component

uc3843an

Public Unreviewed

by Ray

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

componentpmicuc3843an
Overview Files Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Contents

README

markdown

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)

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

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF