規格
| 屬性 | 價值 |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Series | Boomer® |
| Part Status | Active |
| Type | Class AB |
| Output Type | 1-Channel (Mono) |
| Max Output Powerx Channels @ Load | 3W x 1 @ 3Ohm |
| Voltage - Supply | 2.2V ~ 5.5V |
| Features | Depop, Shutdown, Thermal Protection |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Supplier Device Package | 8-WSON (4x4) |
概述
Description
The LM4991LD/NOPB is a low-noise, low-distortion audio power amplifier, primarily used in portable electronic devices. Designed by Texas Instruments, it is known for delivering high-quality audio output while maintaining energy efficiency. The device operates efficiently with a wide range of supply voltages, making it suitable for battery-powered applications.
The LM4991LD/NOPB features a bridge-tied load (BTL) configuration, which helps in maximizing output power without needing a coupling capacitor. This configuration is ideal for driving speakers directly. With its low total harmonic distortion (THD) and low quiescent current draw, it offers clear audio playback with minimal power consumption.
The IC is housed in a compact, surface-mount package, making it easy to integrate into space-constrained designs. It includes built-in features like thermal shutdown and short-circuit protection to enhance reliability and prevent damage under fault conditions. Overall, the LM4991LD/NOPB is a versatile choice for applications requiring efficient and high-quality audio amplification.
The LM4991LD/NOPB features a bridge-tied load (BTL) configuration, which helps in maximizing output power without needing a coupling capacitor. This configuration is ideal for driving speakers directly. With its low total harmonic distortion (THD) and low quiescent current draw, it offers clear audio playback with minimal power consumption.
The IC is housed in a compact, surface-mount package, making it easy to integrate into space-constrained designs. It includes built-in features like thermal shutdown and short-circuit protection to enhance reliability and prevent damage under fault conditions. Overall, the LM4991LD/NOPB is a versatile choice for applications requiring efficient and high-quality audio amplification.
Equivalent
The LM4991LD/NOPB is an audio power amplifier. Equivalent products include:
1. TPA6211A1 from Texas Instruments
2. MAX9718 from Maxim Integrated
3. PAM8403 from Diodes Incorporated
4. NJM2073 from NJR Corporation
These alternatives have similar functions and can be used in place of the LM4991LD/NOPB in various audio amplification applications. Always check the datasheets for compatibility with your specific requirements.
1. TPA6211A1 from Texas Instruments
2. MAX9718 from Maxim Integrated
3. PAM8403 from Diodes Incorporated
4. NJM2073 from NJR Corporation
These alternatives have similar functions and can be used in place of the LM4991LD/NOPB in various audio amplification applications. Always check the datasheets for compatibility with your specific requirements.
Features
The LM4991LD/NOPB is a mono bridged audio power amplifier designed for delivering output power suitable for driving speakers. Key features include:
1. Output Power: It can deliver up to 3 watts of continuous average power into a 3Ω load with less than 10% total harmonic distortion (THD) when powered by a 5V supply.
2. Low Distortion and Noise: It offers low distortion and noise levels, ensuring high-quality audio output.
3. Shutdown Mode: The device includes a shutdown function that reduces power consumption to minimal levels when the amplifier is not in use.
4. Thermal and Short-Circuit Protection: Integrated protection mechanisms help prevent damage from overheating and short circuits.
5. Micro-Power Shutdown: Consumes minimal power during shutdown mode, making it suitable for battery-powered applications.
6. Wide Operating Voltage Range: Operates effectively over a range of voltages, enhancing flexibility for various applications.
7. Small Package: Available in a compact LLP (Leadless Leadframe Package) for space-constrained applications.
These features make it suitable for various audio applications including portable devices and consumer electronics.
1. Output Power: It can deliver up to 3 watts of continuous average power into a 3Ω load with less than 10% total harmonic distortion (THD) when powered by a 5V supply.
2. Low Distortion and Noise: It offers low distortion and noise levels, ensuring high-quality audio output.
3. Shutdown Mode: The device includes a shutdown function that reduces power consumption to minimal levels when the amplifier is not in use.
4. Thermal and Short-Circuit Protection: Integrated protection mechanisms help prevent damage from overheating and short circuits.
5. Micro-Power Shutdown: Consumes minimal power during shutdown mode, making it suitable for battery-powered applications.
6. Wide Operating Voltage Range: Operates effectively over a range of voltages, enhancing flexibility for various applications.
7. Small Package: Available in a compact LLP (Leadless Leadframe Package) for space-constrained applications.
These features make it suitable for various audio applications including portable devices and consumer electronics.
Pinout
The LM4991LD/NOPB is an audio power amplifier designed for driving headphones. It typically comes in a 10-pin LLP (Leadless Leadframe Package). The key functions of the LM4991 include delivering output power to drive headphones and providing features such as low distortion, low noise, and high PSRR (Power Supply Rejection Ratio). It is designed for portable devices and applications that require efficient power management and high-quality audio output.
Manufacturer
The manufacturer of the LM4991LD/NOPB is Texas Instruments. Texas Instruments (TI) is an American technology company headquartered in Dallas, Texas. It is known for designing and manufacturing semiconductors and integrated circuits, which are used in a wide range of electronic devices and systems. TI is one of the largest semiconductor companies in the world and plays a crucial role in the electronics industry, providing components for applications in industrial, automotive, personal electronics, communication equipment, and more. The company is recognized for its innovation and contributions to advancements in analog and embedded processing products.
Application
The LM4991LD/NOPB is a mono bridged audio power amplifier designed for portable and battery-powered devices. Its primary application areas include mobile phones, tablets, and other handheld devices where space and power efficiency are critical. The amplifier is used to drive speakers in these devices, delivering clear audio output with minimal distortion. Its small footprint and low power consumption make it ideal for use in compact electronic devices where conserving battery life and maintaining performance are essential. Additionally, it can be employed in personal media players and portable gaming devices to enhance audio output quality.
Package
The LM4991LD/NOPB is packaged in a WSON (Wafer Level Small Outline No-leads) package type. This package is designed to offer a small form factor suitable for space-constrained applications.
