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RT9300,低压降定电流白光LED驱动IC

RT9300】低压降定电流白光LED驱动IC

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RT9300 详细介绍
相关商品: HE3602

RT9300是一款用于白光LED驱动的高性能的低压差电流源,可以作为传统白光LED驱动设计中镇流电阻的替代产品使用。RT9300比镇流电阻更具有优势,体现于:超低压差、恒定电流,受电压变化影响小,更小的体积,更高的效率。RT9300适合应用于由电池供电直接驱动白光LED的场合。RT9300通过内置电阻来设置四个LED的输出电流,能在2.5v~6v的电压范围内提供稳定的四路20mA电流,相互之间的匹配度高达3%,而仅需要60mv的跌落电压。产品特点:四路输出,每路20mA电流超低压,20mA时仅有60mV压差高精度3%电流匹配2.5V-6V宽电压输入范围PWM亮度控制温度保护功能

RT9300A/B General Description

The RT9300A/B low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. The RT9300A/B uses an internal resistor to set the bias current for four LEDs, which are matched to 5%. The RT9300A/B's advantages over ballast resistors include much lower bias variation with supply voltage variation, significantly lower dropout voltage, and in some applications, significantly improved efficiency. The RT9300A/B requires only a 60/45mV dropout voltage at a 20/15mA load on each output to match the LED brightness.

 RT9300A/B Ordering Info

Note :
Richtek Pb-free and Green products are :
► RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
► Suitable for use in SnPb or Pb-free soldering processes.

 RT9300A/B Features

• Low 60/45mV Dropout at 20/15mA
• 5% LED Current Matching
• Simple LED Brightness Control
• 2.5V to 5.5V Supply Voltage Range
• Thermal Shutdown Protection
• RoHS Compliant and 100% Lead (Pb)-Free

 RT9300A/B Application

• Next-Generation Wireless Handsets
• PDAs, Palmtops, and Handy Terminals
• Digital Cameras, Camcorders
• Battery-Powered Equipment

 RT9300A/B Pin Configurations

(TOP VIEW)


SOT-23-6

 RT9300A/B Typical Applications Circuit

Figure 1. Application Circuit for Backlight
Figure 2. Application Circuit for Keypad.


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