component
UC2845AD8TR
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownUC2845AD8TR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UC2845AD8TR 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, also peak current limiting or PWM comparator input with 80dB open-loop gain (AVOL); maximum sink current 6mA, internally unprotected. |
| 2 | FB | input | Error amplifier input for controlling power converter voltage feedback loop to achieve stability. |
| 3 | ISENSE | input | Peak current limiting or PWM comparator input; when used with current sensing resistor, error amplifier output controls cycle-by-cycle peak current limiting of power system; maximum peak current sensing signal internally clamped to 1V. |
| 4 | RT/CT | input | Internal oscillator input, programmed with external timing resistor (RT) and timing capacitor (CT); recommended capacitor 470pF to 4.7nF, timing resistor 5kΩ to 100kΩ. |
| 5 | GND | power_in | Controller signal ground. |
| 6 | OUTPUT | output | 1A totem pole gate driver output; can source/sink up to 1A of gate driver current; gate driver resistor required to limit current. |
| 7 | VCC | power_in | Gate driver bias input; requires bypass capacitor with capacitance at least 10 times larger than main switch FET gate capacitance. |
| 8 | VREF | power_in | Reference voltage output of PWM controller; must supply current not exceeding 10mA during normal operation; short-circuit protected at approximately 100mA; requires 1µF high-frequency bypass capacitor and VCC capacitor at least 10 times larger than VREF capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UC2845AD8TR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
uc2845ad8tr-etched.step/uc2845ad8tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc2845ad8tr.step/uc2845ad8tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (54 pp, sha256
1f5ad8805f414728, retrieved 2026-10-07, 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).