Overview
The LM4752TS/NOPB is a stereo audio power amplifier produced by Texas Instruments. This device is designed to deliver high-quality audio output with minimal external component requirements. It is capable of driving 4Ω and 8Ω loads, making it versatile for various audio applications. The LM4752 operates on a single supply voltage ranging from 9V to 32V and is packaged in a compact 7-pin TO-263 (KTW) package. This amplifier is particularly suited for compact stereo systems, TV audio, and multimedia speakers due to its high output power and low cost-per-watt performance.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Output Power at 10% THD+N | 11 W (typ) per channel into 4Ω, 7 W (typ) per channel into 8Ω | VCC = 24V, 1kHz |
| Closed Loop Gain | 34 dB (typ) | RL = 8Ω |
| Supply Voltage Range | 9V to 32V | |
| Operating Temperature Range | -40°C to 85°C | |
| Package Type | TO-263 (KTW), 7 pins | |
| Thermal Shutdown Protection | Yes | |
| Input Impedance | 83 kΩ (typ) | |
| Power Bandwidth | 65 kHz (typ) at Po = 2.5W, RL = 8Ω |
Key Features
- Delivers 11W per channel into 4Ω or 7W per channel into 8Ω at 10% THD+N with a single 24V supply.
- Internal gain resistors with a gain of 34 dB.
- Single supply operation with a wide supply voltage range of 9V to 32V.
- Internal current limiting and thermal protection.
- Compact 7-lead TO-263 package.
- Low external component count.
- Thermal shutdown protection.
- Simple mute function implementation with a few external components.
Applications
- Compact stereos.
- Stereo TVs.
- Mini component stereos.
- Multimedia speakers.
Q & A
- What is the maximum output power of the LM4752TS/NOPB? The LM4752TS/NOPB can deliver up to 11W per channel into a 4Ω load or 7W per channel into an 8Ω load at 10% THD+N with a 24V supply.
- What is the typical closed loop gain of the LM4752TS/NOPB? The typical closed loop gain is 34 dB.
- What is the operating temperature range of the LM4752TS/NOPB? The operating temperature range is -40°C to 85°C.
- What type of package does the LM4752TS/NOPB come in? The LM4752TS/NOPB comes in a 7-pin TO-263 (KTW) package.
- Does the LM4752TS/NOPB have thermal shutdown protection? Yes, it has internal thermal shutdown protection.
- Can the LM4752TS/NOPB be used in bridge-mode configuration? Yes, although it is designed for single-ended operation, it can be used in bridge-mode with an external inverting amplifier.
- What is the input impedance of the LM4752TS/NOPB? The input impedance is typically 83 kΩ.
- How does the LM4752TS/NOPB prevent oscillations? The inputs should be AC terminated at all times to prevent high frequency oscillations; if necessary, they should be terminated to ground with a resistance of 50 kΩ or less.
- What is the power bandwidth of the LM4752TS/NOPB? The power bandwidth is typically 65 kHz at Po = 2.5W, RL = 8Ω.
- Can the LM4752TS/NOPB be used with a wide range of supply voltages? Yes, it operates with a supply voltage range of 9V to 32V.
