LM4671
- No Output Filter Required for Inductive Loads
- Externally Configurable Gain
- Very Fast Turn On Time: 17μs (typ)
- Minimum External Components
- "Click and pop" Suppression Circuitry
- Micro-Power Shutdown Mode
- Available in Space-Saving DSBGA Package
Key Specifications
- Efficiency @ 3.6V, 100mW into 8Ω Speaker: 80 % (typ)
- Efficiency @ 3.6V, 400mW into 8Ω Speaker: 88 % (typ)
- Efficiency @ 5V, 1W into 8Ω Speaker: 86 % (typ)
- Quiescent Current, 3.6V Supply: 2.8 mA (typ)
- Total Shutdown Power Supply Current: 0.01 µA (typ)
- Single Supply Range: 2.4 to 5.5 V
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The LM4671 is a single supply, high efficiency 2.5W switching audio amplifier. A low noise, filterless PWM architecture eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design.
The LM4671 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 5V supply, it is capable of driving a 4Ω speaker load at a continuous average output of 2.1W with less than 1% THD+N. Its flexible power supply requirements allow operation from 2.4V to 5.5V.
The LM4671 has high efficiency with speaker loads compared to a typical Class AB amplifier. With a 3V supply driving an 8Ω speaker, the IC's efficiency for a 100mW power level is 80%, reaching 88% at 400mW output power.
The LM4671 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND).
The gain of the LM4671 is externally configurable which allows independent gain control from multiple sources by summing the signals.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM4671 Filterless High Efficiency 2.5W Switching Audio Amplifier datasheet (Rev. D) | 2013年 5月 2日 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點