- 制造厂商:AD
- 产品类别:LED 驱动器 IC
- 技术类目:降压型 LED 驱动器
- 功能描述:具 3000:1 PWM 调光比的三通道输出 LED 驱动器
- (AD代理渠道,提供当日发货、严格的质量标准,满足您的目标价格)
LT3492 是专为用作一个恒定电流源而设计的三通道输出 DC/DC 转换器,是驱动 LED 的理想选择。LT3492 可工作于降压、升压或降压-升压模式。LT3492 采用一种恒定频率、电流模式架构,因而在一个很宽的电源和输出电压范围内实现稳定操作。一个频率调节引脚允许用户在 330kHz 至 2.1MHz 的范围内设置开关频率,以优化效率和外部组件尺寸。
外部 PWM 输入在每个通道上提供了 3000:1 的 LED 调光控制。三个通道均具有内置栅极驱动器,用于驱动一个外部 LED 断接 P 沟道 MOSFET,从而提供了高调光范围。LT3492 每个通道的输出电流范围利用一个外部检测电阻器来设置。
CTRL 引脚用于调节 LED 电流,以实现模拟调光或过热保护功能。
应用
- RGB 照明
- 广告牌和大型显示器
- 汽车和航空电子照明
- 恒定电流源
- True Color PWM 调光可提供高达 3000:1 的调光比
- 用于 PMOS LED 断接的内置栅极驱动器
- 具 600mA、60V 内部开关的三个独立驱动器通道
- 可工作于降压、升压、降压-升压模式
- CTRL 引脚可在 10mV 至 100mV 的范围内准确地设定 LED 电流检测门限
- 可调频率:330kHz 至 2.1MHz
- 开路 LED 保护
- 宽输入范围:
- 工作电压范围为 3V 至 30V
- 瞬变保护至 40V
- 表面贴装型组件
- 28 引脚 (4mm x 5mm) QFN 和 TSSOP 封装
LT3492EFE#PBF,封装:28-Lead TSSOP w/ EP,包装形式及数量:管装,50,工作温度:-40 to 125C,AD官网报价:5.26(100-499个);4.3(1000+个)
LT3492EFE#TRPBF,封装:28-Lead TSSOP w/ EP,包装形式及数量:卷带,2000,工作温度:-40 to 125C,AD官网报价:5.26(100-499个);4.3(1000+个)
LT3492EUFD#PBF,封装:28-Lead QFN (4mm x 5mm x 0.75mm w/ EP),包装形式及数量:管装,73,工作温度:-40 to 125C,AD官网报价:5.05(100-499个);4.14(1000+个)
LT3492EUFD#TRPBF,封装:28-Lead QFN (4mm x 5mm x 0.75mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:5.05(100-499个);4.14(1000+个)
LT3492IFE#PBF,封装:28-Lead TSSOP w/ EP,包装形式及数量:管装,50,工作温度:-40 to 125C,AD官网报价:6.16(100-499个);5.05(1000+个)
LT3492IFE#TRPBF,封装:28-Lead TSSOP w/ EP,包装形式及数量:卷带,2000,工作温度:-40 to 125C,AD官网报价:6.16(100-499个);5.05(1000+个)
LT3492IUFD#PBF,封装:28-Lead QFN (4mm x 5mm x 0.75mm w/ EP),包装形式及数量:管装,73,工作温度:-40 to 125C,AD官网报价:5.92(100-499个);4.85(1000+个)
LT3492IUFD#TRPBF,封装:28-Lead QFN (4mm x 5mm x 0.75mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:5.92(100-499个);4.85(1000+个)
DC1405A:LT3492EFE Demo Board | Boost/Buck-Boost Triple Output LED Driver, 8V ≤ VIN ≤ 40V, VLED = 54V @ 61mA (x3)
Demonstration circuit 1405 is a Triple Boost or Buck/Boost LED Driver featuring the LT3492. The LT3492 is a triple output DC/DC converter designed to operate as current sources for driving LEDs using . Each of the three regulators on the demo board is independently operated. The board can be configured witheither boost (default) or buck-boost mode; buck mode is not supported. The current for each output is 61mA in either mode.
The IC's input voltage range is 8V to 30V with 40V transient protection; however the LEDs input power source can be as high as 40V. The overvoltage protection (open LED detect) is set at 58V. For a typical application with a LED voltage of 3.6V, each boost circuit can drive around 15 LEDs. Applications with different input voltages and load combinations can be demonstrated on this circuit with some board modifications.