
  • Ability to Disable One Current Sink Via the SEL Pin to Accommodate 3-LED Flash Modules
  • Time-Out Circuitry Limits Flash Duration to 1 Second
  • TX Input Ensures Synchronization with RF Power Amplifier Pulse
  • Adaptive 1x, 1.5x and 2x Gains for Maximum Efficiency
  • 1MHz Constant Frequency Operation
  • Output Current Limit
  • True Shutdown Output Disconnect
  • <1µA Shutdown Current
  • Internal Soft-Start Limits Inrush Current
  • No Inductor Required
  • Total Solution Size without LED <28mm2
  • Low Profile 24-Pin WQFN Package (4mm x 4mm x 0.8mm)

All trademarks are the property of their respective owners.

  • Up to 800mA Output Current
  • Wide Operating Input Voltage Range: 2.8V to 5.5V
  • Drives 1, 2, 3 or 4 LEDs in Parallel
  • Ability to Disable One Current Sink Via the SEL Pin to Accommodate 3-LED Flash Modules
  • Time-Out Circuitry Limits Flash Duration to 1 Second
  • TX Input Ensures Synchronization with RF Power Amplifier Pulse
  • Adaptive 1x, 1.5x and 2x Gains for Maximum Efficiency
  • 1MHz Constant Frequency Operation
  • Output Current Limit
  • True Shutdown Output Disconnect
  • <1µA Shutdown Current
  • Internal Soft-Start Limits Inrush Current
  • No Inductor Required
  • Total Solution Size without LED <28mm2
  • Low Profile 24-Pin WQFN Package (4mm x 4mm x 0.8mm)

All trademarks are the property of their respective owners.

The LM2754 is an integrated low noise, high current switched capacitor DC/DC converter with four regulated current sinks. The device is optimized for driving 1 to 4 high power white LEDs in parallel with a maximum current of 800mA. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements.

Two external low power resistors set the desired current for Torch and Flash modes. The TX pin allows the device to be forced into Torch mode during a Flash pulse, allowing for synchronization between the RF power amplifier pulse and Flash/Torch modes. To protect the device and Flash LEDs, internal Time-Out circuitry turns off the LM2754 in case of a faulty prolonged Flash mode. Internal soft-start circuitry limits the amount of inrush current during start-up.

The LM2754 is available in a small 24-pin thermally enhanced WQFN package.

The LM2754 is an integrated low noise, high current switched capacitor DC/DC converter with four regulated current sinks. The device is optimized for driving 1 to 4 high power white LEDs in parallel with a maximum current of 800mA. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements.

Two external low power resistors set the desired current for Torch and Flash modes. The TX pin allows the device to be forced into Torch mode during a Flash pulse, allowing for synchronization between the RF power amplifier pulse and Flash/Torch modes. To protect the device and Flash LEDs, internal Time-Out circuitry turns off the LM2754 in case of a faulty prolonged Flash mode. Internal soft-start circuitry limits the amount of inrush current during start-up.

The LM2754 is available in a small 24-pin thermally enhanced WQFN package.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM2754 800mA Switched Capacitor Flash LED Driver with Time-Out Protection 数据表 (Rev. A) 2013年 5月 1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
EVM 用户指南 AN-1546 LM2754 Evaluation Board (Rev. A) 2013年 4月 30日

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  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
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  • 材料成分
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