LM49151TL Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments LM49151TL is a low-power audio amplifier IC designed for portable applications, delivering efficient audio output with low quiescent current, suitable for mobile devices and small speaker systems.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM49151TL?
- Low quiescent current consumption extends battery life in portable audio devices such as smartphones and tablets
- Integrated audio amplifier architecture eliminates external coupling capacitors, reducing component count and PCB area
- Designed for single-supply operation, simplifying power supply design in battery-powered consumer electronics
- Small form-factor package suits space-constrained mobile and wearable audio applications
What is LM49151TL used for?
The LM49151TL is designed for portable consumer electronics such as smartphones, tablets, and portable media players that require efficient audio amplification with minimal battery drain. Its low quiescent current and single-supply compatibility make it well suited for wearable devices and Bluetooth audio accessories where PCB area is limited. It also finds use in handheld gaming consoles and compact communication devices where a small footprint amplifier with adequate output power is needed.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Country of Origin | Country of Origin |
What are equivalent replacements for LM49151TL?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
For a smartphone audio circuit using the LM49151TL, what supply voltage range is supported?
The LM49151TL is designed for single-supply operation compatible with typical smartphone battery rails in the range of 2.5 V to 5.5 V, covering both single-cell lithium-ion batteries at 3.7 V nominal and USB-powered 5 V rails. This wide supply range lets the amplifier operate throughout a battery's discharge cycle without performance degradation, from fully charged at 4.2 V down to the cutoff near 3.0 V.
How does the LM49151TL eliminate the need for external coupling capacitors and why does that matter for PCB layout?
The LM49151TL uses a capless amplifier architecture that biases the output at mid-supply rather than near ground, removing the requirement for large electrolytic output coupling capacitors typically needed in AC-coupled designs. Eliminating these capacitors saves at least 2 to 4 component placements, reduces PCB area by several square millimeters, and avoids the low-frequency roll-off that capacitors introduce, improving bass response below 100 Hz.
In a multi-source audio mixing scenario, how many input channels can be connected to the LM49151TL simultaneously?
The LM49151TL supports multiple audio input channels through its mixer input topology, allowing at least 2 independent sources such as a microphone line and a stereo playback channel to be summed at its input stage. This simplifies designs that need to blend audio streams without external op-amp mixing networks, reducing the total component count in portable audio front-end circuits.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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