component
UCC2897APWR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, TSSOP-20. Datasheet-verified pinout, 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
markdownUCC2897APWR
Texas Instruments · AC-DC Controllers And Regulators · TSSOP-20
UCC2897APWR from Texas Instruments, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Connect to input-power rail (maximum 120 V) to provide high-voltage JFET start-up current until bootstrap bias becomes available. |
| 2 | N/C | unconnected | No internal connection; leave floating. |
| 3 | RDEL | input | Program turn-on delay for gate-drive outputs via resistor to GND; delay time follows equation tDEL = 11.1×10⁻¹² × RDEL + 15×10⁻⁹ seconds. |
| 4 | RON | input | Program internal timing-capacitor charge current via resistor to GND; determines on-time and switching frequency along with ROFF. |
| 5 | ROFF | input | Program internal timing-capacitor discharge current via resistor to GND; determines off-time and maximum duty cycle along with RON. |
| 6 | VREF | power_out | 5-V regulated reference voltage output (up to 5 mA); bypass to GND with 0.1-µF capacitor for stability and noise filtering. |
| 7 | SYNC | bidirectional | Bidirectional synchronization input/output; accepts external clock synchronization signal or outputs internal oscillator timing reference when standalone. |
| 8 | GND | power_in | Analog ground reference for control circuitry; connect directly to PGND via single short trace to minimize control noise coupling. |
| 9 | CS | input | Peak current-sense input for current-mode control and cycle-by-cycle current limiting at 0.5-V threshold; requires RC filter between current-sense resistor and pin. |
| 10 | RSLOPE | input | Program slope-compensation current amplitude via resistor to GND; compensation slope is proportional to internal timing-capacitor waveform during OUT high periods. |
| 11 | FB | input | Error signal feedback from external optocoupler or error amplifier with control range 2.5 V (minimum duty) to 4.5 V (maximum duty). |
| 12 | SS/SD | input | Soft-start and shutdown capacitor pin; charged from 2.5 V to 4.5 V by internal current source during soft-start and discharged to 0.5 V for shutdown. |
| 13 | PGND | power_in | Power ground current return for high-current drivers OUT and AUX; must connect to GND pin with single short trace. |
| 14 | AUX | output | Gate driver output for auxiliary P-channel clamp MOSFET (active-low logic) with 2-A source and 2-A sink current capability. |
| 15 | OUT | output | Gate driver output for main N-channel MOSFET (active-high logic) with 2-A source and 2-A sink current capability; connect 10-kΩ resistor to PGND. |
| 16 | PVDD | power_in | Supply for output drivers; bypass to PGND with 10-µF capacitor at device. |
| 17 | VDD | power_in | Primary power supply (8.5 V to 16 V) for gate drivers and 5-V bias regulator; bypass to PGND with 1-µF capacitor at device. |
| 18 | LINEUV | input | Line undervoltage monitor input (1.27-V threshold, programmable hysteresis) for bulk voltage monitoring via external resistor divider. |
| 19 | LINEOV | input | Line overvoltage monitor input (1.27-V threshold, programmable hysteresis) that disables outputs immediately upon threshold crossing. |
| 20 | N/C | unconnected | No internal connection; leave floating. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Power Management (PMIC) |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
UCC2897APWR - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
ucc2897apwr-etched.step/ucc2897apwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc2897apwr.step/ucc2897apwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (50 pp, sha256
fb294981fe94b45c, retrieved 2026-09-23, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).