lm4875mx

@@ -33,5 +33,79 @@   "author": {     "name": "Ray",     "email": "[email protected]"+  },+  "component": {+    "mpn": "LM4875MX",+    "manufacturer": "Texas Instruments",+    "package": "SOIC-8",+    "pin_count": 8,+    "category": "Audio Power OpAmps",+    "datasheet": "https://www.ti.com/lit/ds/symlink/lm4875mx.pdf",+    "parts": {+      "symbol": "lm4875mx.kicad_sym",+      "footprint": "lm4875mx.kicad_mod",+      "model_3d": "lm4875mx-etched.glb",+      "model_3d_plain": "lm4875mx.glb",+      "model_3d_step": "lm4875mx-etched.step",+      "model_3d_step_plain": "lm4875mx.step",+      "lbr": "lm4875mx.lbr"+    },+    "pins": [+      {+        "number": "1",+        "name": "VO1",+        "type": "output",+        "description": "Amp1 (non-inverting bridge half) audio output. Drives one side of the bridged 8 Ω speaker and, in headphone mode, drives the single-ended headphone load referenced to GND. Biased at VDD/2 in bridge mode."+      },+      {+        "number": "2",+        "name": "BYPASS",+        "type": "passive",+        "description": "Half-supply (VDD/2) bias-node bypass pin. A capacitor CB (typically 1.0 µF) from this pin to GND filters the internal bias reference and sets the click/pop turn-on time (~280 ms with 1.0 µF). Larger CB improves PSRR."+      },+      {+        "number": "3",+        "name": "HP-Sense",+        "type": "input",+        "description": "Headphone-sense control input. VIL ≤ 0.8 V places the amplifier in bridged speaker mode; VIH ≥ 4 V (up to VCC) mutes Amp2, disconnects the bridge load, and enables single-ended headphone drive from VO1. Typically driven by a headphone-jack switch contact through a resistor divider."+      },+      {+        "number": "4",+        "name": "DC Vol/SD",+        "type": "input",+        "description": "DC voltage volume control and shutdown pin. Input range GND to VDD sets gain from about −72 dB (VPIN4 ≤ 0.9 V, 20% VDD) up to +20 dB (VPIN4 ≥ 4.0 V, 80% VDD). Applying <300 mV activates the 0.7 µA micropower shutdown; 500 mV-1 V asserts mute (~75 dB attenuation)."+      },+      {+        "number": "5",+        "name": "-IN",+        "type": "input",+        "description": "Inverting audio input to Amp1. Drive through an input coupling capacitor Ci (blocks DC and forms a highpass with the internal 10 kΩ-110 kΩ input resistor RIN, which varies with the DC Vol/SD setting). Amp1's closed-loop gain is set by the DC Vol/SD voltage."+      },+      {+        "number": "6",+        "name": "GND",+        "type": "power_in",+        "description": "Device ground / analog reference. All voltages in the datasheet are measured with respect to this pin."+      },+      {+        "number": "7",+        "name": "VDD",+        "type": "power_in",+        "description": "Positive supply rail. Operating range 2.7 V to 5.5 V (absolute max 6.0 V). Quiescent current 4 mA typ (bridge mode) / 3.5 mA typ (headphone mode). Bypass close to the pin with 10 µF and 0.1 µF capacitors to GND for low noise and high PSRR."+      },+      {+        "number": "8",+        "name": "VO2",+        "type": "output",+        "description": "Amp2 (inverting bridge half) audio output. Drives the second side of the bridge-mode 8 Ω speaker with a signal 180° out of phase with VO1 (fixed −1 gain vs Amp1). Muted (Amp2 off) when HP-Sense is driven high."+      }+    ],+    "provenance": {+      "rebuilt": "component block rebuilt 2026-10-05 from this page's own README pinout table and .kicad_sym (pins cross-checked), no re-extraction"+    },+    "viewers": {+      "symbol": "viewers/symbol.html",+      "footprint": "viewers/footprint.html"+    }   }-}\ No newline at end of file+}