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
TAS5558 - 具有异步取样率转换器 (ASRC) 和脉宽调制 (PWM) 输出的 8 通道高清 (HD) 可兼容音频处理器TPS2145 - 用于 USB、DSP 和便携应用领域的可调节 LDO + 双路开关，工作态低电平启用DCP020515D - 微型 2W 隔离未稳压 DC/DC 转换器MSP430F233 - 16 位超低功耗微控制器，具有 8KB 闪存、1KB RAM、12 位 ADC、USCI 和 HW 乘法器LP38859 - 具有软启动的 3A 快速响应高分辨率 LDO 线性稳压器TLC59582 - 48 通道、16 位 ES-PWM LED 驱动器，具有预充电 FET、LOD Caterpillar 和TPS65176 - 用于电视的 LCD 偏置 ICPCM5102A - 具有 32 位 1.8V IO 的 2VRMS DirectPath? 111/106/100dB 音频立体声 DACTPS2049 - SINGLE-CHANNEL 100ma POWER SWITCHLMP91300 - LMP91300 电感接近传感器 AFE
