component
Hi1243
Public Made by Adomby adom
Hichips LED Drivers, SOT-23-6. 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
markdownHi1243
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);hi1243.step/hi1243.glbare 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, 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).