component
UC2854DW
Public Made by Adomby adom
Texas Instruments AC-DC Controllers & 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
markdownUC2854DW
Texas Instruments · AC-DC Controllers & Regulators · SOIC-16-300mil
UC2854DW 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 to which all voltages are measured; VCC and VREF must be bypassed directly to GND with a 0.1-µF or larger ceramic capacitor. |
| 2 | PKLMT | input | Peak current limit with a 0-V threshold, connected to the negative voltage on the current-sense resistor and offset to GND through a resistor to VREF. |
| 3 | CAOUT | output | Current amplifier output that swings close to GND and drives an NPN emitter-follower pullup with an 8-kΩ resistor to ground, and remains active when the IC is disabled. |
| 4 | ISENSE | input | Inverting input of the current amplifier that stays functional down to and below GND but must not be taken below -0.5 V because of protection diodes to GND. |
| 5 | MULTOUT | bidirectional | Multiplier output and non-inverting current-amplifier input, a high-impedance node that must not be taken below -0.5 V. |
| 6 | IAC | input | Current input to the analog multiplier with a nominal 6-V voltage held internally, set by a resistor from the rectified line and a resistor to VREF. |
| 7 | VAOUT | output | Voltage amplifier output internally limited to approximately 5.8 V, with levels below 1 V inhibiting the multiplier output. |
| 8 | VRMS | input | RMS line voltage input that must stay between 1.5 V and 3.5 V for best control. |
| 9 | VREF | power_out | Output of an accurate 7.5-V reference capable of delivering 10 mA, internally short-circuit current limited, and held at 0 V when VCC or ENA is low. |
| 10 | ENA | input | Logic enable that must reach the 2.4 V to 2.7 V rising threshold (2.55 V typical) to enable the PWM output, reference and oscillator, and should be tied to 5 V or pulled high through 22 kΩ when unused. |
| 11 | VSENSE | input | Voltage amplifier inverting input, normally connected to the feedback network and the boost converter output through a divider. |
| 12 | RSET | input | Resistor from RSET to GND sets the oscillator charging current and limits multiplier output current to no more than 3.75 V divided by this resistor. |
| 13 | SS | input | Soft-start pin that stays at GND while the device is disabled or VCC is low, and pulls up to over 8 V through an internal 14-mA source when VCC is valid and the IC is enabled. |
| 14 | CT | input | Oscillator timing capacitor; a capacitor from CT to GND sets the PWM oscillator frequency per the datasheet equation. |
| 15 | VCC | power_in | Positive supply that must be a stable source delivering at least 20 mA above 17 V for normal operation, bypassed directly to GND, and inhibited below the undervoltage-lockout thresholds. |
| 16 | GTDRV | output | Totem-pole MOSFET gate driver output internally clamped to 15 V, which requires a series gate resistor of at least 5 Ω. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Power Supply Chip |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
UC2854DW - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files:
uc2854dw-etched.step/uc2854dw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc2854dw.step/uc2854dw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (31 pp, sha256
051276b5d66559af, retrieved 2026-10-10, 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).