component
UCC3960D
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
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownUCC3960D
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UCC3960D 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 | SS | input | Soft-start input pin; external capacitor sets duty-cycle ramp rate at startup and provides AC ground for pulse-edge transformer secondary. |
| 2 | FB | input | Feedback input from secondary-side PWM controller; pulse amplitude must be VSS ± 2.0 V minimum (4 V peak-to-peak) for 25-200 ns duration. |
| 3 | RT | input | Timing resistor input; resistor to GND sets free-running oscillator frequency (fs = 8.0 × 10⁹ / RT) valid range 22.2-133.3 kΩ for 60-360 kHz operation. |
| 4 | REF | power_out | 5-V regulated reference output sourcing internal analog threshold circuits; maximum 10 mA external load capacity; requires 0.1-µF minimum bypass to GND. |
| 5 | CS | input | Overcurrent sense input measuring ground-referenced current sense resistor voltage; 1.0-V threshold triggers pulse-by-pulse shutdown; 1.375-V threshold initiates complete shutdown. |
| 6 | GND | power_in | Ground reference for all analog functions and power return path; must be kept clean from switching noise; bypass closely to VDD. |
| 7 | OUT | output | N-channel MOSFET gate driver output sinking 1.5 A and sourcing 0.75 A; held low during UVLO condition; requires 4 Ω minimum series gate resistance. |
| 8 | VDD | power_in | Power supply input for control circuitry and FET gate charge current; internally shunt regulated to 17.5 V clamp; requires 1.0-µF minimum bypass to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UCC3960D - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ucc3960d-etched.step/ucc3960d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc3960d.step/ucc3960d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (14 pp, sha256
b1e28c27a8a3f0c9, retrieved 2026-09-26, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).