component
UCC2895DWTR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers & Regulators, SOIC-20-300mil. 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
markdownUCC2895DWTR
Texas Instruments · AC-DC Controllers & Regulators · SOIC-20-300mil
UCC2895DWTR from Texas Instruments, in a SOIC-20-300mil. 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 | EAN | input | Inverting input to the error amplifier; keep below 3.6 V for proper operation. |
| 2 | EAOUT | bidirectional | Error amplifier output; internally connected to the non-inverting input of the PWM comparator and no-load comparator, internally clamped to soft-start voltage. |
| 3 | RAMP | input | Inverting input of the PWM comparator; receives either the CT waveform in voltage and average current-mode control, or current signal plus slope compensation in peak current-mode control. |
| 4 | REF | power_out | 5-V ±1.2% precision voltage reference supplying up to 5 mA to external loads; bypass with 0.1 μF low ESR low ESL capacitor to ground, do not use more than 4.7 μF total capacitance. |
| 5 | GND | power_in | Chip ground for all circuits except the output stages. |
| 6 | SYNC | bidirectional | Oscillator synchronization pin; bidirectional, can be used as output clock or input to override internal oscillator for synchronization of multiple power supplies. |
| 7 | CT | input | Oscillator timing capacitor for programming the switching frequency; the UCC2895 oscillator charges CT via programmed current, range 100 to 880 pF. |
| 8 | RT | input | Oscillator timing resistor for programming the switching frequency; current programmed by RT, range 40 kΩ to 120 kΩ. |
| 9 | DELAB | input | Delay-programming between complementary-outputs pin; programs the dead time between switching of output A and output B. |
| 10 | DELCD | input | Delay-programming between complementary-outputs pin; programs the dead time between switching of output C and output D. |
| 11 | ADS | input | Adaptive-delay-set pin; sets the ratio between maximum and minimum programmed output delay dead time, must be limited to 0 V to 2.5 V and less than or equal to CS. |
| 12 | CS | input | Current sense input for cycle-by-cycle current limiting and over-current comparator; connects to inverting input of current-sense comparator and non-inverting input of overcurrent comparator. |
| 13 | OUTD | output | Complementary MOS driver output, 100 mA rated; one of four outputs optimized to drive FET driver circuits or gate drive transformers. |
| 14 | OUTC | output | Complementary MOS driver output, 100 mA rated; phase shifted with respect to OUTA, drives second half-bridge circuit. |
| 15 | VDD | power_in | Power supply input pin; must be bypassed with minimum 1 μF low ESR low ESL capacitor to ground, addition of 10 μF low ESR low ESL between VDD and PGND recommended, operating range 10 to 16.5 V. |
| 16 | PGND | power_in | Output stage ground connection for high-current output stages; must be electrically tied to GND, board traces must be low impedance. |
| 17 | OUTB | output | Complementary MOS driver output, 100 mA rated; fully complementary with OUTA at nominal 50% duty cycle, intended to drive one half-bridge circuit. |
| 18 | OUTA | output | Complementary MOS driver output, 100 mA rated; one of four outputs optimized to drive FET driver circuits or gate drive transformers. |
| 19 | SS/DISB | input | Soft-start and disable pin combining two independent functions; controls soft-start time and chip enable/disable, sources/sinks current set by IRT. |
| 20 | EAP | input | Non-inverting input to the error amplifier; keep below 3.6 V for proper operation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-20-300mil |
| Category | Power Supply Chip |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
UCC2895DWTR - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files:
ucc2895dwtr-etched.step/ucc2895dwtr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc2895dwtr.step/ucc2895dwtr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (61 pp, sha256
839591a78c6304d9, retrieved 2026-09-22, 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 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).