LM3409
- LM3409-Q1 and LM3409HV-Q1 are Automotive Grade Products: AEC-Q100 Grade 1 Qualified
- 2-Ω, 1-A Peak MOSFET Gate Drive
- VIN Range: 6 V to 42 V (LM3409, LM3409-Q1)
- VIN Range: 6 V to 75 V (LM3409HV, LM3409HV-Q1)
- Differential, High-Side Current Sense
- Cycle-by-Cycle Current Limit
- No Control Loop Compensation Required
- 10,000:1 PWM Dimming Range
- 250:1 Analog Dimming Range
- Supports All-Ceramic Output Capacitors and Capacitor-less Outputs
- Low-Power Shutdown and Thermal Shutdown
- Thermally Enhanced 10-Pin, HVSSOP Package
The LM3409, LM3409-Q1, LM3409HV, and LM3409HV-Q1 are P-channel MOSFET (PFET) controllers for step-down (buck) current regulators. They offer wide input voltage range, high-side differential current sense with low adjustable threshold voltage and fast output enable/disable function and a thermally enhanced 10-pin, HVSSOP package. These features combine to make the LM3409 family of devices ideal for use as constant current sources for driving LEDs where forward currents up to 5 A are easily achievable.
The LM3409 devices use constant off-time (COFT) control to regulate an accurate constant current without the need for external control loop compensation. Analog and PWM dimming are easy to implement and result in a highly linear dimming range with excellent achievable contrast ratios. Programmable UVLO, low-power shutdown, and thermal shutdown complete the feature set.
For all available packages, see the orderable addendum at the end of the data sheet.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 | LM3409, -Q1, LM3409HV, -Q1 P-FET Buck Controller for High-Power LED Drivers datasheet (Rev. L) | PDF | HTML | 2016/5/23 | ||
| 技術文章 | Dimming in switched-mode LED drivers | PDF | HTML | 2018/8/13 | |||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 白皮書 | LED Drivers for Automotive Exterior Applications (Rev. B) | 2018/3/27 | ||||
| 技術文章 | Color the world with what’s next in RGBW LED light source technology – part 2 | PDF | HTML | 2017/8/16 | |||
| 技術文章 | Color the world with what’s next in RGBW LED light source technology – part 1 | PDF | HTML | 2017/8/3 | |||
| 技術文章 | LED brightness adjustment: high-frequency PWM dimming | PDF | HTML | 2016/8/26 | |||
| 應用說明 | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013/5/3 | ||||
| 使用指南 | AN-1954 LM3409 Demonstration Board (Rev. D) | 2013/5/1 | ||||
| 應用說明 | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 2013/4/23 | ||||
| 應用說明 | Dimming Techniques for Switched-Mode LED Drivers | 2009/7/30 |
設計與開發
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LM3409EVAL — LM3409 展示板
This demonstration board showcases the LM3409 PFET controller for a buck current regulator. It is designed to drive 4 LEDs (VO = 15V) at a maximum average LED current (ILED = 1A) from a DC input voltage (VIN = 24V). The switching frequency (fSW = 525 kHz) is targeted for the nominal operating (...)
PMP6024 — 100-240VAC 輸入、60W、雙燈串、PWM 可調光 LED 驅動器參考設計
PMP6024 是一款離線 LED 驅動器電路，由隔離式功率因數修正、恆定輸出電壓返馳式轉換器組成，後接兩個 DC/DC 降壓 LED 電流控制器。 適合室內或室外區域照明應用 3,500-5,000 流明（取決於 LED 選擇）。 LED 亮度由 3.3V、10kHz PWM 訊號控制，該訊號會轉換為 LED 燈串電流的 DC 位準調整，以避免光輸出的 PWM 調變。
TIDA-01415 — 100W、高解析度、16 位元色彩可調、0.15% 可調光 RGBW LED 照明燈具參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| PDIP (NFF) | 14 | Ultra Librarian |
| HVSSOP (DGQ) | 10 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。