LM2759 - 具有 I2C 兼容接口的 1A 开关电容器闪存 LED 驱动器

LM2759是TI德州仪器公司的一款相机闪光灯LED驱动器产品，LM2759是具有 I2C 兼容接口的 1A 开关电容器闪存 LED 驱动器，本站介绍了LM2759的封装应用图解、特点和优点、功能等，并给出了与LM2759相关的TI元器件型号供参考。

LM2759 - 具有 I2C 兼容接口的 1A 开关电容器闪存 LED 驱动器 - 相机闪光灯LED驱动器 - LED驱动器 - 德州仪器

产品描述

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.

产品特性

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)

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