- 制造厂商：TI
- 产品类别：电源管理
- 技术类目：LED 驱动器 - 照明 LED 驱动器
- 功能描述：具有超时保护功能的 800mA 开关电容器 LED 闪光灯驱动器
- 点击这里打开及下载LM2754的技术文档资料
- TI代理渠道，提供当日发货、严格的质量标准，满足您的目标价格
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.
- 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.
- Input voltage (type)
- DC/DC
- Topology
- Charge pump, Current Mode
- Vin (Min) (V)
- 2.8
- Vin (Max) (V)
- 5.5
- 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
LM2754的完整型号有：LM2754SQ/NOPB，以下是这些产品的关键参数及官网采购报价：
LM2754SQ/NOPB，工作温度：-40 to 85，封装：WQFN (RTW)-24，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM2754SQ/NOPB的批量USD价格：.66（1000+）
PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice
PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。借助?PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。
在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)
