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LM3554

アクティブ

1.2A デュアル ハイサイド LED ドライバと I2C 互換インターフェイス搭載、同期整流昇圧コンバータ

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データシート

LM3554

アクティブ
データシート ご注文はこちら

製品詳細

Input voltage type DC/DC Topology Boost, current mode Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Iout (max) (A) 1.2 Iq (typ) (mA) 0.63 Features I2C control Operating temperature range (°C) -30 to 85 Dimming method Analog, PWM Number of channels 2 Rating Catalog
Input voltage type DC/DC Topology Boost, current mode Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Iout (max) (A) 1.2 Iq (typ) (mA) 0.63 Features I2C control Operating temperature range (°C) -30 to 85 Dimming method Analog, PWM Number of channels 2 Rating Catalog
DSBGA (YFQ) 16 3.24 mm² (— mm × — mm)
  • Input Voltage: 2.5 V to 5.5 V
  • Programmable 4.5-V or 5-V Constant Output Voltage
  • Dual High-Side Current Sources
  • Grounded Cathode Allowing for Better Heat Sinking and LED Routing
  • > 90% Efficiency
  • Ultra-Small Solution Size: < 23 mm2
  • Four Operating Modes: Torch, Flash, LED Indicator, and Voltage Output
  • Accurate and Programmable LED Current from 37.5 mA to 1.2 A
  • Hardware Flash and Torch Enable
  • LED Thermal Sensing and Current Scaleback
  • Software Selectable Input Voltage Monitor
  • Programmable Flash Timeout
  • Dual Synchronization Inputs for RF Power-Amplifier Pulse Events
  • Open and Short LED Detection
  • Active High Hardware Enable for Protection Against System Faults
  • 400-kHz I2C-Compatible Interface
  • Input Voltage: 2.5 V to 5.5 V
  • Programmable 4.5-V or 5-V Constant Output Voltage
  • Dual High-Side Current Sources
  • Grounded Cathode Allowing for Better Heat Sinking and LED Routing
  • > 90% Efficiency
  • Ultra-Small Solution Size: < 23 mm2
  • Four Operating Modes: Torch, Flash, LED Indicator, and Voltage Output
  • Accurate and Programmable LED Current from 37.5 mA to 1.2 A
  • Hardware Flash and Torch Enable
  • LED Thermal Sensing and Current Scaleback
  • Software Selectable Input Voltage Monitor
  • Programmable Flash Timeout
  • Dual Synchronization Inputs for RF Power-Amplifier Pulse Events
  • Open and Short LED Detection
  • Active High Hardware Enable for Protection Against System Faults
  • 400-kHz I2C-Compatible Interface

The LM3554 is a 2-MHz fixed-frequency, current-mode synchronous boost converter. The device is designed to operate as a dual 600-mA (1.2 A total) constant-current driver for high-current white LEDs, or as a regulated 4.5-V or 5-V voltage source.

The main features include: an I2C-compatible interface for controlling the LED current or the desired output voltage, a hardware flash enable input for direct triggering of the flash pulse, and dual TX inputs which force the flash pulse into a low-current torch mode allowing for synchronization to RF power amplifier events or other high-current conditions. Additionally, an active high hardware enable (HWEN) input provides a hardware shutdown during system software failures.

Five protection features are available within the LM3554 including a software selectable input voltage monitor, an internal comparator for interfacing with an external temperature sensor, four selectable current limits to ensure the battery current is kept below a predetermined peak level, an overvoltage protection feature to limit the output voltage during LED open circuits, and an output short circuit protection which limits the output current during shorts to GND.

For all available packages, see the orderable addendum at the end of the data sheet.

The LM3554 is a 2-MHz fixed-frequency, current-mode synchronous boost converter. The device is designed to operate as a dual 600-mA (1.2 A total) constant-current driver for high-current white LEDs, or as a regulated 4.5-V or 5-V voltage source.

The main features include: an I2C-compatible interface for controlling the LED current or the desired output voltage, a hardware flash enable input for direct triggering of the flash pulse, and dual TX inputs which force the flash pulse into a low-current torch mode allowing for synchronization to RF power amplifier events or other high-current conditions. Additionally, an active high hardware enable (HWEN) input provides a hardware shutdown during system software failures.

Five protection features are available within the LM3554 including a software selectable input voltage monitor, an internal comparator for interfacing with an external temperature sensor, four selectable current limits to ensure the battery current is kept below a predetermined peak level, an overvoltage protection feature to limit the output voltage during LED open circuits, and an output short circuit protection which limits the output current during shorts to GND.

For all available packages, see the orderable addendum at the end of the data sheet.
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技術資料

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上位の文書 タイプ タイトル フォーマットオプション 最新の英語版をダウンロード 日付
* データシート LM3554 Synchronous Boost Converter With 1.2-A Dual High-Side LED Drivers and I2C-Compatible Interface データシート (Rev. C) PDF | HTML 2016/02/26
ホワイト・ペーパー Common LED Functions and LED Driver Design Considerations.. 英語版 2020/09/21
セレクション・ガイド 電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版) 英語版 (Rev.R) 2018/09/13

設計と開発

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評価ボード

LM3554TMEEV — LM3544 評価ボード

Synchronous Boost Converter with 1.2A Dual High Side LED Drivers and I2C-Compatible Interface

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ドライバまたはライブラリ

LM355XSW-LINUX — Linux ドライバ、LM355X 用

The Linux driver supports the LM355X series of LED Drivers. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

  • lm3554
  • lm3556

 

Linux Source Files

(...)

サポート対象の製品とハードウェア
評価基板 (EVM) 向けの GUI

SNVC046 — LM3554 Graphical User Interface

サポート対象の製品とハードウェア
パッケージ ピン数 CAD シンボル、フットプリント、および 3D モデル
DSBGA (YFQ) 16 Ultra Librarian
TI の評価基板に関する標準契約約款が適用されます。

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