LM3639A
- Single Chip White LED Flash and Backlight Driver
- 1.5A Flash LED Current
- Dual String Backlight Control (40V Max VOUT)
- 128 Level Exponential and Linear Brightness Control
- PWM Input for CABC
- Programmable Over-Voltage Protection (Backlight)
- Programmable Current Limit (Flash)
- Programmable Switching Frequency
- Optimized Flash Current During Low-Battery Conditions
The LM3639A is a single-chip white LED Camera Flash Driver + LCD Display Backlight Driver. The low-voltage, high-current flash LED driver is a synchronous boost which provides the power for a single flash LED at up to 1.5A or dual LEDs at up to 750 mA each. The high-voltage backlight driver is a dual-output asynchronous boost which powers dual LED strings at up to 40V and 30 mA per string. An adaptive regulation method in both boost converters regulates the headroom voltage across the respective source/sink to ensure the LED current remains in regulation while maximizing efficiency. The LM3639A's flash driver is a 2MHz or 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 Flash current up to 1.5A. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.
The device is controlled by an I2C-compatible interface. Features for the flash LED driver include a hardware flash enable (STROBE) allowing a logic input to trigger the flash pulse, and a TX input for synchronization to RF power amplifier events or other high current conditions. Features for the LCD backlight driver include a PWM input for content adjustable backlight control, 128 exponential or linear brightness levels, programmable over-voltage protection, and selectable switching frequency (500 kHz or 1 MHz).
The device is available in a tiny 1.790 mm x 2.165 mm x 0.6 mm 20-bump, 0.4 mm pitch DSBGA package and operates over the −40°C to +85°C temperature range.
技術資料
種類 | タイトル | 最新の英語版をダウンロード | 日付 | |||
---|---|---|---|---|---|---|
* | データシート | LM3639A Single Chip 40V Backlight + 1.5A Flash LED Driver データシート | 2013年 3月 14日 | |||
ホワイト・ペーパー | Common LED Functions and LED Driver Design Considerations.. | 英語版 | 2020年 9月 21日 | |||
ユーザー・ガイド | LM3639A User's Guide | 2013年 3月 14日 |
設計および開発
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LM3639AYFQEVM — シングルチップ 40V バックライト + 1.5A フラッシュ LED ドライバ評価モジュール・ボード
SingleChip 40V Backlight + 1.5A Flash LED Driver Evaluation Module Board
The LM3639AYFQEVM aids in evaluation of the LM3639A Single-chip white LED Camera Flash Driver + LCD Display Backlight Driver. The low-voltage,high-current flash LED driver is a synchronous boost which provides the power for a (...)LM3639ASW-LINUX — Linux ドライバ、LM3639A 用
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- lm3639a
Linux (...)
LM3639A Unencrypted PSpice Transient Model Package (Rev. B)
PSPICE-FOR-TI — TI Design / シミュレーション・ツール向け PSpice®
設計とシミュレーション向けの環境である PSpice for TI (...)
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) | 20 | Ultra Librarian |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL 定格 / ピーク リフロー
- MTBF/FIT 推定値
- 使用原材料
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点