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LM3405A

現行

具內部補償的 1.6-MHz，1-A 定電流降壓 LED 驅動器

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產品規格表

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LM3405A

現行
立即訂購

產品詳細資料

Input voltage type DC/DC Topology Buck Vin (min) (V) 3 Vin (max) (V) 22 Vout (max) (V) 20 Vout (min) (V) 0.2 Iout (max) (A) 1 Iq (typ) (mA) 1.8 Features Enable/Shutdown, Integrated Switch, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method PWM Number of channels 1 Rating Catalog
Input voltage type DC/DC Topology Buck Vin (min) (V) 3 Vin (max) (V) 22 Vout (max) (V) 20 Vout (min) (V) 0.2 Iout (max) (A) 1 Iq (typ) (mA) 1.8 Features Enable/Shutdown, Integrated Switch, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method PWM Number of channels 1 Rating Catalog
HVSSOP (DGN) 8 14.7 mm² (3 mm × 4.9 mm) SOT-23-THN (DDC) 6 8.12 mm² (2.9 mm × 2.8 mm)
  • VIN Operating Range of 3 V to 22 V
  • Drives up to 5 High-Brightness LEDs in Series at 1 A
  • Thin SOT-6 and MSOP-PowerPAD™-8 Packages
  • 1.6-MHz Switching Frequency
  • EN/DIM Input for Enabling and PWM Dimming of LEDs
  • 300-mΩ NMOS Switch
  • 40-nA Shutdown Current at VIN = 5 V
  • Internally Compensated Current-mode Control
  • Cycle-by-Cycle Current Limit
  • Input Voltage UVLO
  • Overcurrent Protection
  • Thermal Shutdown
  • VIN Operating Range of 3 V to 22 V
  • Drives up to 5 High-Brightness LEDs in Series at 1 A
  • Thin SOT-6 and MSOP-PowerPAD™-8 Packages
  • 1.6-MHz Switching Frequency
  • EN/DIM Input for Enabling and PWM Dimming of LEDs
  • 300-mΩ NMOS Switch
  • 40-nA Shutdown Current at VIN = 5 V
  • Internally Compensated Current-mode Control
  • Cycle-by-Cycle Current Limit
  • Input Voltage UVLO
  • Overcurrent Protection
  • Thermal Shutdown

The LM3405A is a 1-A constant current buck LED driver designed to provide a simple, high efficiency solution for driving high power LEDs. With a 0.205-V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. Switching frequency is internally set to 1.6 MHz, allowing small surface mount inductors and capacitors to be used. The LM3405A uses current-mode control and internal compensation offering ease of use and predictable, high performance regulation over a wide range of operating conditions. With a maximum input voltage of 22 V, the device can drive up to 5 High-Brightness LEDs in series at 1-A forward current, with the single LED forward voltage of approximately 3.7 V. Additional features include user accessible EN/DIM pin for enabling and PWM dimming of LEDs, thermal shutdown, cycle-by-cycle current limit and overcurrent protection.

The LM3405A is a 1-A constant current buck LED driver designed to provide a simple, high efficiency solution for driving high power LEDs. With a 0.205-V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. Switching frequency is internally set to 1.6 MHz, allowing small surface mount inductors and capacitors to be used. The LM3405A uses current-mode control and internal compensation offering ease of use and predictable, high performance regulation over a wide range of operating conditions. With a maximum input voltage of 22 V, the device can drive up to 5 High-Brightness LEDs in series at 1-A forward current, with the single LED forward voltage of approximately 3.7 V. Additional features include user accessible EN/DIM pin for enabling and PWM dimming of LEDs, thermal shutdown, cycle-by-cycle current limit and overcurrent protection.
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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 LM3405A 1.6-MHz, 1-A Constant Current Buck LED Driver With Internal Compensation in Tiny SOT and MSOP-PowerPAD™ Packages datasheet (Rev. D) PDF | HTML 2016/9/19
白皮書 Common LED Functions and LED Driver Design Considerations 2020/9/21
應用說明 AN-1656 Design Challenges of Switching LED Drivers (Rev. A) 2013/5/3
應用說明 Powering & Dimming High-Brightness LEDs w/ LM3405 Constant-Current Buck Reg (Rev. A) 2013/5/1
使用指南 AN-1685 LM3405A Demo Board (Rev. B) 2013/5/1
應用說明 AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) 2013/4/23
使用指南 LM3405A Reference Design for MR16 LED Bulb, 600mA User Guide 2012/1/27

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LM3405AEVAL — 採用小型 SOT-23 封裝且具有內部補償的 1.6 MHz、1A 定電流降壓 LED 驅動器

The LM3405A demo board is configured to drive a series string of high power, high brightness LEDs at a forward current of 1A using the LM3405A constant current buck regulator. The board can accept a full input operating range of 3V to 22V. The converter output voltage adjusts as needed to maintain (...)

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開發板

LM3405AXMYEVAL — LM3405AXMY - 採用 eMSOP 封裝的 1.6 MHz、1A 定電流降壓 LED 驅動器 EVM

LM3405A is a 1A constant current buck LED driver designed to provide a simple high efficiency solution for driving high power LEDs. With a 0.205V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. (...)

使用指南: PDF
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HVSSOP (DGN) 8 Ultra Librarian
SOT-23-THN (DDC) 6 Ultra Librarian
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