LM3642
- 1.5-A High-Side Current Source for Single LED
- > 85% Efficiency in Torch Mode (at 100 mA) and
Flash Mode (at 1 A to 1.5 A) - Accurate Programmable Flash LED Current from
93 mA to 1.5 A - Accurate Programmable Torch LED Currents:
- 48.4 mA to 375 mA
- 24 mA to 187 mA (LT option)
- Small Solution Size: < 20 mm2
- Soft-Start Operation for Battery Protection
- Hardware Strobe Enable
- Synchronization Input for RF Power Amplifier
Pulse Events - VIN Flash Monitor Optimization
- 400-kHz I2C-Compatible Interface
- 0.5-mm Pitch, 9-Bump DSBGA
The LM3642 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing Flash current up to 1.5 A. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.
The LM3642 is controlled via an I2C-compatible interface. Features include a hardware flash enable (STROBE) allowing a logic input to trigger the flash pulse as well as a TX input which forces the flash pulse into a low-current Torch Mode, allowing for synchronization to RF power amplifier events or other high-current conditions.
The 4-MHz switching frequency, overvoltage protection and adjustable current limit settings allow the use of tiny, low-profile inductors and (10-µF) ceramic capacitors. The device is available in a small 9-bump DSBGA package and operates over the −40°C to 85°C temperature range.
技術資料
| 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 | LM3642 1.5-A Synchronous Boost LED Flash Driver With High-Side Current Source データシート (Rev. H) | PDF | HTML | 2015/09/04 | ||
| アプリケーション・ノート | No Boost Inductor Design with LM364x for Long-Time Focusing in Camera Module | PDF | HTML | 2022/02/16 | |||
| 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 | |||
| アプリケーション・ノート | LED Flash-Protection Features | 2017/08/23 |
設計と開発
その他のアイテムや必要なリソースを参照するには、以下のタイトルをクリックして詳細ページをご覧ください。
LM3642TL-LTEVM — LM3642 1.5A 同期整流・昇圧 LED フラッシュ･ドライバ評価基板、ハイサイド電流評価用
1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Evaluation Module Board
The LM3642TL-LT is a 4MHz fixed-frequency synchronous boost converter plus 1.5A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing (...)LM3642TLEVM — LM3642 1.5A 同期ブースト LED フラッシュ･ドライバ、高サイド電流評価モジュール・ボード搭載
1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Evaluation Module Board
The LM3642TL is a 4MHz fixed-frequency synchronous boost converter plus 1.5A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing (...)LM3642SW-LINUX — Linux ドライバ、LM3642 用
The Linux driver supports the LM3642 LED Flash Driver. 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:
- lm3642
Linux Source Files
The files (...)
LM3642 Unencrypted PSpice Transient Model Package (Rev. B)
| 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 (YZR) | 9 | Ultra Librarian |
購入と品質
推奨製品には、この TI 製品に関連するパラメータ、評価基板、またはリファレンス デザインが存在する可能性があります。