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LM3466

現行

與定電流電源配合使用的多串 LED 電流平衡器

產品詳細資料

Input voltage type DC Linear, DC/DC Topology Current Sink, Multi-Channel Vin (min) (V) 6 Vin (max) (V) 70 Vout (max) (V) 70 Vout (min) (V) 0 Iout (max) (A) 1.5 Iq (typ) (mA) 0.55 Features Integrated Switch, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method Analog Number of channels 1 Rating Catalog
Input voltage type DC Linear, DC/DC Topology Current Sink, Multi-Channel Vin (min) (V) 6 Vin (max) (V) 70 Vout (max) (V) 70 Vout (min) (V) 0 Iout (max) (A) 1.5 Iq (typ) (mA) 0.55 Features Integrated Switch, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method Analog Number of channels 1 Rating Catalog
HSOIC (DDA) 8 29.4 mm² 4.9 x 6 TO-220 (NEC) 7 45.212 mm² 10.16 x 4.45
  • Easy to Design for Lighting Systems Consisting of Multiple LED Strings (Supports Modular Design)
  • Automatically Balances the Current of Every Active LED String, even the Forward Voltage of Each String is Different
  • Easy to Pre-Set and Fine-Tune Current Ratio Among LED Strings (e.g., color temperature adjustment or CRI Enhancement)
  • ±1% Current Accuracy at Room Temperature and ±1.5% Over Temperature
  • Maintains Constant Output Power if Some Strings Open (inactive) by Automatically Balancing the Current of Remaining Active LED Strings
  • Works with a Constant Current Power Supply (ac/dc or dc/dc), and no Communication to/from the Constant Current Power Supply is Required
  • Operates with Minimum Voltage Overhead to Maximize Power Efficiency
  • Wide Input Voltage Range from 6 V to 70 V
  • Fault Status Output
  • Thermal Shutdown
  • Integrated 70-V, 1.5-A MOSFET with 2.06 A Current Limit
  • Maximum 70-V per LED String, 20 LEDs
  • Linear Circuitry Does Not Deteriorate EMI
  • DDA-8 Exposed Thermal Pad and TO220-7 Packages
  • Easy to Design for Lighting Systems Consisting of Multiple LED Strings (Supports Modular Design)
  • Automatically Balances the Current of Every Active LED String, even the Forward Voltage of Each String is Different
  • Easy to Pre-Set and Fine-Tune Current Ratio Among LED Strings (e.g., color temperature adjustment or CRI Enhancement)
  • ±1% Current Accuracy at Room Temperature and ±1.5% Over Temperature
  • Maintains Constant Output Power if Some Strings Open (inactive) by Automatically Balancing the Current of Remaining Active LED Strings
  • Works with a Constant Current Power Supply (ac/dc or dc/dc), and no Communication to/from the Constant Current Power Supply is Required
  • Operates with Minimum Voltage Overhead to Maximize Power Efficiency
  • Wide Input Voltage Range from 6 V to 70 V
  • Fault Status Output
  • Thermal Shutdown
  • Integrated 70-V, 1.5-A MOSFET with 2.06 A Current Limit
  • Maximum 70-V per LED String, 20 LEDs
  • Linear Circuitry Does Not Deteriorate EMI
  • DDA-8 Exposed Thermal Pad and TO220-7 Packages

The LM3466 integrates a linear LED driver for lighting systems which consist of multiple LED strings powered by a constant current power supply. It balances the current provided by the supply in a pre-set ratio for each active LED string, where an active string is a fully turned on LED string, regardless of the number of strings connected to the supply or the forward voltage of each LED string. If any LED string opens during operation, the LM3466 automatically balances the supply current through all of the remaining active LED strings. As a result, the overall brightness of the lighting system is maintained even if some LED strings open during operation.

The LM3466 lighting system is simple to design owing to a proprietary control scheme. To minimize the component count, the LM3466 integrates a 70-V, 1.5-A, N-channel power MOSFET with a current limit of 2.06 A. To add one more LED string to the system, only a single resistor, a capacitor, and a LM3466 are required. Other supervisory features of the LM3466 include under-voltage lock-out, fault reporting, thermal latch off, and thermal shutdown protection.

The LM3466 consists of only linear circuitry so that the EMI of the application circuit is not deteriorated. The LM3466 lighting system is EMI friendly if the constant current power supply used is complied to EMI standards. The LM3466 is available in the DDA-8 exposed thermal pad and TO220-7

The LM3466 integrates a linear LED driver for lighting systems which consist of multiple LED strings powered by a constant current power supply. It balances the current provided by the supply in a pre-set ratio for each active LED string, where an active string is a fully turned on LED string, regardless of the number of strings connected to the supply or the forward voltage of each LED string. If any LED string opens during operation, the LM3466 automatically balances the supply current through all of the remaining active LED strings. As a result, the overall brightness of the lighting system is maintained even if some LED strings open during operation.

The LM3466 lighting system is simple to design owing to a proprietary control scheme. To minimize the component count, the LM3466 integrates a 70-V, 1.5-A, N-channel power MOSFET with a current limit of 2.06 A. To add one more LED string to the system, only a single resistor, a capacitor, and a LM3466 are required. Other supervisory features of the LM3466 include under-voltage lock-out, fault reporting, thermal latch off, and thermal shutdown protection.

The LM3466 consists of only linear circuitry so that the EMI of the application circuit is not deteriorated. The LM3466 lighting system is EMI friendly if the constant current power supply used is complied to EMI standards. The LM3466 is available in the DDA-8 exposed thermal pad and TO220-7

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類型 標題 日期
* Data sheet Multi-String LED Current Balancer for Use with Constant Current Power Supplies datasheet (Rev. F) 2013年 9月 12日
White paper Common LED Functions and LED Driver Design Considerations 2020年 9月 21日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
User guide AN-2182 LM3466 Demonstration Board Reference Design (Rev. A) 2013年 5月 1日
Product overview LM3466 Smart Linear LED Driver for Multi-Channel LED Systems 2011年 9月 27日

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開發板

LM3466MREVAL — LM3466 LED 驅動器 5 燈串參考板

The LM3466 integrates a linear LED driver for lighting systems which consist of multiple LED strings powered by a constant current power supply. The LM3466 equalizes the current provided by the supply in a pre-set ratio for each active LED string, where an active string is a fully turned on LED (...)

使用指南: PDF
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模擬型號

LM3466 PSpice Transient Model

SNOM462.ZIP (63 KB) - PSpice Model
模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HSOIC (DDA) 8 Ultra Librarian
TO-220 (NEC) 7 Ultra Librarian

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