8002B

@@ -0,0 +1,48 @@+# 8002B++**IDCHIP** · Audio Power OpAmps · SOP-8++8002B from IDCHIP, in a SOP-8. 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 | SD | input | Shutdown control input. Logic HIGH (VIH = 1.5V to VDD) puts the amplifier into shutdown (IOFF ≈ 0.6µA typical); logic LOW (VIL = 0 to 1V) enables normal operation. Must NOT be left floating - tie to GND when the shutdown feature is unused. |+| 2 | BYP | passive | Bypass pin - internal VDD/2 mid-supply reference output. Connect an external bypass capacitor (typically 1µF) from this pin to GND to filter the mid-supply bias and improve PSRR / low-frequency THD+N. |+| 3 | NC | unconnected | No connection / no internal function. Datasheet notes '芯片第3脚无功能' (pin 3 has no function). Note that the typical application schematic labels this pin 'INP' but the pin description table and features list both confirm it is NC on the 8002B variant. |+| 4 | INN | input | Inverting analog audio input. Signal is AC-coupled through Ci (typ. 0.39µF) and Ri (typ. 20kΩ). With feedback resistor Rf (typ. 68kΩ), the differential closed-loop gain is AVD = 2*(Rf/Ri). |+| 5 | VO1 | output | Bridge-tied load audio output 1. Connect one terminal of the speaker between VO1 and VO2. Output is DC-biased at VDD/2 - no output coupling capacitor required. Delivers up to 2.8W into 4Ω BTL at 5V (THD+N=10%). |+| 6 | VDD | power_in | Positive supply voltage input. Operating range 2.2V to 5.5V (absolute max 6.5V). Bypass with 10µF + 0.1µF ceramic capacitors placed close to the pin. Quiescent current IDD ≈ 10mA (no load). |+| 7 | GND | power_in | Ground / power return. Connect to system ground with a low-impedance path close to the supply bypass capacitors. |+| 8 | VO2 | output | Bridge-tied load audio output 2. Connect the other terminal of the speaker between VO2 and VO1. Internally driven 180° out of phase with VO1 by a fixed unity-gain inverter (set by two internal 20kΩ resistors), giving 4× the output power of a single-ended amplifier at the same supply. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | IDCHIP |+| Package | SOP-8 |+| Category | Op-amp/Cmp |+| Pins | 8 |++## Ordering variants++- `8002B`++## CAD (KiCad official)++- Symbol: `8002B`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [IDCHIP datasheet](docs/8002b-datasheet.pdf) (6 pp, sha256 `a33543411fb0ed59`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/8002b-datasheet.pdf)

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