peculiarity
高压侧电流源，允许接地的LED阴极
高达90％的效率
超小型解决方案尺寸：
三种工作模式：手电筒，闪光灯，和LED指示灯
准确和可编程18毫安600mA的LED电流
五金Flash和火炬启用
LED热感应和电流Scaleback
软件可选的输入电压监视器
可编程Flash超时
双同步输入射频功率放大器脉冲事件
开路和短路LED检测
高电平五金启用对系统故障的防护
400kHz的我 2 C兼容接口
12焊球（1.215毫米×1.615毫米×0.6毫米）的micro SMD
illustrate
The LM3561 is a 2 MHz fixed-frequency, current-mode synchronous boost converter. The device is designed to work as a single 600 mA constant current driver for high current white LEDs. The high-side current source allows the LED to operate with a regulatory headroom voltage of 250mV, ensuring that the current of the LED is well regulated and efficient while still being cathodic grounded.
Key features of the LM3561 include: an I2C compatible hardware flash interface for controlling LED current, enabling direct flash pulses, dual Tx inputs (TX1 and TX2) forcing into low current flare mode in the current instance of high battery flash pulses, triggering input active high hardware enable (HWEN), allowing for quick hard shutdown in case of system software failure, dual-mode pin as an indicator LED up to 18 mA or as a dedicated comparator input driver, internal reference 1V, Designed to monitor voltages throughout the negative temperature coefficient thermistor (NTC), and a programmable input voltage monitor, monitor, and reduce flash current or shut down the device under low battery conditions.
In my reading back the seven fault flags 2C compatible buses. These include: a flash timeout sign indicating that the flash pulse has reached a programmable timeout period, a thermal shutdown sign indicating that the mold temperature of LM3561 has exceeded 150° comet, an LED failure flag indicating that the output voltage has tripped over the voltage threshold at the end of the year, or that the LED has become a short circuit, interrupting the signal bit, if neither of the TX inputs TX1 and TX2 are triggered, an NTC indicator flag LED has experienced more than one temperature condition, and has fallen below a VIN monitor flag indicating the input voltage VIN monitor threshold.
The LM3561 is a micro SMD in a small (1.215 mm× 1.615 mm×0.6 mm) 12-bump bulb and operates over a temperature range of -40°C to +85°C.
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Camera phone LED flash controller
LED current source deviation