# IP2709_BF20WP

**INJOINIC** · Battery Management · QFN-24(4x4)

IP2709_BF20WP from INJOINIC, in a QFN-24(4x4). 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 | VCC | power_out | Internal supply output from the LDO (2.5 to 3.3 V per the block diagram) that requires an external 2.2 uF capacitor. |
| 2 | CMPV | input | CC loop feedback terminal for optocoupler-mode regulation, with its CMPV compensation network matched to the front-end power supply. |
| 3 | SDA/CMPI | bidirectional | I2C bus data line in I2C mode; in FB divider mode it is the CC loop feedback terminal, with the CMPI compensation network connected to FB. |
| 4 | SCK | output | I2C bus clock from the integrated I2C master interface used to control a compatible front-end power supply. |
| 5 | FB | output | Feedback loop drive output connected to the reference input of the external power supply error amplifier to set output voltage; FB sinks about 40 uA at 9 V and about 70 uA at 12 V output, and neither sources nor sinks at 5 V. |
| 6 | PLUGA | input | USB-A port plug-in detection input that detects load insertion, with the series resistor value affecting detection sensitivity. |
| 7 | IO1 | bidirectional | General-purpose I/O (GPIO1) with VIH of 0.7VCC minimum, VIL of 0.3VCC maximum, VOH of VCC and VOL of GND. |
| 8 | CSPA | input | Positive current-sense input for the USB-A port, used with an external 5 mOhm sense resistor. |
| 9 | CSNA | input | Negative current-sense input for the USB-A port, used with an external 5 mOhm sense resistor. |
| 10 | CSN | input | Negative current-sense input for the TYPE-C port, used with an external 10 mOhm sense resistor in single-port fast-charge mode. |
| 11 | CSP | input | Positive current-sense input for the TYPE-C port, used with an external 10 mOhm sense resistor in single-port fast-charge mode. |
| 12 | DPA | bidirectional | USB-A D+ (DP) data line connection used for fast-charge protocol and BC1.2/Apple/Samsung detection. |
| 13 | DMA | bidirectional | USB-A D- (DM) data line connection used for fast-charge protocol and BC1.2/Apple/Samsung detection. |
| 14 | CC2 | bidirectional | Type-C CC2 detection pin, rated to 30 V absolute maximum. |
| 15 | DPC | bidirectional | TYPE-C D+ (DP) data line connection used for fast-charge protocol detection. |
| 16 | DMC | bidirectional | TYPE-C D- (DM) data line connection; DP/DM absolute maximum is -0.3 V to 25 V. |
| 17 | CC1 | bidirectional | Type-C CC1 detection pin, rated to 30 V absolute maximum. |
| 18 | GND | power_in | Ground pin. |
| 19 | NTC | input | Temperature sense input that sources 20 uA into an NTC thermistor (100 kOhm at 25 C in the reference design); tie a 51 kOhm resistor to GND if the NTC function is not used. |
| 20 | VOUT2 | input | USB-A port output voltage detection pin for the discharge output. |
| 21 | VOUT2G | output | Gate drive output for the USB-A external NMOS power switch; recommended NMOS Vds rating is 30 V or higher. |
| 22 | VOUT1 | input | TYPE-C port output voltage detection pin for the discharge output. |
| 23 | VOUT1G | output | Gate drive output for the TYPE-C external NMOS power switch; recommended NMOS Vds rating is 30 V or higher. |
| 24 | VIN | power_in | Power input pin with recommended operating input of 3 V to 15 V and absolute maximum of -0.3 V to 18 V. |
| 25 | EPAD | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | INJOINIC |
| Package | QFN-24(4x4) |
| Category | Power Management (PMIC) |
| Pins | 25 |

## CAD (KiCad official)

- Symbol: `IP2709_BF20WP`
- Footprint: `Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm`
- 3D model: QFN-24(4x4) (KiCad packages3D, STEP)
- 3D model files: `ip2709-bf20wp-etched.step` / `ip2709-bf20wp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ip2709-bf20wp.step` / `ip2709-bf20wp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [INJOINIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590918327659548672) (18 pp, sha256 `5ed3ef7183e65a83`, retrieved 2026-10-09, 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/ip2709-bf20wp-datasheet.pdf)