component
UCC2897ARGPR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, 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
markdownUCC2897ARGPR
Texas Instruments · AC-DC Controllers And Regulators · QFN-20-EP(4x4)
UCC2897ARGPR from Texas Instruments, in a QFN-20-EP(4x4). 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 | RON | passive | Resistor to GND that programs the charge current and switching frequency of the internal timing capacitor. |
| 2 | ROFF | passive | Resistor to GND that programs the discharge current, switching frequency, and maximum duty cycle. |
| 3 | VREF | power_out | 5V reference voltage output that supplies up to 5 mA and is bypassed to GND with 0.1µF capacitor. |
| 4 | SYNC | bidirectional | Bidirectional synchronization input where external clock must exceed free-running frequency and pulse width must remain less than (1-DMAX)×TSYNC. |
| 5 | GND | power_in | Analog ground reference connected externally to PGND at a single point only. |
| 6 | CS | input | Current sense input for peak current-mode control; cycle-by-cycle current limiting activates at approximately 0.5V threshold; requires RC filter between current-sense resistor and this pin. |
| 7 | RSLOPE | passive | Resistor to GND that programs the slope compensation current amplitude during the main switch on-time. |
| 8 | FB | input | Feedback input that brings error signal from external optocoupler or error amplifier; control voltage range 2.5V to 4.5V with values below 2.5V producing zero duty-cycle output. |
| 9 | SS/SD | input | Soft-start and shutdown input where external capacitor is charged during soft-start and discharged during shutdown. |
| 10 | PGND | power_in | Power ground return for high-current gate driver outputs OUT and AUX; should be connected with minimal impedance and loop area. |
| 11 | AUX | output | Auxiliary P-channel gate driver output providing 2A source and 2A sink current for active-clamp switching with active-low logic. |
| 12 | OUT | output | Main N-channel gate driver output providing 2A source and 2A sink current with active-high logic; 10kΩ pull-down resistor to PGND recommended. |
| 13 | PVDD | power_in | Isolated power supply input for the gate driver circuits separated from VDD internally. |
| 14 | VDD | power_in | Main power supply input requiring 1µF bypass capacitor and energy storage capacitor for proper soft-start operation. |
| 15 | LINEUV | input | Line undervoltage monitor with 1.27V threshold; hysteresis programmed by external resistor divider at LINEUV pin. |
| 16 | LINEOV | input | Line overvoltage monitor with 1.27V threshold; hysteresis programmed by external resistor divider at LINEOV pin. |
| 17 | N/C | unconnected | No internal connection; pin must be left unconnected. |
| 18 | VIN | power_in | Input power rail with internal high-voltage JFET start-up device rated to 120V maximum input voltage. |
| 19 | N/C | unconnected | No internal connection; pin must be left unconnected. |
| 20 | RDEL | passive | Resistor to GND that programs the turn-on delay between AUX and OUT gate driver outputs. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | QFN-20-EP(4x4) |
| Category | Power Management (PMIC) |
| Pins | 21 |
CAD (KiCad official)
- Symbol:
UCC2897ARGPR - Footprint:
Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm - 3D model: QFN-20-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
ucc2897argpr-etched.step/ucc2897argpr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc2897argpr.step/ucc2897argpr.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: lcsc) - 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).