onsemi NCP2817BFCCT2G

The NCP2817BFCCT2G is a dual LongPlay true ground headphone amplifier designed by onsemi, specifically tailored for portable communication devices such as mobile phones, MP3 players, and personal digital assistants. This amplifier features the NOCAP™ architecture, which eliminates the need for large output DC-blocking capacitors, thereby saving board area and component costs. It operates from a single positive supply voltage and generates symmetrical positive and negative voltages, reducing losses and increasing battery life. The device is known for its high fidelity audio performance, low noise floor, and robust protection mechanisms against short circuits, thermal overload, and pop and click noise during turn-on and turn-off transitions.

• NOCAP Output: Eliminates DC-blocking capacitors, saving board area and component costs, and preventing low-frequency response attenuation.
• LongPlay Architecture: Increases battery life by reducing quiescent current based on the load.
• High PSRR: Offers a high power supply rejection ratio of -100 dB, allowing direct connection to the battery.
• High SNR Performance: Provides a signal to noise ratio of 100 dB for high fidelity audio sound.
• Pop and Click Noise Protection: Includes circuitry to prevent pop and click noise during turn-on and turn-off transitions.
• Internal Gain: Features an internal gain setting of -1.5 V/V, with the option for external adjustable gain.
• Ultra Low Current Shutdown Mode: Reduces power consumption in shutdown mode.
• High Impedance Mode: Supports high impedance mode for various applications.
• Thermal Overload Protection: Switches off internal amplifiers when the temperature exceeds 160°C to prevent damage.
• Under Voltage Lockout (UVLO): Turns off the amplifiers when the battery voltage drops below 1.4 V.
• Pb-Free, Halogen Free/BFR Free, and RoHS Compliant: Ensures environmental compliance.

• Headset audio amplifiers for cellular phones.
• MP3 players and personal digital assistants.
• Portable media players and other portable devices.

1. What is the NCP2817BFCCT2G designed for?

   The NCP2817BFCCT2G is designed for portable communication devices such as mobile phones, MP3 players, and personal digital assistants.

2. What is the NOCAP architecture in the NCP2817BFCCT2G?

   The NOCAP architecture eliminates the need for large output DC-blocking capacitors by generating symmetrical positive and negative voltages from a single positive supply voltage.

3. What is the typical output power of the NCP2817BFCCT2G at 1.8 V with a 32 Ω load?

   The typical output power is 27 mW at 1.8 V with a 32 Ω load and THD+N of 1%.

4. What is the power supply rejection ratio (PSRR) of the NCP2817BFCCT2G?

   The PSRR is -100 dB, allowing for direct connection to the battery.

5. Does the NCP2817BFCCT2G have protection against thermal overload?

   Yes, the device includes thermal overload protection that switches off the internal amplifiers when the temperature exceeds 160°C.

6. How does the NCP2817BFCCT2G prevent pop and click noise?

   The device includes special circuitry to eliminate pop and click noise during turn-on and turn-off transitions.

7. What is the signal to noise ratio (SNR) of the NCP2817BFCCT2G?

   The SNR is 100 dB, providing high fidelity audio sound.

8. Is the NCP2817BFCCT2G environmentally compliant?

   Yes, the device is Pb-Free, Halogen Free/BFR Free, and RoHS compliant.

9. What is the typical quiescent current of the NCP2817BFCCT2G at 1.8 V?

   The typical quiescent current is 3.0 mA at 1.8 V.

10. What is the thermal shutdown temperature of the NCP2817BFCCT2G?

    The thermal shutdown temperature is 160°C.

11. What package type is the NCP2817BFCCT2G available in?

    The device is available in a 12-bump CSP (Chip Scale Package) with dimensions of 1.62 x 1.22 mm.