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Hi1246
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Hichips LED Drivers, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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Hi1246
Hichips · LED Drivers · SOT-23-6
Hi1246 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 internal high-voltage LDO, operating from 3.0 V to 40 V (absolute maximum -0.3 to 40 V); a series R0 (1 kΩ above 12 V) and a 20-30 V zener are recommended for surge and over-voltage protection above 36 V. |
| 2 | TEST | unconnected | Test pin that must be left floating (not connected) in the application. |
| 3 | CS | input | Output current sense pin; the LED current is set by the external CS resistor as I_OUT = 0.143 V / R_CS, with a CS pin voltage rating of -0.3 to 6.0 V. |
| 4 | D | output | Drain of the internal MOSFET that sinks the constant LED current, rated for a drain voltage of -0.3 to 60 V for the Hi1246 variant. |
| 5 | DIM | input | PWM dimming input with an internal 100 µA pull-up (default high when floating), supporting 1000:1 dimming at 20 kHz and above, with a PWM input voltage rating of -0.3 to 6.0 V; the chip enters sleep mode if PWM is held low for more than 120 ms. |
| 6 | GND | power_in | Chip ground reference pin. |
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 |
|---|---|---|---|---|---|---|---|
| VIN supply voltage range | VIN | 3 | 40 | V | 4 | ||
| Output current | IOUT | 300 | mA | 4 | |||
| VIN supply voltage (absolute maximum) | VIN | -0.3 | 40 | V | 3 | ||
| Constant-current output port withstand voltage (Hi1246) | VD | -0.3 | 60 | V | 3 | ||
| PWM input voltage | VDim | -0.3 | 6 | V | 3 | ||
| CS port withstand voltage | VCS | -0.3 | 6 | V | 3 | ||
| Maximum allowable power dissipation | PD | 0.35 | W | see note 2: limited by TJMAX, RθJA and TA | 3 | ||
| Storage temperature | TSTG | -40 | 150 | ℃ | 3 | ||
| Operating junction temperature | TJ | -40 | 125 | ℃ | 3 | ||
| ESD HBM rating | VESD | 2 | KV | HBM; datasheet prints '>2 KV' | 3 | ||
| Junction-to-ambient thermal resistance | RθJA | 210 | ℃/W | 3 |
CAD (KiCad official)
- Symbol:
Hi1246 - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
hi1246-etched.step/hi1246-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);hi1246.step/hi1246.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Hichips datasheet (8 pp, sha256
27aca28cedfa19ec, retrieved 2026-10-18, 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).
# Hi1246
**Hichips** · LED Drivers · SOT-23-6
Hi1246 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 internal high-voltage LDO, operating from 3.0 V to 40 V (absolute maximum -0.3 to 40 V); a series R0 (1 kΩ above 12 V) and a 20-30 V zener are recommended for surge and over-voltage protection above 36 V. |
| 2 | TEST | unconnected | Test pin that must be left floating (not connected) in the application. |
| 3 | CS | input | Output current sense pin; the LED current is set by the external CS resistor as I_OUT = 0.143 V / R_CS, with a CS pin voltage rating of -0.3 to 6.0 V. |
| 4 | D | output | Drain of the internal MOSFET that sinks the constant LED current, rated for a drain voltage of -0.3 to 60 V for the Hi1246 variant. |
| 5 | DIM | input | PWM dimming input with an internal 100 µA pull-up (default high when floating), supporting 1000:1 dimming at 20 kHz and above, with a PWM input voltage rating of -0.3 to 6.0 V; the chip enters sleep mode if PWM is held low for more than 120 ms. |
| 6 | GND | power_in | Chip ground reference pin. |
## 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 |
|---|---|---|---|---|---|---|---|
| VIN supply voltage range | VIN | 3 | | 40 | V | | 4 |
| Output current | IOUT | | | 300 | mA | | 4 |
| VIN supply voltage (absolute maximum) | VIN | -0.3 | | 40 | V | | 3 |
| Constant-current output port withstand voltage (Hi1246) | VD | -0.3 | | 60 | V | | 3 |
| PWM input voltage | VDim | -0.3 | | 6 | V | | 3 |
| CS port withstand voltage | VCS | -0.3 | | 6 | V | | 3 |
| Maximum allowable power dissipation | PD | | | 0.35 | W | see note 2: limited by TJMAX, RθJA and TA | 3 |
| Storage temperature | TSTG | -40 | | 150 | ℃ | | 3 |
| Operating junction temperature | TJ | -40 | | 125 | ℃ | | 3 |
| ESD HBM rating | VESD | 2 | | | KV | HBM; datasheet prints '>2 KV' | 3 |
| Junction-to-ambient thermal resistance | RθJA | | 210 | | ℃/W | | 3 |
## CAD (KiCad official)
- Symbol: `Hi1246`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `hi1246-etched.step` / `hi1246-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hi1246.step` / `hi1246.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Hichips datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757955980963254272) (8 pp, sha256 `27aca28cedfa19ec`, retrieved 2026-10-18, 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](docs/hi1246-datasheet.pdf)