TEXAS INSTRUMENTS LM3434SQ/NOPB 发光二极管驱动器, 1输出, 降压逐步下降, 3V-5.8V输入, 1MHz开关, 27V/6A输出, WQFN-24
The LM3434 is an adaptive constant on-time DC/DC buck step-down constant current controller a true current source. The LM3434 provides a constant current for illuminating high power LEDs. The output configuration allows the anodes of multiple LEDs to be tied directly to the ground referenced chassis for maximum heat sink efficacy. The high frequency capable architecture allows the use of small external passive components and no output capacitor while maintaining low LED ripple current. Two control inputs are used to modulate LED brightness. An analog current control input is provided so the LM3434 can be adjusted to compensate for LED manufacturing variations and/or color temperature correction. The other input is a logic level PWM control of LED current. The PWM functions by shorting out the LED with a parallel switch allowing high PWM dimming frequencies. High frequency PWM dimming allows digital color temperature control, interference blanking, field sequential illumination, and brightness control. Additional features include thermal shutdown, VCC under-voltage lockout, and logic level shutdown mode. The LM3434 is available in a low profile 24-pin WQFN package.
频率 1 MHz
输出接口数 1
输入电压DC 3.00V ~ 5.80V
输出电压 -27.0 V, 27.0 V
输出电流 6 A
针脚数 24
静态电流 1.00 mA
调节输出数 1
开关频率 1 MHz
拓扑结构 Buck
输入电压Max 5.8 V
输入电压Min 3 V
输出电流Max 6 A
工作温度Max 125 ℃
工作温度Min -40 ℃
电源电压 3V ~ 5.8V
安装方式 Surface Mount
引脚数 24
封装 WFQFN-24
宽度 4 mm
封装 WFQFN-24
工作温度 -40℃ ~ 125℃ TJ
产品生命周期 Active
包装方式 Tape & Reel TR
RoHS标准 RoHS Compliant
含铅标准 Lead Free
REACH SVHC版本 2015/06/15
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
LM3434SQ/NOPB TI 德州仪器 | 当前型号 | 当前型号 |
LM3434SQX/NOPB 德州仪器 | 功能相似 | LM3434SQ/NOPB和LM3434SQX/NOPB的区别 |