LM4890
- Available in Space-Saving Packages: DSBGA, VSSOP, SOIC, and WSON
- Ultra Low Current Shutdown Mode
- BTL Output Can Drive Capacitive Loads
- Improved Pop & Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions
- 2.2 - 5.5V Operation
- No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
- Thermal Shutdown Protection
- Unity-Gain Stable
- External Gain Configuration Capability
Key Specifications
- PSRR at 217Hz, VDD = 5V (Fig. 1): 62dB(typ.)
- Power Output at 5.0V & 1% THD: 1W(typ.)
- Power Output at 3.3V & 1% THD: 400mW(typ.)
- Shutdown Current: 0.1μA(typ.)
All trademarks are the property of their respective owners.
The LM4890 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4890 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.
The LM4890 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4890 features an internal thermal shutdown protection mechanism.
The LM4890 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions.
The LM4890 is unity-gain stable and can be configured by external gain-setting resistors.
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 | LM4890 1 Watt Audio Power Amplifier データシート (Rev. L) | 2013/05/03 |
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。
| 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 |
| SOIC (D) | 8 | 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。