LM4946SQ/NOPB
Active540-MW, MONO, 35-MW STEREO, ANALOG INPUT CLASS-AB AUDIO AMPLIFIER WITH I2C INTERFACE
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LM4946SQ/NOPB
Active540-MW, MONO, 35-MW STEREO, ANALOG INPUT CLASS-AB AUDIO AMPLIFIER WITH I2C INTERFACE
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | LM4946SQ/NOPB |
|---|---|
| Features | Volume Control, Shutdown, SPI, Depop, Mute, I2C, 3D, Thermal Protection |
| Max Output Power x Channels @ Load | 1.3 W, 85 mW |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Type | 1-Channel (Mono) with Stereo Headphones |
| Package / Case | 24-WFQFN Exposed Pad |
| Supplier Device Package | 24-WQFN (4x4) |
| Type | Class D |
| Voltage - Supply [Max] | 5.5 V |
| Voltage - Supply [Min] | 2.7 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 5.86 | |
| Digi-Reel® | 1 | $ 5.86 | ||
| Tape & Reel (TR) | 1000 | $ 3.10 | ||
| 2000 | $ 2.94 | |||
| Texas Instruments | LARGE T&R | 1 | $ 4.44 | |
| 100 | $ 3.62 | |||
| 250 | $ 2.85 | |||
| 1000 | $ 2.41 | |||
Description
General part information
LM4946 Series
The LM4946 is an audio power amplifier capable of delivering 540mW of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N, 35mW per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, or an output capacitor-less (OCL) configuration with identical specifications as the SE configuration, from a 3.3V power supply.
The LM4946 has three input channels: one pair for a two-channel stereo signal and the third for a differential single-channel mono input. The LM4946 features a 32-step digital volume control and eight distinct output modes. The digital volume control, 3D enhancement, and output modes (mono/SE/OCL) are programmed through a two-wire I2C or a three-wire SPI compatible interface that allows flexibility in routing and mixing audio channels.
The LM4946 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only seven external components in the OCL mode (two additional components in SE mode).
Documents
Technical documentation and resources
