# TL3845DR

**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-14

TL3845DR 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 | bidirectional | Error amplifier compensation pin for frequency response adjustment with external RC network. |
| 2 | NC | unconnected | Do not connect; no internal connection. |
| 3 | VFB | input | Error amplifier feedback input, 0 to 5.5V recommended operating range, referenced to GND. |
| 4 | NC | unconnected | Do not connect; no internal connection. |
| 5 | ISENSE | input | Current sense comparator input, 0 to 5.5V recommended operating range for pulse-by-pulse current limiting. |
| 6 | NC | unconnected | Do not connect; no internal connection. |
| 7 | RT/CT | bidirectional | Oscillator RC input for frequency timing, 0 to 5.5V recommended operating range. |
| 8 | POWER GROUND | power_in | Output PWM ground terminal and return path for the high-current totem-pole output stage. |
| 9 | GND | power_in | Device power supply ground terminal and reference for analog and digital signals. |
| 10 | OUTPUT | output | PWM output with high-current totem-pole driver, 0 to 30V operating range, ±1A peak current capability. |
| 11 | VC | power_in | Output PWM positive voltage supply for high-current output stage, maximum 30V, D package only. |
| 12 | VCC | power_in | Device positive voltage supply input for logic circuits, maximum 30V recommended operating voltage. |
| 13 | NC | unconnected | Do not connect; no internal connection. |
| 14 | REF | output | Internally trimmed bandgap reference output voltage (approximately 5V), maximum -20mA sink current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14 |
| Category | Power Management (PMIC) |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `TL3845DR`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `tl3845dr-etched.step` / `tl3845dr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl3845dr.step` / `tl3845dr.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/lit/ds/symlink/tl3845.pdf) (30 pp, sha256 `a83316c6a1cb9720`, retrieved 2026-10-05, tier: manufacturer)
- **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/tl3845dr-datasheet.pdf)