# TL1451ACPWR

**Texas Instruments** · AC-DC Controllers And Regulators · TSSOP-16

TL1451ACPWR from Texas Instruments, in a TSSOP-16. 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 | CT | passive | Timing capacitor terminal for the on-chip adjustable oscillator, used together with RT. |
| 2 | RT | passive | Timing resistor terminal for the on-chip adjustable oscillator, used together with CT. |
| 3 | 1IN+ | input | Non-inverting input of error amplifier 1, with a common-mode voltage range of 1.04 V to 1.45 V. |
| 4 | 1IN- | input | Inverting input of error amplifier 1, with a common-mode voltage range of 1.04 V to 1.45 V. |
| 5 | 1FEEDBACK | passive | Feedback/compensation node of error amplifier 1 in controller channel 1. |
| 6 | 1DTC | input | Dead-time control input of the channel 1 comparator, which has no offset unless externally altered and can set 0% to 100% dead time. |
| 7 | 1OUT | output | Uncommitted common-emitter output transistor of controller 1. |
| 8 | GND | power_in | Ground. |
| 9 | VCC | power_in | Supply voltage input; undervoltage lockout keeps the outputs off until the internal circuitry is operational. |
| 10 | 2OUT | output | Uncommitted common-emitter output transistor of controller 2. |
| 11 | 2DTC | input | Dead-time control input of the channel 2 comparator, which has no offset unless externally altered and can set 0% to 100% dead time. |
| 12 | 2FEEDBACK | passive | Feedback/compensation node of error amplifier 2 in controller channel 2. |
| 13 | 2IN- | input | Inverting input of error amplifier 2, with a common-mode voltage range of 1.04 V to 1.45 V. |
| 14 | 2IN+ | input | Non-inverting input of error amplifier 2, with a common-mode voltage range of 1.04 V to 1.45 V. |
| 15 | SCP | passive | Short-circuit protection pin for the internal short-circuit protection function. |
| 16 | REF | power_out | Output of the internal regulator providing a stable 2.5-V reference supply. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `TL1451ACPWR`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `tl1451acpwr-etched.step` / `tl1451acpwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl1451acpwr.step` / `tl1451acpwr.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/tl1451a) (38 pp, sha256 `2ff4a14b96f1efec`, retrieved 2026-10-11, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/tl1451acpwr-datasheet.pdf)