LM3555 - 具有 500 mA 高侧 LED 驱动器和双模控制接口的同步升压转换器
LM3555是TI公司的一款相机闪光灯LED驱动器产品，LM3555是具有 500 mA 高侧 LED 驱动器和双模控制接口的同步升压转换器，本页介绍了LM3555的产品说明、应用、特性等，并给出了与LM3555相关的TI元器件型号供参考。
LM3555 - 具有 500 mA 高侧 LED 驱动器和双模控制接口的同步升压转换器 - 相机闪光灯LED驱动器 - LED驱动器 - TI公司（Texas Instruments，德州仪器）
产品描述
The LM3555 is a 2 MHz fixed frequency, current mode synchronous boost converter designed to drive either a single flash LED at 500 mA or two series flash LEDs at 400 mA. A high-voltage current source allows the LEDs to be terminated to the GND plane eliminating the need for an additional return trace back to the IC.
A dual mode control interface allows the user to configure the LM3555 with a general-purpose interface using two enable pins for control or an I 2C allowing a higher level of control. Both interfaces allow access to the indicator, assist light and flash modes. A dedicated Strobe pin provides a direct interface to trigger the flash event, while an external Torch pin provides an additional method for enabling the LEDs in a constant current mode.
The LM3555 can adaptively scale the maximum flash level delivered to the LED/LEDs based upon the flash configuration, whether it be a single LED or two LEDs in series.
Eight protection features are available on the LM3555 ranging from over-voltage protection to broken inductor detection. The LM3555 has four selectable inductor current limits to help the user select an inductor that is appropriate for the design.
产品特性
High-Voltage High-Side Current Source Allows for Grounded Cathode LED Operation Synchronous Boost Converter Peak Converter Efficiency >90% Accurate and Programmable LED Current ranging from 60 mA to 500 mA Adaptive LED Current Range Based on LED Configuration Dedicated Indicator Current Source Dedicated Torch and Strobe Pins Dual Mode Control (General Purpose or I 2C) Broken Inductor Detection Output Over-Voltage Protection Output and LED Short-Circuit Protection 400kHz I 2C-Compatible Interface 12-Bump, 1.575 mm x 2.1 mm x 0.6 mm micro SMD Package (TLA12BCA)
下面可能是您感兴趣的TI公司相机闪光灯LED驱动器元器件
DS92CK16 - 3V BLVDS 1 至 6 时钟缓冲器/总线收发器TPS2838 - 具有内部可调节稳压器的同向快速同步降压 MOSFET 驱动器SN74AS373 - 具有三态输出的八路 D 类透明锁存器TPS62402 - 具有 1 线接口、采用 QFN 封装的双路 400mA 和 600mA、2.25MHz 降压转换器LMV228 - 采用微型 SMD 封装的射频功率检测器，用于 CDMA 和 WCDMASN74AUP1G02 - 低功耗单路 2 输入正或非门LP2954A - 5V 微功耗低压降稳压器SN75LVDS84A - FlatLink(TM) 发送器LM3535 - 具有环境光传感和动态背光控制兼容性的多显示 LED 驱动器MSP430F167 - 16 位超低功耗 MCU，具有 32kB 闪存、1024B RAM、12 位 ADC、双 DAC、2 个 USART、I2C、HW 乘法器和 DMA
