component

uc3843an

Public Made by Adom

by adom

XBLW AC-DC Controllers and Regulators, DIP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs uc3843an: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
viewers Publish 0.1.0 · Ray 28d ago
package.json Publish 0.1.0 · Ray 28d ago
page.json uc3843an: distributor numbers (LCSC map, Component Ocean) · Ray 1d ago
README.md uc3843an: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 14d ago
uc3843an-etched.fit.json uc3843an: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
uc3843an-etched.glb uc3843an: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
uc3843an-etched.step uc3843an: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
uc3843an.glb Publish 0.1.0 · Ray 28d ago
uc3843an.kicad_mod Publish 0.1.0 · Ray 28d ago
uc3843an.kicad_sym Publish 0.1.0 · Ray 28d ago
uc3843an.lbr Publish 0.1.0 · Ray 28d ago
uc3843an.step Publish 0.1.0 · Ray 28d ago

UC3843AN

XBLW · AC-DC Controllers and Regulators · DIP-8

UC3843AN from XBLW, in a DIP-8. 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 COMP output Error amplifier compensation pin. Connect external compensation components to this pin to modify the error amplifier output.
2 VFB input Voltage feedback pin. Inverting input to the internal error amplifier. VFB is used to control the power converter voltage-feedback loop for stability.
3 ISENSE input Primary-side current sense pin. Connect to current sensing resistor. The PWM uses this signal to terminate the OUTPUT switch conduction.
4 RT/CT passive Oscillator timing pin. Connect timing resistor RRT to VREF and timing capacitor CCT to GROUND from this pin to set the switching frequency and maximum output ratio. Max frequency up to 500 kHz.
5 GND power_in Ground reference for the device.
6 OUTPUT output Gate drive output for the external MOSFET. Peak currents of up to 1 A are sourced and sunk by this pin.
7 VCC power_in Positive power supply input to the device. Absolute maximum 30 V; typical operating around 12-25 V. UVLO startup threshold ~8.4 V.
8 VREF power_out 5 V reference voltage output. Used to provide charging current to the oscillator timing capacitor through the timing resistor.

Key specifications

Parameter Value
Manufacturer XBLW
Package DIP-8
Category PMIC
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • UC3843AN
  • UC3843ANBDTR

CAD (KiCad official)

  • Symbol: UC3843AN
  • Footprint: Package_DIP:DIP-8_W7.62mm
  • 3D model: DIP-8 (KiCad packages3D, STEP)
  • 3D model files: uc3843an-etched.step / uc3843an-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uc3843an.step / uc3843an.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: XBLW datasheet (11 pp, sha256 a963465d88941e22, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF