# UCC28950QPWRQ1

**Texas Instruments** · DC-DC Converters · TSSOP-24

UCC28950QPWRQ1 from Texas Instruments, in a TSSOP-24. 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 | VREF | power_in | 5V reference voltage output with ±1.5% accuracy and 20mA source capability. |
| 2 | EA+ | input | Error amplifier noninverting input. |
| 3 | EA- | input | Error amplifier inverting input. |
| 4 | COMP | bidirectional | Error amplifier output and input to the PWM comparator. |
| 5 | SS/EN | input | Soft-start programming input, device enable control, and hiccup mode protection circuit input. |
| 6 | DELAB | input | Dead-time delay programming input between OUTA and OUTB. |
| 7 | DELCD | input | Dead-time delay programming input between OUTC and OUTD. |
| 8 | DELEF | input | Delay-time programming input between OUTA to OUTF and OUTB to OUTE. |
| 9 | TMIN | input | Minimum duty cycle programming input in burst mode. |
| 10 | RT | input | Oscillator frequency set input and leader or follower mode setting. |
| 11 | RSUM | input | Slope compensation programming input for voltage mode or peak current mode setting. |
| 12 | DCM | input | DCM threshold setting input. |
| 13 | ADELEF | input | Delay-time programming input between primary side and secondary side switches. |
| 14 | ADEL | input | Dead-time programming input for the primary switches over CS voltage range. |
| 15 | CS | input | Current sense input for cycle-by-cycle overcurrent protection and adaptive delay functions. |
| 16 | SYNC | bidirectional | Synchronization output from leader controller and synchronization input to follower controller. |
| 17 | OUTF | output | Primary switching output with 0.2A sink and source capability. |
| 18 | OUTE | output | Primary switching output with 0.2A sink and source capability. |
| 19 | OUTD | output | Primary switching output with 0.2A sink and source capability. |
| 20 | OUTC | output | Primary switching output with 0.2A sink and source capability. |
| 21 | OUTB | output | Primary switching output with 0.2A sink and source capability. |
| 22 | OUTA | output | Primary switching output with 0.2A sink and source capability. |
| 23 | VDD | power_in | Bias supply input voltage with recommended operating range 8V to 17V. |
| 24 | GND | power_in | Ground reference node for all signals. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-24 |
| Category | Power Management (PMIC) |
| Pins | 24 |

## CAD (KiCad official)

- Symbol: `UCC28950QPWRQ1`
- Footprint: `Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm`
- 3D model: TSSOP-24 (KiCad packages3D, STEP)
- 3D model files: `ucc28950qpwrq1-etched.step` / `ucc28950qpwrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc28950qpwrq1.step` / `ucc28950qpwrq1.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/ucc28950-q1) (81 pp, sha256 `f87284109bd08aff`, 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/ucc28950qpwrq1-datasheet.pdf)