# AP4310EMTR-G1

**Diodes Incorporated** · Battery Management · SO-8

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)
- 3D model files: `ap4310emtr-g1-etched.step` / `ap4310emtr-g1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ap4310emtr-g1.step` / `ap4310emtr-g1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/AP4310EMTR-G1.pdf) (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](docs/ap4310emtr-g1-datasheet.pdf)