LM3464A
- Wide Input Voltage Range
- 12V-80V (LM3464)
- 12V-95V (LM3464A)
- Dynamic Headroom Control Ensures Maximum Efficiency
- 4 Output Channels With Individual Current Regulation
- High Channel to Channel Accuracy
- Digital PWM/Analog Dimming Control Interface
- Resistor Programmable Dimming Frequency and Minimum Duty Cycle (Analog Dimming Mode)
- Direct Interface to Thermal Sensor
- Fault Detection
- Over Temperature Protection
- Thermal Shutdown
- Under Voltage Lockout
- Thermal Enhanced TSSOP-28 Package
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The LM3464/64A is a 4-channel high voltage current regulator that provides a simple solution for LED lighting applications. The LM3464/64A provides four individual current regulator channels and works in conjunction with external N-channel MOSFETs and sense resistors to give accurate driving current for every LED string. Additionally, the Dynamic Headroom Control (DHC) output can be interfaced to the external power supply to adjust the LED supply voltage to the lowest level that is adequate to maintain all the string currents in regulation, yielding the optimal overall efficiency.
Digital PWM or analog voltage signals can be used to control the duty cycle of the all the channels. When analog control is used, the dimming frequency can be programmed via an external capacitor. A minimum duty cycle control is provided in the conditions that the analog dimming is configured as thermal feedback.
Protection features include VIN under-voltage lock-out, LED open/short circuit and over-temperature fault signaling to the system controller.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM3464/4A LED Driver w/Dynamic Headroom Control & Thermal Control Interfaces datasheet (Rev. F) | 2013/5/1 | |||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 |
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LM3464AEVAL — LM3464A 四通道 LED 驅動器評估板
The LM3464A is a linear LED driver with Dynamic Headroom Control (DHC) technology designed to drive four serial high power / high brightness LED strings. Four individual linear current regulators with low-side N-channel MOSFETs realize regulations of LED currents. The DHC optimizes system (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 28 | Ultra Librarian |