IP6831 from INJOINIC, in a QFN-16-EP(3x3). 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	BOOT1	output	Bootstrap pin for the synchronous rectifier. Connect an external 10 nF bootstrap capacitor to AC1.
2	COMM1	output	Communication signal modulation pin. Connect an external 22 nF modulation capacitor for ASK back-channel communication to the Qi transmitter.
3	RECT	output	Rectifier circuit output. Connect an external filter capacitor. Absolute maximum voltage 20 V; OVP threshold ~18 V; UV protection ~2.5-2.7 V.
4	NC1	unconnected	No connect. Leave floating.
5	SET	input	Internal set pin. Connect a 100 kΩ resistor to GND for normal operation.
6	NC4	unconnected	No connect. Leave floating.
7	PGND	power_in	Power ground return for the output stage.
8	OUT	power_out	Power output pin. Connect an external filter capacitor. Typical VOUT ≈ 5.0-5.1 V, IOUT_MAX = 400 mA.
9	N_EN	input	Chip enable signal, active-low. VIH ≥ 1.5 V, VIL ≤ 0.6 V.
10	PVDD	power_out	Internal LDO power output. Connect a 1 μF decoupling capacitor to GND.
11	COMM2	output	Communication signal modulation pin. Connect an external 22 nF modulation capacitor for ASK back-channel communication to the Qi transmitter.
12	BOOT2	output	Bootstrap pin for the synchronous rectifier. Connect an external 10 nF bootstrap capacitor to AC2.
13	AC2	input	Receive coil AC input (phase 2). Absolute maximum -0.8 V to 20 V; max input current 1 A.
14	NC2	unconnected	No connect. Leave floating.
15	NC3	unconnected	No connect. Leave floating.
16	AC1	input	Receive coil AC input (phase 1). Absolute maximum -0.8 V to 20 V; max input current 1 A.
17	EPAD	power_in	Exposed thermal pad on the bottom of the package. Connect to GND for electrical ground return and thermal dissipation.

Key specifications

Parameter	Value
Manufacturer	INJOINIC
Package	QFN-16-EP(3x3)
Category	PMIC
Pins	17

CAD (KiCad official)

Symbol: IP6831
Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
3D model: QFN-16-EP(3x3) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ip6831.step`	190 KB	You want the bare part, or you mark your own boards.
`ip6831-etched.step`	1.5 MB	You want the part with `IP6831` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 382 faces against 110 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: INJOINIC datasheet (11 pp, sha256 4d4eb572e90d9883, 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