HT6872

@@ -0,0 +1,43 @@+# HT6872++**Jiaxing Heroic Elec Tech** · Audio Power OpAmps · SOP-8++HT6872 from Jiaxing Heroic Elec Tech, 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 | CTRL | input | Mode-select input. Three operating modes are chosen by DC level on CTRL: ACF mode (V_CTRL >= 1.20 V, typ. up to VDD), ACF-Off mode (0.40 V .. 0.90 V, typ. 0.80 V), and shutdown / SD mode (V_CTRL <= 0.20 V ~ VSS). Recommended external RC filter R_CTRL=10 kΩ, C_CTRL=0.1 uF (time constant >= 1 ms). |+| 2 | BYPASS | passive | Internal analog reference bypass. Nominal voltage V_BYPASS = VDD/2. Bypass to GND with C_B = 1 uF for noise filtering / PSRR. |+| 3 | IN- | input | Inverting analog audio input (differential negative). AC-coupled through C_IN = 0.1 uF and R_IN = 12 kΩ. For single-ended use, this pin is tied through matching C_IN/R_IN to ground. |+| 4 | IN+ | input | Non-inverting analog audio input (differential positive). AC-coupled through C_IN = 0.1 uF and R_IN = 12 kΩ. Voltage gain Av = 200/R_IN (approx. 23.5 dB with R_IN=12 kΩ). Source impedance Z_OUT should be <= 600 Ω. |+| 5 | OUT+ | output | Non-inverting Class-D BTL speaker output (BTL+). Directly drives a 4 Ω or 8 Ω speaker without an LC filter. Paired with OUT- as differential H-bridge output. |+| 6 | VDD | power_in | Positive supply. Recommended 2.5 V .. 6.5 V (absolute max 6.5 V). Decouple with C_S = 1 uF close to the pin. UVLO trip approx. V_UVLH=2.06 V rising, V_UVLL=1.90 V falling. |+| 7 | GND | power_in | Device ground (0 V). SOP-8 combines analog and power ground on this single pin; in the WLCSP-9 variant AGND and PGND are separated. |+| 8 | OUT- | output | Inverting Class-D BTL speaker output (BTL-). Directly drives a 4 Ω or 8 Ω speaker without an LC filter. Paired with OUT+ as differential H-bridge output. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Jiaxing Heroic Elec Tech |+| Package | SOP-8 |+| Category | Op-amp/Cmp |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `HT6872`+- 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:** [Jiaxing Heroic Elec Tech datasheet](docs/ht6872-datasheet.pdf) (12 pp, sha256 `6f4e688d6dc656d6`, retrieved 2026-08-17, tier: lcsc)+- **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/ht6872-datasheet.pdf)

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