component
LM48511SQX
Public Made by Adomby adom
Texas Instruments Audio Amplifiers, WQFN-24-EP(4x5). Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM48511SQX
Texas Instruments · Audio Amplifiers · WQFN-24-EP(4x5)
LM48511SQX from Texas Instruments, in a WQFN-24-EP(4x5). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | FB_SEL | input | Regulator feedback select input; connect to VDD to select feedback network connected to FB_GND1, or connect to GND to select feedback network connected to FB_GND0. |
| 2 | SW | passive | Drain of the internal FET switch for boost converter switching stage. |
| 3 | SW | passive | Drain of the internal FET switch for boost converter switching stage. |
| 4 | SOFTSTART | passive | Soft-start capacitor connection point for limiting transient current at start-up. |
| 5 | SD_AMP | input | Amplifier active-low shutdown input; connect to VDD for normal operation or to GND to disable amplifier. |
| 6 | SS/FF | input | Modulation mode select input; connect to VDD for spread spectrum mode (SS) or to GND for fixed frequency mode (FF). |
| 7 | GND | power_in | Signal ground for analog circuits and Class D amplifier. |
| 8 | LS+ | output | Amplifier noninverting output; supplies current to positive terminal of speaker load. |
| 9 | LSGND | power_in | Amplifier H-Bridge ground, part of the output stage power return path. |
| 10 | PV1 | power_in | Amplifier H-Bridge power supply input; must be connected to V1 for proper operation. |
| 11 | LSGND | power_in | Amplifier H-Bridge ground, part of the output stage power return path. |
| 12 | LS- | output | Amplifier inverting output; supplies current to negative terminal of speaker load. |
| 13 | V1 | power_in | Amplifier supply voltage node; connect to PV1 from boost converter output. |
| 14 | VGO+ | output | Amplifier noninverting gain output stage signal for feedback resistor network. |
| 15 | IN- | input | Amplifier inverting input for differential audio signal; input impedance determined by external input resistors. |
| 16 | IN+ | input | Amplifier noninverting input for differential audio signal; input impedance determined by external input resistors. |
| 17 | VGO- | output | Amplifier inverting gain output stage signal for feedback resistor network. |
| 18 | VDD | power_in | Power supply input, operating range 3 V to 5.5 V with 9 V absolute maximum rating. |
| 19 | FB | input | Regulator feedback input connected to midpoint of external voltage divider network to set boost output voltage. |
| 20 | FB_GND1 | power_in | Ground return for R2 resistor in voltage divider network; selected when FB_SEL = VDD. |
| 21 | FB_GND0 | power_in | Ground return for R1 resistor in voltage divider network; selected when FB_SEL = GND. |
| 22 | REGGND | power_in | Power ground for boost converter switching stage and regulator circuits. |
| 23 | REGGND | power_in | Power ground for boost converter switching stage and regulator circuits. |
| 24 | SD_BOOST | input | Regulator active-low shutdown input; connect to VDD for normal operation or to GND to disable boost regulator. |
| 25 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-24-EP(4x5) |
| Category | Amplifiers/Comparators |
| Pins | 25 |
CAD (KiCad official)
- Symbol:
LM48511SQX - Footprint:
Package_DFN_QFN:QFN-24-1EP_4x5mm_P0.5mm_EP2.65x3.65mm - 3D model: WQFN-24-EP(4x5) (KiCad packages3D, STEP)
- 3D model files:
lm48511sqx-etched.step/lm48511sqx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm48511sqx.step/lm48511sqx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (28 pp, sha256
47fbd38c5dc884f1, retrieved 2026-09-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).