component
UC2854ADWTR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-16-300mil. 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
markdownUC2854ADWTR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-16-300mil
UC2854ADWTR from Texas Instruments, in a SOIC-16-300mil. 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 | GND | power_in | Ground reference for all device voltages; bypass and timing capacitors connected to GND should have leads as short and direct as possible. |
| 2 | PKLMT | input | Peak limit threshold is 0.0 V, so it connects to the negative voltage on the current sense resistor, optionally offset up to GND with a resistor to REF. |
| 3 | CAO | output | Output of the wide-bandwidth current amplifier that commands the PWM to force the correct input current; it can swing from 0.1 V to 7.5 V. |
| 4 | ISENSE | input | Inverting input of the switch current sense amplifier; it remains functional down to and below GND but should not be taken below -0.5 V because it is diode-protected to GND. |
| 5 | MOUT | bidirectional | Multiplier output and non-inverting current amplifier input; it is a high-impedance current node that should not be taken below -0.5 V, with an output range of -0.3 V to 5.0 V and IMOUT ≤ 2 × IAC. |
| 6 | IAC | input | Current input to the multiplier proportional to instantaneous line voltage, regulated to a nominal 500 mV, with the maximum current at high line limited to 250 µA for best performance. |
| 7 | VAO | input | Voltage amplifier output that forms the third input to the multiplier; it is internally clamped to 6.0 V. |
| 8 | VRMS | input | Input carrying the RMS line voltage to the multiplier, with a linear operating range of 0 V to 5.5 V and an external divider that should produce 1.5 V at low line (85 VAC). |
| 9 | VREF | power_out | Internal reference used to set the peak limit point and for various device functions; this voltage must be present for the device to operate. |
| 10 | ENA | input | Enable input: a nominal voltage above 2.65 V allows operation to begin, the device shuts off below 2.15 V nominal, and the pin is internally clamped to approximately 10 V. |
| 11 | VSENSE | input | Output feedback input into the voltage error amplifier, whose output is another input to the multiplier circuit. |
| 12 | RSET | input | A resistor from RSET to ground programs the oscillator charging current; unlike the UC3854, it has no effect on clamping the maximum multiplier output current. |
| 13 | SS | input | Soft-start pin held at GND while disabled or VCC is low, pulled up over 3 V by an internal 14-µA source when VCC is valid and the device is enabled, and quickly discharged on disable or supply dropout. |
| 14 | CT | input | Capacitor from CT to GND sets the PWM oscillator frequency. |
| 15 | VCC | power_in | Positive supply rail for the device; the absolute maximum supply voltage is 22 V. |
| 16 | GTDRV | output | PWM output as a 1.5-A peak totem-pole MOSFET gate driver; a series gate resistor of at least 5 Ω is required to prevent excessive GTDRV overshoot. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Power Management (PMIC) |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
UC2854ADWTR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files:
uc2854adwtr-etched.step/uc2854adwtr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc2854adwtr.step/uc2854adwtr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (29 pp, sha256
20dbe220bdb2dfe8, retrieved 2026-10-11, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).