component
UC3853DTR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-8. 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
markdownUC3853DTR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UC3853DTR from Texas Instruments, in a SOIC-8. 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 | IAC | input | AC waveform input to the multiplier, a low-impedance input nominally at 2V that accepts a current proportional to input voltage (resistor sized for 500mA at maximum line; absolute maximum input current 1mA). |
| 2 | VCC | power_in | Input supply voltage and RMS line-voltage signal to the squarer, operating range 12V to 40V, bypassed with at least a 0.1µF ceramic capacitor. |
| 3 | OUT | output | Gate driver output with 15V clamp for the external power MOSFET, use at least 5 ohm series gate resistor, 0.125A continuous and 0.5A peak drive current. |
| 4 | GND | power_in | Ground reference for all voltages, with the VCC bypass capacitor connected as close to this pin as possible. |
| 5 | FB | input | Voltage amplifier inverting input, overvoltage comparator input and sync input, regulated to a nominal 3V, trips OVP at 5% above nominal, maximum input voltage 5V. |
| 6 | VCOMP | output | Voltage loop transconductance error amplifier output, compensated with impedance to GND, multiplier output current is zero below 1.5V, maximum voltage 6.2V. |
| 7 | IMO | bidirectional | Multiplier output current and current amplifier inverting input summing node, avoid going below -0.5V, input resistance should be 3.9k, maximum output current -2mA. |
| 8 | ICOMP | output | Current loop error amplifier output with 150µA current source class A stage, compensated by impedance between ICOMP and IMO, sinks 20mA maximum and 7.2V maximum voltage. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UC3853DTR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
uc3853dtr-etched.step/uc3853dtr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc3853dtr.step/uc3853dtr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (11 pp, sha256
b2507c5b7940ba26, retrieved 2026-10-11, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).