AP4310EMTR-G1 from Diodes Incorporated, in a SO-8. 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	OUTPUT 1	output	Op Amp 1 output. Voltage-loop error amplifier output; typical output swing 0 to VCC-1.5V, source/sink 40/20mA typ. Used to drive an opto-isolator in CV feedback.
2	INPUT 1-	input	Op Amp 1 inverting input. The non-inverting input of Op Amp 1 is tied internally to the 2.5V reference (VKA), so this pin is the summing node for the voltage feedback divider. Input voltage range -0.3V to VCC+0.3V (abs max).
3	INPUT 1+/VKA	input	Op Amp 1 non-inverting input, connected internally to the cathode (VKA) of the 2.5V shunt voltage reference. Also serves as the reference cathode pin; absolute-maximum cathode current 100mA, minimum cathode current for regulation 0.05mA, dynamic impedance 0.2Ω typ.
4	GND	power_in	Device ground / voltage reference anode. Common return for VCC, both op amps, and the shunt reference.
5	INPUT 2+	input	Op Amp 2 non-inverting input (uncommitted). Input voltage range 0 to VCC-1.5V; abs max -0.3V to VCC+0.3V. Op Amp 2 differential input range ±40V (abs max between pins 5 and 6).
6	INPUT 2-	input	Op Amp 2 inverting input (uncommitted). Used with pin 5 for the current-sense feedback loop in typical CC/CV charger applications.
7	OUTPUT 2	output	Op Amp 2 output. Current-loop error amplifier output; typical output swing 0 to VCC-1.5V, source/sink 40/20mA typ, 1MHz unity-gain bandwidth.
8	VCC	power_in	Positive supply. Operating range 3V to 36V (abs max 40V to GND). Total supply current 0.15mA typ @ 5V, 0.20mA typ @ 30V (excluding reference current).

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	SO-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

AP4310EMTR-G1

CAD (KiCad official)

Symbol: AP4310EMTR-G1
Footprint: Package_SO:TI_SO-PowerPAD-8
3D model: SO-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Diodes Incorporated datasheet (9 pp, sha256 95f70ec8f108db97, retrieved 2026-08-17, tier: manufacturer)
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