component
UC3854DWTR
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.
Generated by kicad-footprint-generator · KiCad file format 20260206
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UC3854DWTR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-16-300mil
UC3854DWTR 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 voltages; VCC and VREF must be bypassed directly to GND with a 0.1-µF or larger ceramic capacitor, and the timing-capacitor discharge current also returns here. |
| 2 | PKLMT | input | Peak current-limit input with a 0-V threshold, connected to the negative side of the current-sense resistor, with an absolute maximum input voltage of 5 V. |
| 3 | CAOUT | output | Current-amplifier output that swings close to GND so the PWM can force zero duty cycle, with an NPN emitter-follower pullup and an 8-kΩ resistor to ground, and it stays active when the IC is disabled. |
| 4 | ISENSE | input | Inverting input of the current amplifier that stays functional down to and below GND, and must not be taken below -0.5 V because it is diode-protected to GND. |
| 5 | MULTOUT | bidirectional | Multiplier output tied to the non-inverting current-amplifier input, a high-impedance node with a -0.3 V to 2.5 V input range that must not be taken below -0.5 V. |
| 6 | IAC | input | Line-waveform current input whose voltage is internally held at 6 V, with the line current ranging from zero to about 400 µA at the waveform peak and an absolute maximum input current of 10 mA. |
| 7 | VAOUT | output | Voltage-amplifier output internally limited to about 5.8 V, with an NPN emitter-follower pullup and an 8-kΩ resistor to ground, and output levels below 1 V inhibit the multiplier output. |
| 8 | VRMS | input | RMS line-voltage input that must stay between 1.5 V and 3.5 V for best control, with an absolute maximum input voltage of 11 V. |
| 9 | VREF | power_in | Accurate 7.5-V reference output that can deliver 10 mA to peripheral circuitry, is short-circuit current limited, is held at 0 V when VCC or ENA is low, and should be bypassed with 0.1 µF or larger. |
| 10 | ENA | input | Logic enable input with a rising threshold of 2.4 V to 2.7 V (2.55 V typical) and about 0.25 V typical hysteresis, internally clamped to about 14 V, and it must be tied to 5 V or pulled high through 22 kΩ when unused. |
| 11 | VSENSE | input | Inverting input of the voltage amplifier, normally connected to the feedback network from the boost output, with a 7.5-V threshold, an absolute maximum input voltage of 11 V, and a bias current limited to ±500 nA. |
| 12 | RSET | input | Resistor to GND that sets the oscillator charging current and the maximum multiplier output, where multiplier output current does not exceed 3.75 V divided by the RSET resistance, with an absolute maximum input current of 10 mA. |
| 13 | SS | input | Soft-start pin held at GND while the device is disabled or VCC is low, pulled up to over 8 V by an internal current source once VCC is valid and the IC is enabled, and quickly discharged to ground on disable or supply dropout. |
| 14 | CT | input | Oscillator timing capacitor connected from CT to GND that sets the PWM oscillator frequency together with RSET, calculated per Equation 1 in the datasheet. |
| 15 | VCC | power_in | Positive supply with a recommended range of 10 V to 20 V and an absolute maximum of 35 V; it must exceed the 16 V typical turn-on threshold to start switching and stay above the 10 V typical turn-off threshold, and must deliver at least 20 mA. |
| 16 | GTDRV | output | Totem-pole MOSFET gate-driver output internally clamped to 15 V, which should use a series gate resistor of at least 5 Ω, with absolute maximum gate-driver current of 1.5 A peak at 50% duty cycle and 0.5 A continuous. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Power Management (PMIC) |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
UC3854DWTR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files:
uc3854dwtr-etched.step/uc3854dwtr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc3854dwtr.step/uc3854dwtr.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 2026-10-07, 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).