Overview
The NCP2809BDMR2G, produced by onsemi, is a cost-effective stereo audio power amplifier designed to deliver high-quality audio output. This device is capable of providing 135 mW of continuous average power per channel into 16 Ω loads, making it suitable for various portable audio applications. The NCP2809B features an excellent Power Supply Rejection Ratio (PSRR) of up to 85 dB, allowing it to be directly connected to the battery without the need for an LDO. This amplifier also includes several protective features such as “pop and click” noise protection, ultra-low current shutdown mode, and thermal overload protection circuitry.
Key Specifications
| Characteristic | Conditions | Typical Value | Unit |
|---|---|---|---|
| Supply Quiescent Current (IDD) | Vin = 0 V, RL = 16 Ω, Vp = 5.0 V | 1.84 | mA |
| Output Offset Voltage (Voff) | Vp = 5.0 V | 1.0 | mV |
| Shutdown Current (ISD) | Vp = 5.0 V | 600 | nA |
| Shutdown Voltage High (VSDIH) | 1.2 | V | |
| Shutdown Voltage Low (VSDIL) | 0.4 | V | |
| Max Output Swing (Vloadpeak) | Vp = 5.0 V, RL = 16 Ω | 2.05 | V |
| Max RMS Output Power (POrms) | Vp = 5.0 V, RL = 16 Ω, THD+N < 0.1% | 131 | mW |
| Voltage Gain (G) | NCP2809A only | 0 | dB |
| Input Impedance (Zin) | NCP2809A only | 20 kΩ | |
| Positive Supply Rejection Ratio (PSRR) | Vp = 5.0 V, RL = 16 Ω, Vripple_pp = 200 mV | 85 | dB |
Key Features
- Delivers 135 mW of continuous average power per channel into 16 Ω loads from a 5.0 V power supply.
- Excellent Power Supply Rejection Ratio (PSRR) of up to 85 dB, allowing direct connection to the battery.
- “Pop and click” noise protection circuit to eliminate noise during turn-on and turn-off transitions.
- Ultra-low current shutdown mode to minimize power consumption when not in use.
- Operates from 2.2 V to 5.5 V power supply.
- Outstanding Total Harmonics Distortion + Noise (THD+N) of less than 0.01%.
- External turn-on and turn-off configuration capability.
- Thermal overload protection circuitry to prevent overheating.
- Available in Ultra Thin UDFN package (3x3 mm) and Pb-free packages.
Applications
- Cellular phones
- Portable stereo systems
- MP3 players
- Personal and notebook computers
Q & A
- What is the maximum output power of the NCP2809B?
The NCP2809B can deliver up to 131 mW of RMS output power into a 16 Ω load at 5.0 V supply voltage. - What is the typical supply quiescent current of the NCP2809B?
The typical supply quiescent current is 1.84 mA at 5.0 V supply voltage. - What is the shutdown current of the NCP2809B?
The shutdown current is typically 600 nA at 5.0 V supply voltage. - What is the Power Supply Rejection Ratio (PSRR) of the NCP2809B?
The PSRR is up to 85 dB, allowing direct connection to the battery. - Does the NCP2809B have thermal protection?
- What are the typical applications of the NCP2809B?
The NCP2809B is typically used in cellular phones, portable stereo systems, MP3 players, and personal and notebook computers.- What is the operating voltage range of the NCP2809B?
The NCP2809B operates from 2.2 V to 5.5 V.- Does the NCP2809B have “pop and click” noise protection?
- What is the input impedance of the NCP2809B?
The input impedance is 20 kΩ for the NCP2809A version.- Is the NCP2809B available in Pb-free packages?
- What are the typical applications of the NCP2809B?
