ST LED1642GW高亮度RGB LED阵列驱动解决方案
ST公司的LED1642GW是单片低压低电流16位移位寄存器,保证20V输出,能驱动几串串联的LED,输出级,16个稳压电流源提供3-40mA恒流来驱动LED,电流通过外接电阻可编程, 12/16位PWM亮度调节,工作电压3V-5.5V,主要用在全彩色/单色大型显示屏和LED标识牌.本文介绍了LED1642GW主要特性,框图和典型应用电路,以及采用LED1642GW和STM32 MCU的高亮度RGB LED阵列驱动评估板STEVAL-ILL061V1主要特性,框图,电路图,材料清单和PCB设计资料.
The LED1642GW is a monolithic, low voltage, low current power 16-bit shift register designed for LED panel displays. The LED1642GW guarantees 20 V output driving capability allowing the user to connect several LEDs in series. In the output stage, sixteen regulated current sources provide from 3 mA to 40 mA constant current to drive the LEDs. The current is programmed through an external resistor and can be adjusted by 7-bit current gain register in two subranges.The brightness can be adjusted separately for each channel through a 12/16-bit grayscale control.A programmable turn-on and turn-off time (four different values are available) improves the system low noise generation performances.
In the LED1642GW is available the open/short error detection mode. The auto power shutdown and auto power-on feature (this feature is selectable) allow the device to save power without any external intervention.
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