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LM2795BLX 恒流LED驱动电源IC PWM,切换式电容器 背光 325KHz ~ 515KHz 2.7V ~ 5.5V BLP14EHB 46AE 电流调节开关电容/LED电源与模拟/PWM亮度控制

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产品描述
恒流Constant Current是 YES
恒压Constant Voltage
拓扑TopologyPWM,切换式电容器(充电泵) PWM, Switched Capacitor (Charge Pump)
输出数Number of Outputs4
内部驱动器Internal Driver是 YES
初级类型Type - Primary背光 Backlight
次级类型Type - Secondary白色 LED White LED
频率Frequency325KHz ~ 515KHz
电源电压Voltage - Supply2.7V ~ 5.5V
输出电压Voltage - Output
Description & ApplicationsFEATURES • Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control • Regulated current sources with ±0.5% matching between any two outputs • High efficiency 3/2 boost function • Drives one, two, three or four white LEDs • 2.7V to 5.5V Input Voltage • Up to 80mA output current • Analog brightness control • Active-low or high shutdown input (’94/95) • Very small solution size and no inductor • 2.3µA (typ.) shutdown current • 325kHz switching frequency (min.) • Constant Frequency generates predictable noise spectrum • Standard Micro SMD-14 package: 2.08mmX2.403mmX0.845mm High • Thin Micro SMD-14 package: 2.08mmX2.403mm X0.600mm High Applications • White LED Display Backlights • White LED Keypad Backlights • 1-Cell Li-Ion battery-operated equipment including PDAs, hand-held PCs, cellular phones
描述与应用特点 •电流调节开关电容LED电源与模拟和PWM亮度控制 •稳压电流源匹配±0.5%任何两个输出之间 •高效率升压功能3/2 •驱动一个,两个,三个或四个白光LED •2.7V至5.5V的输入电压 •高达80mA的输出电流 •模拟亮度控制 •主动高或低关断输入(94/95) •非常小的解决方案尺寸和无电感器 •2.3μA(典型值)的关断电流 •325kHz开关频率(分钟) •恒频产生可预见的噪声频谱 •标准微SMD-14封装:2.08mmX2.403mmX0.845mm高 •薄微型SMD-14封装:2.08mmX2.403mm X0.600mm高 应用 •白光LED显示器背光 •白光LED键盘背光 •1节锂离子电池供电设备,包括掌上电脑,手持电脑,蜂窝电话
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