component
UC2843D
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
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UC2843D
Texas Instruments · AC-DC Controllers And Regulators · SOIC-14
UC2843D from Texas Instruments, in a SOIC-14. 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 | Error amplifier compensation pin: external compensation connects here to shape the error amplifier output, and forcing COMP to GROUND externally sets zero duty cycle; the amplifier has internal current limiting and can source and sink current. |
| 2 | NC | unconnected | Not connected (不连接) in the 14-pin SOIC package. |
| 3 | VFB | input | Inverting input of the internal error amplifier used to close the voltage feedback loop; keep the lead short and stray capacitance low for stability, and the non-inverting reference input is trimmed to 2.5 V. |
| 4 | NC | unconnected | Not connected (不连接) in the 14-pin SOIC package. |
| 5 | ISENSE | input | Primary-side current-sense input to the PWM comparator, connected to the current-sense resistor, which terminates OUTPUT conduction; the sense signal is typically 1 V at maximum and a ramp may be applied for voltage-mode or slope compensation. |
| 6 | NC | unconnected | Not connected (不连接) in the 14-pin SOIC package. |
| 7 | RT/CT | bidirectional | Oscillator timing pin: a timing resistor RT from VREF and timing capacitor CT to GROUND set fOSC = 1.72/(RT×CT); RT must never be below 5 kΩ and CT is recommended between 1 nF and 100 nF. |
| 8 | PWRGND | power_in | Power ground for the high-current output driver stage, kept separate from the analog GROUND so switching currents do not disturb the control circuitry. |
| 9 | GROUND | power_in | Signal and analog ground return for the controller; the timing capacitor must connect directly to this pin and the signal return should be kept separate from high-current gate-driver paths. |
| 10 | OUTPUT | output | Totem-pole gate driver for the external MOSFET, sourcing and sinking peak currents up to 1 A and held low while VCC is below the turn-on threshold. |
| 11 | VC | power_in | Bias supply input for the output gate driver; it must be bypassed by a capacitor at least 10 times the gate capacitance of the main switch FET. |
| 12 | VCC | power_in | Supply input for the controller, with recommended supply voltage of 12 V to 28 V and absolute maximum of 30 V from a low-impedance source; it requires a 0.1 µF bypass capacitor to GROUND placed close to the pin. |
| 13 | NC | unconnected | Not connected (不连接) in the 14-pin SOIC package. |
| 14 | VREF | power_out | 5 V reference output that also supplies the oscillator charging current; it requires a ceramic bypass of at least 0.1 µF placed close to the pin, and the recommended reference output current is -20 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14 |
| Category | Power Management (PMIC) |
| Pins | 14 |
CAD (KiCad official)
- Symbol:
UC2843D - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files:
uc2843d-etched.step/uc2843d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc2843d.step/uc2843d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (61 pp, sha256
0f875fd24cbb5fda, retrieved 2026-10-10, 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-5-5(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).