LM3463
- Dynamic Headroom Control Output to Maximize Efficiency
- 6 Channels Current Regulated LED Driver
- High Precision Analog Dimming Control Interface
- 4 Individual PWM Dimming Control Input
- Dimming Control via Digital Data Bus
- Built-In Maximum MOSFET Power Limiting Mechanism
- Allows Cascade Operation to Extend the Output Channels
- Fault Indicator Output
- Thermal Shutdown
- UVLO With Hysteresis
- 48L WQFN Package
Key Specifications
- Wide supply voltage range (12V-95V)
- Thermal fold-back dimming control
- DHC regulates the lowest MOSFET drain voltage to 1V
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The LM3463 is a six channel linear LED driver with Dynamic Headroom Control (DHC) interface that is specialized for high power LED lighting applications. The variation of the output current of every output channel in the temperature range of -40°C to 125°C is well controlled to less than ±1%. The output current of every channel is accurately matched to each other with less than ± 1% difference as well.
By interfacing the LM3463 to the output voltage feedback node of a switching power supply via the DHC interface, the system efficiency is optimized automatically. The dynamic headroom control circuit in the LM3463 minimizes power dissipation on the external MOSFETs by adjusting the output voltage of the primary switching power supply according to the changing forward voltage of the LEDs. Comprising the advantages of linear and switching converters, the LM3463 delivers accurately regulated current to LEDs while maximizing the system efficiency.
The dimming control interface of the LM3463 accepts both analog and PWM dimming control signals. The analog dimming control input controls the current of all LEDs while the PWM control inputs control the dimming duty of output channels individually.
All trademarks are the property of their respective owners.
The LM3463 provides a sophisticated protection mechanism that secures high reliability and stability of the lighting system. The protection features include VIN Under-Voltage–Lock-Out (UVLO), thermal shut-down, LED short / open circuit protection and MOSFET drain voltage limiting. The LED short circuit protection protects both the LED and MOSFETS by limiting the power dissipation on the MOSFETS.
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 | LM3463 Dynamic Headroom Contrler w/ Thermal Cntrol Intrface/Indvl Chnl Dimg Cntr データシート (Rev. A) | 2013年 5月 1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 | AN-2255 LM3463 Evaluation Board (Rev. A) | 2013年 5月 3日 |
設計および開発
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LM3463EVM — LM3463EVM 評価モジュール
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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 |
---|---|---|
WQFN (RHS) | 48 | 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