FD6187T from Fortior Tech, in a TSSOP-20. 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	HIN1	input	High-side logic input for phase 1. 3.3V/5V logic-compatible; non-inverting to HO1 output.
2	HIN2	input	High-side logic input for phase 2. 3.3V/5V logic-compatible; non-inverting to HO2 output.
3	HIN3	input	High-side logic input for phase 3. 3.3V/5V logic-compatible; non-inverting to HO3 output.
4	LIN1*	input	Low-side logic input for phase 1 (active-low / inverting). Output LO1 is inverted relative to this input.
5	LIN2*	input	Low-side logic input for phase 2 (active-low / inverting). Output LO2 is inverted relative to this input.
6	LIN3*	input	Low-side logic input for phase 3 (active-low / inverting). Output LO3 is inverted relative to this input.
7	VCC	power_in	Low-side supply voltage. Recommended operating range 5.0V to 22V; absolute max 25V. UVLO protection built-in.
8	COM	power_in	Common ground / low-side return; reference point for all voltages unless otherwise noted.
9	LO3	output	Low-side gate drive output for phase 3. +/-0.8A drive; inverted relative to LIN3*.
10	LO2	output	Low-side gate drive output for phase 2. +/-0.8A drive; inverted relative to LIN2*.
11	LO1	output	Low-side gate drive output for phase 1. +/-0.8A drive; inverted relative to LIN1*.
12	VS3	power_in	High-side floating supply return / source-node reference for phase 3. Connects to the switching node (source of high-side MOSFET). Range -5V to 180V.
13	HO3	output	High-side gate drive output for phase 3. Floating output referenced to VS3; non-inverting to HIN3. +/-0.8A drive.
14	VB3	power_in	High-side floating bootstrap supply for phase 3. Absolute maximum 205V; operating VB - VS = 4V to 22V. Connect bootstrap capacitor from VB3 to VS3.
15	VS2	power_in	High-side floating supply return / source-node reference for phase 2. Connects to the switching node of phase 2 half-bridge. Range -5V to 180V.
16	HO2	output	High-side gate drive output for phase 2. Floating output referenced to VS2; non-inverting to HIN2. +/-0.8A drive.
17	VB2	power_in	High-side floating bootstrap supply for phase 2. Absolute maximum 205V; operating VB - VS = 4V to 22V. Connect bootstrap capacitor from VB2 to VS2.
18	VS1	power_in	High-side floating supply return / source-node reference for phase 1. Connects to the switching node of phase 1 half-bridge. Range -5V to 180V.
19	HO1	output	High-side gate drive output for phase 1. Floating output referenced to VS1; non-inverting to HIN1. +/-0.8A drive.
20	VB1	power_in	High-side floating bootstrap supply for phase 1. Absolute maximum 205V; operating VB - VS = 4V to 22V. Connect bootstrap capacitor from VB1 to VS1.

Key specifications

Parameter	Value
Manufacturer	Fortior Tech
Package	TSSOP-20
Category	PMIC
Pins	20

Ordering variants

Same part, different packaging or reel option.

FD6187T

CAD (KiCad official)

Symbol: FD6187T
Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
3D model: TSSOP-20 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`fd6187t.step`	267 KB	You want the bare part, or you mark your own boards.
`fd6187t-etched.step`	2.1 MB	You want the part with `FD6187T` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 526 faces against 327 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Fortior Tech datasheet (15 pp, sha256 b1b422919d87c8e8, retrieved 2026-08-17, 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: 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