component
UC3844AD8TR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+45@@ -0,0 +1,45 @@+# UC3844AD8TR++**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-8++UC3844AD8TR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | COMP | output | Low impedance 1MHz internal error amplifier output that also serves as the input to the peak current limit or PWM comparator with an open-loop gain (AVOL) of 80dB and a maximum sink current of 6mA. |+| 2 | FB | input | Input to the error amplifier used to control the power supply converter output voltage feedback loop for stability. |+| 3 | ISENSE | input | Input to the peak current limit or PWM comparator that controls the cycle-by-cycle peak current limit of the power system when used with a current sense resistor, with the maximum peak current sense signal internally clamped to 1V. |+| 4 | RT/CT | input | Input to the internal oscillator programmed using external timing resistor (RT) and timing capacitor (CT) with recommended values of 470pF to 4.7nF for capacitance and 5kΩ to 100kΩ for resistor. |+| 5 | GND | power_in | Controller signal ground. |+| 6 | OUTPUT | output | 1A totem pole gate driver output that can pull in or sink up to 1A of gate driver current and requires a gate driver resistor to limit the current. |+| 7 | VCC | power_in | Gate driver bias input that must have a bias capacitor with capacitance at least 10 times larger than the main switch FET gate capacitance used in the design. |+| 8 | VREF | power_in | Reference voltage output for the PWM controller that must supply no more than 10mA of current in normal operation and is short-circuit protected at approximately 100mA, requiring a 1µF high-frequency bypass capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8 |+| Category | Power Management (PMIC) |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `UC3844AD8TR`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)+- 3D model files: `uc3844ad8tr-etched.step` / `uc3844ad8tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc3844ad8tr.step` / `uc3844ad8tr.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/uc3843a) (54 pp, sha256 `1f5ad8805f414728`, retrieved 2026-10-05, 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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (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).++[Datasheet PDF](docs/uc3844ad8tr-datasheet.pdf)
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