LM4906
- Selectable gain of 6dB (2V/V) or 12dB (4V/V)
- No output or PSRR bypass capacitors required
- Improved "Click and Pop" suppression circuitry
- Very fast turn on time: 5ms (typ)
- Minimum external components
- 2.6 - 5.5V operation
- BTL output can drive capacitive loads
- Ultra low current shutdown mode (SD Low)
The LM4906 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1W of continuous average power to an 8 BTL load with less than 1% distortion (THD+N) from a +5V power supply.
The LM4906 is the first National Semiconductor Boomer Power Amplifier that does not require an external PSRR bypass capacitor. The LM4906 also has an internal selectable gain of either 6dB or 12dB. In addition, no output coupling capacitors or bootstrap capacitors are required which makes the LM4906 ideally suited for cell phone and other low voltage portable applications.
The LM4906 contains advanced pop and click circuitry that eliminates noise, which would otherwise occur during turn-on and turn-off transitions.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4906 features a low -power consumption shutdown mode (the part is enabled by pulling the SD pin high). Additionally, the LM4906 features an internal thermal shutdown protection mechanism.
Key Specifications
Improved PSRR at 217Hz for +3V | 71dB |
Power Output at +5V, THD+N = 1%, 8 | 1.0W (typ) |
Power Output at +3V, THD+N = 1%, 8 | 390mW (typ) |
Total shutdown power supply current | 0.1µA (typ) |
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 | LM4906 1W, Bypass-Cap-less Audio Amp w/Internal Selectable Gain (jp) データシート (Rev. D 翻訳版) | 最新英語版 (Rev.E) | PDF | HTML | 2005年 1月 12日 |
設計および開発
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LM4906MMBD — 1W、バイパス・キャパシタ不要 オーディオ・パワー・アンプ、内部ゲイン選択付
The LM4906 is capable of delivering 1W of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a +5V power supply.
It is the first National Semiconductor Boomer Power Amplifier that does not require an external PSRR bypass capacitor. In addition, no output coupling (...)
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 |
---|---|---|
VSSOP (DGK) | 8 | 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