LM48511SQ/NOPB
Active3-W, MONO, ANALOG INPUT CLASS-D AUDIO AMP WITH INTEGRATED BOOST CONVERTER
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LM48511SQ/NOPB
Active3-W, MONO, ANALOG INPUT CLASS-D AUDIO AMP WITH INTEGRATED BOOST CONVERTER
Technical Specifications
Parameters and characteristics for this part
| Specification | LM48511SQ/NOPB |
|---|---|
| Features | Short-Circuit and Thermal Protection, Differential Inputs, Depop, Shutdown |
| Max Output Power x Channels @ Load | 6.7 W, 4 Ohm, 1 |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Type | 1-Channel (Mono) |
| Package / Case | 24-WFQFN Exposed Pad |
| Supplier Device Package | 24-WQFN (4x5) |
| Type | Class D |
| Voltage - Supply [Max] | 5.5 V |
| Voltage - Supply [Min] | 3 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 | $ 3.00 | |
| 10 | $ 2.69 | |||
| 25 | $ 2.55 | |||
| 100 | $ 2.21 | |||
| 250 | $ 2.09 | |||
| 500 | $ 1.88 | |||
| Digi-Reel® | 1 | $ 3.00 | ||
| 10 | $ 2.69 | |||
| 25 | $ 2.55 | |||
| 100 | $ 2.21 | |||
| 250 | $ 2.09 | |||
| 500 | $ 1.88 | |||
| Tape & Reel (TR) | 1000 | $ 1.59 | ||
| 2000 | $ 1.51 | |||
| 5000 | $ 1.45 | |||
| Texas Instruments | SMALL T&R | 1 | $ 2.51 | |
| 100 | $ 2.07 | |||
| 250 | $ 1.49 | |||
| 1000 | $ 1.12 | |||
Description
General part information
LM48511 Series
The LM48511 device integrates a boost converter with a high-efficiency Class D audio power amplifier to provide 3-W continuous power into an 8-Ω speaker when operating from a 5-V power supply.
When operating from a 3-V to 4-V power supply, the LM48511 can be configured to drive 1 to 2.5 W into an 8-Ω load with less than 1% distortion (THD+N). The Class D amplifier features a low-noise PWM architecture that eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design. A selectable spread spectrum modulation scheme suppresses RF emissions, further reducing the need for output filters.
The switching regulator of the LM48511 is a current-mode boost converter operating at a fixed frequency of 1 MHz. Two selectable feedback networks allow the LM48511 regulator to dynamically switch between two different output voltages, improving efficiency by optimizing the amplifier’s supply voltage based on battery voltage and output power requirements.
Documents
Technical documentation and resources
