component
UC3843AD8TR
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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UC3843AD8TR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UC3843AD8TR 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 with maximum sink current of 6mA and open-loop gain of 80dB. |
| 2 | FB | input | Error amplifier input for controlling power converter voltage feedback loop. |
| 3 | ISENSE | input | Peak current limit or PWM comparator input with peak current signal internally clamped to 1V. |
| 4 | RT/CT | input | Oscillator timing input programmed with external timing resistor RT (5kΩ to 100kΩ) and timing capacitor CT (470pF to 4.7nF). |
| 5 | GND | power_in | Controller signal ground. |
| 6 | OUTPUT | output | 1A totem-pole gate driver output capable of sourcing and sinking up to 1A gate driver current. |
| 7 | VCC | power_in | Positive supply bias input for gate driver requiring bypass capacitor at least 10 times larger than main switch FET gate capacitance. |
| 8 | VREF | power_in | 5V reference voltage output with maximum load current of 10mA and short-circuit protection at approximately 100mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UC3843AD8TR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
uc3843ad8tr-etched.step/uc3843ad8tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc3843ad8tr.step/uc3843ad8tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (54 pp, sha256
4e9d0f571ebfb673, retrieved 2026-10-01, 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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).
# UC3843AD8TR
**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-8
UC3843AD8TR 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 with maximum sink current of 6mA and open-loop gain of 80dB. |
| 2 | FB | input | Error amplifier input for controlling power converter voltage feedback loop. |
| 3 | ISENSE | input | Peak current limit or PWM comparator input with peak current signal internally clamped to 1V. |
| 4 | RT/CT | input | Oscillator timing input programmed with external timing resistor RT (5kΩ to 100kΩ) and timing capacitor CT (470pF to 4.7nF). |
| 5 | GND | power_in | Controller signal ground. |
| 6 | OUTPUT | output | 1A totem-pole gate driver output capable of sourcing and sinking up to 1A gate driver current. |
| 7 | VCC | power_in | Positive supply bias input for gate driver requiring bypass capacitor at least 10 times larger than main switch FET gate capacitance. |
| 8 | VREF | power_in | 5V reference voltage output with maximum load current of 10mA and short-circuit protection at approximately 100mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
## CAD (KiCad official)
- Symbol: `UC3843AD8TR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `uc3843ad8tr-etched.step` / `uc3843ad8tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc3843ad8tr.step` / `uc3843ad8tr.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/uc2845a) (54 pp, sha256 `4e9d0f571ebfb673`, retrieved 2026-10-01, 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/uc3843ad8tr-datasheet.pdf)