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Hi1243

Public Made by Adom

by adom

Hichips LED Drivers, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Hi1243

Hichips · LED Drivers · SOT-23-6

Hi1243 from Hichips, in a SOT-23-6. 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 VIN power_in Chip supply input with an operating range of 3.0 to 40 V, and an absolute maximum of -0.3 to 40 V; a surge-limiting resistor R0 is recommended above 12 V, and a 20-30 V Zener to GND is suggested when the supply exceeds 36 V.
2 TEST unconnected Test pin that must be left floating (悬空) in the application.
3 CS input Output current sense pin; the output current is set by the CS resistor as I_OUT = 0.143 V / R_CS, with CS voltage rated -0.3 to 6.0 V.
4 D passive Drain of the internal MOS that carries the LED constant-current output; for the Hi1243 variant the drain voltage rating is -0.3 to 30 V.
5 DIM input PWM dimming input with an internal 100 uA pull-up that defaults high when floating, supporting dimming above 20 kHz at better than 1000:1 resolution, with PWM input rated -0.3 to 6.0 V.
6 GND power_in Chip ground reference; the chip enters sleep mode if PWM is held low to GND for more than 120 ms.

Key specifications

Parameter Value
Manufacturer Hichips
Package SOT-23-6
Category Nixie Tube Driver/LED Driver
Pins 6

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
VD constant-current output port withstand voltage (Hi1243) VD -0.3 30 V Hi1243 variant; printed as range -0.3~30 3
VIN chip operating supply voltage VIN -0.3 40 V Printed as range -0.3~40 3
VDim PWM input voltage VDim -0.3 6 V Printed as range -0.3~6.0 3
VCS CS port withstand voltage VCS -0.3 6 V Printed as range -0.3~6.0 3
Output current IOUT 300 mA 4
VIN supply voltage range VIN 3 40 V 4
ESD HBM (human body model) VESD 2 KV HBM; printed as >2 KV 3
Thermal resistance junction to ambient RθJA 210 ℃/W PN junction to ambient; single value printed in range column 3
Maximum allowable power dissipation PD 0.35 W Note 2: PD=(TJMAX-TA)/RθJA or the limit value, whichever is lower 3
Storage temperature TSTG -40 150 ℃ Printed as range -40~150 3
Operating junction temperature TJ -40 125 ℃ Printed as range -40~125 3

CAD (KiCad official)

  • Symbol: Hi1243
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: hi1243-etched.step / hi1243-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hi1243.step / hi1243.glb are the bare package body.

Provenance

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

  • Datasheet: Hichips datasheet (8 pp, sha256 27aca28cedfa19ec, retrieved 2026-10-19, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF