LM4911LDX
Product Overview
Category: Audio Amplifier
Use: Low voltage audio amplifier for portable devices
Characteristics: Small form factor, low power consumption, high efficiency
Package: DFN-8 (3x3)
Essence: LM4911LDX is a low voltage audio amplifier designed for use in portable electronic devices. It offers high-quality audio amplification in a compact and efficient package.
Packaging/Quantity: Tape and Reel, 2500 units per reel
Specifications
- Supply Voltage: 2.7V to 5.5V
- Output Power: 1.25W at 5V, 10% THD+N, 8Ω Load
- Shutdown Current: 0.01μA (typical)
- Total Harmonic Distortion + Noise (THD+N): 0.1% (typical)
Detailed Pin Configuration
The LM4911LDX features the following pin configuration: 1. SHDN (Pin 1): Shutdown Pin 2. BYPASS (Pin 2): Bypass Capacitor Connection 3. IN- (Pin 3): Negative Differential Input 4. IN+ (Pin 4): Positive Differential Input 5. VDD (Pin 5): Power Supply 6. OUT (Pin 6): Speaker Output 7. GND (Pin 7): Ground 8. VREF (Pin 8): Reference Voltage Output
Functional Features
- Low Quiescent Current
- Shutdown Mode for Power Savings
- Thermal Shutdown Protection
- Short-Circuit and Thermal Protection
- Unity-Gain Stable
Advantages and Disadvantages
Advantages: - Small form factor suitable for portable devices - Low power consumption - High efficiency - Shutdown mode for power savings
Disadvantages: - Limited output power compared to larger amplifiers - Limited to low voltage applications
Working Principles
The LM4911LDX operates by amplifying the input audio signal and delivering it to the connected speaker or headphone. It utilizes low quiescent current and shutdown mode to minimize power consumption when not in use.
Detailed Application Field Plans
The LM4911LDX is ideal for use in various portable electronic devices such as smartphones, tablets, portable media players, and handheld gaming consoles. Its small form factor and low power consumption make it well-suited for battery-powered applications where space and energy efficiency are crucial.
Detailed and Complete Alternative Models
- LM4863: Dual 2.2W Audio Amplifier with Shutdown Mode
- LM4881: Boomer® 1.1W Audio Power Amplifier with Shutdown Mode
- LM4893: Boomer® 1.1W Audio Power Amplifier with Shutdown Mode
In conclusion, the LM4911LDX is a versatile low voltage audio amplifier designed for use in portable electronic devices. With its small form factor, low power consumption, and high efficiency, it is well-suited for a wide range of battery-powered applications.
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技術ソリューションにおける LM4911LDX の適用に関連する 10 件の一般的な質問と回答をリストします。
What is the LM4911LDX?
- The LM4911LDX is a mono, bridge-tied load (BTL) audio power amplifier designed for use in portable electronic devices.
What is the typical application of the LM4911LDX?
- The LM4911LDX is commonly used in applications such as mobile phones, PDAs, and other portable communication devices to drive the speaker or headphones.
What is the maximum output power of the LM4911LDX?
- The LM4911LDX can deliver up to 1.25W of continuous average power into an 8Ω BTL load with less than 1% total harmonic distortion (THD).
What is the supply voltage range for the LM4911LDX?
- The LM4911LDX operates from a single 2.7V to 5.5V supply, making it suitable for battery-powered applications.
Does the LM4911LDX require external components for operation?
- Yes, the LM4911LDX requires minimal external components, typically including input and output coupling capacitors, feedback resistors, and a bypass capacitor.
What is the shutdown feature of the LM4911LDX?
- The LM4911LDX includes a low-power consumption shutdown mode, which can be activated by pulling the SD pin low.
Is the LM4911LDX short-circuit protected?
- Yes, the LM4911LDX features thermal shutdown and short-circuit protection to safeguard the device and connected speakers.
What is the typical efficiency of the LM4911LDX?
- The LM4911LDX offers high efficiency, making it suitable for battery-powered applications where power consumption is critical.
Can the LM4911LDX be used in stereo applications?
- No, the LM4911LDX is a mono amplifier and is not designed for stereo applications.
What are the key advantages of using the LM4911LDX in technical solutions?
- The LM4911LDX offers small package size, low power consumption, and high efficiency, making it an ideal choice for portable and battery-powered applications requiring audio amplification.