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Ë 2 The system reduces EMI to maintain audio quality and efficiency
- Output short-circuit protection
- Stereo Class D operation
- No output filter required for inductor loads
- Logical selection gain
- Independent shutdown control
- Minimal external components
- "Click" sound suppression circuit
- Micropower shutdown mode
- Available in a space-saving 0.5mm pitch micro SMD package
illustrate
The LM48411 is a single-supply, high-efficiency, 2.5W/channel Class D amplifier. Enhanced emission suppression (E) of the country's LM48411 function 2 S) system, i.e. with a unique patent-pending ultra-low EMI, spread spectrum, PWM architecture that significantly reduces RF radiation while maintaining audio quality and efficiency. My E 2 The S system improves battery life, reduces the number of external components, consumes board area, system cost, and simplifies design.
The LM48411 is designed to meet the needs of mobile phones and other portable communication devices. Operating from a single 5V supply, it is capable of providing less than 10% THD+N of continuous output power from 2.5W/channel to 4Ω load Its flexible power supply requirements allow operation from 2.4V to 5.5V. The LM48411 spectrum architecture of broadband propagation reduces EMI radiated emissions due to modulator frequency.
It has a high efficiency LM48411 than traditional Class AB amplifiers. My E 2 The S system includes an advanced, patent-pending Edge Rate Control (ERC) architecture that further reduces emissions from the device's output high-frequency component while maintaining high-quality audio and high efficiency (η = 87% at V DD = 3.6 V, P O = 500MW). Fourth, the pin selectable gain option passes through GAIN0 and Gain 1 pin.
The LM48411 has a downtime mode with low power consumption. Shutdown can enable the drive shutdown pin to Logical Low (GND).
Output short-circuit protection prevents damage to equipment under fault conditions. Superior click and pop suppression eliminates sound transients when powered up/down and off. Independent left/right shutdown control maximizes power savings for mixed mono/stereo applications.
Key specifications:
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■ At 3.6V, the efficiency of 500mW is 8Ω loudspeaker
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87% (typical)
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■ At 3.6V, 100mW has an efficiency of 8Ω loudspeaker
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80% (typical)
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■ The efficiency at 5V is 8Ω 1W loudspeaker
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88% (typical)
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■ Quiescent current, 3.6V power supply
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4.2 mA (typical)
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■ The output power is at V DD = 5V R L =4Ω，THD ≤ 10％
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2.5W (typical)
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■ The output power is at V DD = 5V R L =8Ω，THD ≤ 10％
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1.5W (typical)
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■ Power off presently
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0.01μA (typical)
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■ Single supply voltage range
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2.4V to 5.5V
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apply
- mobile phone
- handheld computer
- Portable electronic devices
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