LM3414SD/NOPB 供应商
-
LM3414SD/NOPB
品牌：TI 封装/批号：原厂原装/22+ -
LM3414SD/NOPB
品牌：TI(德州仪器) 封装/批号：WSON-8/2022+
LM3414SD/NOPB 属性参数
- 制造商：National Semiconductor (TI)
- 输入电压：4.5 V to 42 V
- 工作频率：250 KHz to 1 MHz
- 最大电源电流：3.5 mA
- 输出电流：1 A
- 最大工作温度：+ 125 C
- 安装风格：SMD/SMT
- 封装 / 箱体：LLP-8
- 最小工作温度：- 40 C
- 封装：Reel
- 工厂包装数量：1000
产品特性
- Supports LED Power up to 60 W(1): 18x 3-W HBLEDs
- RequiresNo External Current Sensing Resistor
- ±3% LED Current Accuracy
- Up to 96% Efficiency
- High Contrast Ratio (Minimum Dimming Current Pulse Width <10 µS)
- Integrated Low-Side N-Channel MOSFET
- Adjustable Constant LED Current From 350 mA to 1000 mA
- Support Analog Dimming and Thermal Fold-Back
- Wide Input Voltage Range: 4.5 V to 42 V (LM3414) 4.5 V to 65 V (LM3414HV)
- 4.5 V to 42 V (LM3414)
- 4.5 V to 65 V (LM3414HV)
- Constant Switching Frequency Adjustable from 250 kHz to 1000 kHz
- Thermal Shutdown Protection
- Power Enhanced SOIC-8 or 3 mm × 3 mm WSON-8 Package
产品概述
The LM3414 and LM3414HV are 1-A 60-W(1)
common anode-capable constant current buck LED drivers. They are suitable for driving single
string of 3-W HBLED with up to 96% efficiency. They accept input voltages from 4.5 VDC to 65 VDC
and deliver up to 1-A average LED current with ±3% accuracy. The integrated low-side N-channel
power MOSFET and current sensing element realize simple and low component count circuitry, as no
bootstrapping capacitor and external current-sensing resistor are required. An external
small-signal resistor to ground provides very fine LED current adjustment, analog dimming, and
thermal fold-back functions. Constant switching frequency operation eases EMI. No external loop compensation network
is needed. The proprietary Pulse-Level-Modulation (PLM) control method benefits in high conversion
efficiency and true average LED current regulation. Fast response time realizes fine LED current
pulse fulfilling the 240 Hz 256-step dimming resolution requirement for general lighting. The LM3414 and LM3414HV are available in SOIC-8 and 3 mm × 3 mm WSON-8 packages.
LM3414SD/NOPB 电路图
