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MAX8879 用于背光/闪光灯/RGB LED驱动的安全定

发布:admin01-14分类病毒防御

MAX8879 用于背光/闪光灯/RGB LED驱动的安全定时器
MAX8879概述 The MAX8879 features an internally trimmed reference to set the maximum LED current. An I²C serial port is used for on/off control and setTIng the LED currents in 32 linear steps for main, sub/RGB, and movie. When using the RGB indicator, the I²C port provides 32k colors and programmable ramp-up/down rates. The camera flash for flash-mode operaTIon is enabled by an acTIve-low signal on the acTIve-low FSH pin. A safety timer is activated on the falling edge of active-low FSH, which has an I²C-adjustable (programmable) period of no timer, 0.5s, 1.0s, or 2.0s (default). If the safety timer period expires, both flash and movie modes are disabled. MAX8879关键特性Guaranteed 610mA Continuous Drive Capability 4 LEDs at 30mA Each for Main Display 3 LEDs at 30mA Each for Sub or RGB 400mA Total for Flash 2-Wire I²C Serial Port 5-Bit (32-Step) Linear Dimming 32k Colors Ramp-Up/Down Rates 92% Peak/83% Avg Efficiency (PLED/PBATT) Adaptive 1x/1.5x/2x Mode Switchover 0.3% (typ) LED Current Accuracy and Matching Low Input Ripple and EMI Low 0.1µA Shutdown Current Output Overvoltage Protection I²C Programmable Flash Safety Timer Thermal Derating Function Protects LEDs 24-Pin, 4mm x 4mm Thin QFN Package

MAX8879应用/使用

蜂窝电话与智能电话
LED显示器,多达11个LED
PDA、数码相机、便携式摄像机

MAX8879 pdf datasheet

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