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Product Detailed Parameters
- Description：IC AMP AB STEREO 135MW 10MICRO
- Series：NOCAP™
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT),Bulk
- Type：Class AB
- Output Type：Headphones, 2-Channel (Stereo)
- Max Output Power x Channels @ Load：135mW x 2 @ 16Ohm
- Voltage - Supply：2.2V ~ 5.5V
- Features：Depop, Short-Circuit and Thermal Protection, Shutdown
- Mounting Type：Surface Mount
- Supplier Device Package：10-Micro
- Package / Case：10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Operating Temperature：-40°C ~ 85°C (TA)
- Grade：-
- Qualification：-
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Overview
The NCP2809ADMR2G is a stereo audio power amplifier from the NOCAP/C0116 series, delivering 135 mW continuous average power per channel into 16-ohm loads. It operates on a single supply voltage ranging from 2.2 V to 5.5 V and features an internal gain of 0 dB. The device utilizes a Micro10 package (CASE 846B1) and includes thermal overload protection, current limit circuitry, and pop-and-click noise suppression.
Feature Summary
- Eliminates the need for bootstrap capacitors or snubber networks, optimizing suitability for low-power portable systems.
- Provides excellent power supply rejection ratio, allowing direct connection to battery sources without requiring an LDO.
- Incorporates virtual ground circuitry that enables NOCAP configurations by connecting directly to the headset middle point.
Applications
- Cellular phones
- Portable stereo devices
- MP3 players
- Personal and notebook computers
Procurement Notes
Verify the specific ordering suffix 'DMR2' against the manufacturer's official documentation to confirm the exact tape and reel packaging configuration. Ensure compatibility with the Micro10 surface-mount footprint during procurement planning.
Selection Notes
Select this component when a fixed 0 dB internal gain is required for the audio signal path. It is suitable for designs prioritizing minimal external component count and direct battery operation due to high PSRR capabilities.
Part Context
This part belongs to the NCP2809 family of cost-effective stereo headphone amplifiers. The 'A' designation indicates a fixed 0 dB internal gain architecture, distinguishing it from the 'B' variant which allows for external gain setting via resistors.
Replacement Considerations
NCP2809BDMR2G is a functional alternative within the same series, offering adjustable external gain instead of fixed internal gain.
FAQ
How does the NCP2809 handle startup transients?
It includes a dedicated pop and click noise protection circuit that slowly establishes gain to eliminate audible noises during turn-on transitions.
What is the function of the REF_I pin in NOCAP mode?
The REF_I pin provides the virtual ground reference for the stereo headset and should be connected as close as possible to the headset ground to improve crosstalk performance.
