# XPD738B

**Shenzhen Fuman** · Battery Management · TSSOP-16

XPD738B from Shenzhen Fuman, in a TSSOP-16. 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 | VPWR | power_in | Input power supply for the chip and the VBUS/VBUSA power paths; the datasheet recommends a VPWR input of 3.6 V to 21 V with CVPWR of 4.7 µF to 10 µF. |
| 2 | VPWR | power_in | Input power supply for the chip and the VBUS/VBUSA power paths; the datasheet recommends a VPWR input of 3.6 V to 21 V with CVPWR of 4.7 µF to 10 µF. |
| 3 | OPTO | output | Drives the optocoupler directly in the constant-voltage loop (replacing a TL431), and can withstand more than 25 V per the datasheet, with an absolute maximum of 28 V. |
| 4 | VFB | input | Voltage regulation feedback input connected to the system voltage divider (RFB1 = 100 kΩ, RFB2 = 33 kΩ for 5 V initial output); the internal reference is 1.24 V and the pin should be kept away from noise. |
| 5 | GND | power_in | Power ground; the Type-A 10 mΩ sense resistor must be Kelvin-connected between ISP2 and this GND pin. |
| 6 | ISP2 | input | Type-A port current sense input, connected to one end of the external 10 mΩ Kelvin sense resistor whose other end is GND. |
| 7 | GD2 | output | Drives the PMOS switch in the Type-A VBUSA power path; the PMOS is recommended to be rated at least 20 V and 3 A. |
| 8 | VBUSA | power_out | Type-A port output power; no bypass capacitor is required on VBUSA, and the absolute maximum rating for this pin is 28 V. |
| 9 | DP2 | bidirectional | Type-A port D+ data line used for protocol communication (QC, FCP/SCP, AFC, BC1.2 and Apple 2.4A signaling), with absolute maximum voltage of 28 V. |
| 10 | DM2 | bidirectional | Type-A port D- data line used for protocol communication (QC, FCP/SCP, AFC, BC1.2 and Apple 2.4A signaling), with absolute maximum voltage of 28 V. |
| 11 | DP1 | bidirectional | Type-C port D+ data line, with overvoltage protection and absolute maximum voltage of 28 V. |
| 12 | DM1 | bidirectional | Type-C port D- data line, with overvoltage protection and absolute maximum voltage of 28 V. |
| 13 | CC1 | bidirectional | Type-C configuration channel 1 for detection and BMC PD communication; the absolute maximum rating is 28 V. |
| 14 | CC2 | bidirectional | Type-C configuration channel 2 for detection and BMC PD communication; the absolute maximum rating is 28 V. |
| 15 | VBUS | power_out | Type-C port VBUS output; the VBUS bypass capacitor CVBUS must not exceed 10 µF per USB requirements, and the absolute maximum rating is 28 V. |
| 16 | VBUS | power_out | Type-C port VBUS output; the VBUS bypass capacitor CVBUS must not exceed 10 µF per USB requirements, and the absolute maximum rating is 28 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen Fuman |
| Package | TSSOP-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 耐压值 (VPWR, VBUS, VBUSA, CC1, CC2, DP1, DM1, DP2, DM2, OPTO) |  | -0.3 |  | 28 | V |  | 6 |
| 其他 (other pins) 耐压值 |  | -0.3 |  | 7 | V |  | 6 |
| 结温 (junction temperature) | TJ | -40 |  | 150 | ℃ |  | 6 |
| 存储温度 (storage temperature) |  | -65 |  | 150 | ℃ |  | 6 |
| ESD HBM | VESD | -4000 |  | 4000 | V | Human body model (HBM) | 6 |
| VPWR 输入电压 (input voltage) | VPWR | 3.6 |  | 21 | V |  | 6 |
| TA 工作环境温度 (ambient operating temperature) | TA | -40 |  | 85 | ℃ |  | 6 |
| CVPWR VPWR 电容 | CVPWR | 4.7 |  | 10 | µF |  | 6 |
| Fast OVP 门限 (always enabled) | VFOVP |  |  | 20 | % | Ref to target voltage | 7 |
| Slow OVP 门限 | VSOVP |  |  | 15 | % | Ref to target voltage | 7 |
| VBUS UVP 门限 | VSUVP | -22 |  |  | % | Ref to target voltage | 7 |
| A 口轻载电流 小电流关断阈值 | Ith | 2.5 | 12.5 | 22.5 | mA | 10mohm 1%采样电阻 | 7 |
| Transmit LOW | VTXLO | -75 |  | 75 | mV |  | 7 |
| Rise/fall time of BMC | tBMC | 300 |  | 600 | ns | Rload=5.1k,Cload=1nF | 7 |
| Receive HIGH | VRXHI | 800 | 840 | 885 | mV |  | 7 |
| Receive LOW | VRXLO | 485 | 525 | 570 | mV |  | 7 |
| Broadcasting current CC1/CC2 (3A DFP mode) | IRP_SRC | 304 | 330 | 356 | uA | 3A DFP mode, 0 ≤ VCCX ≤ 2.5V | 7 |
| Broadcasting current CC1/CC2 (1.5A DFP mode) | IRP_SRC | 166 | 180 | 194 | uA | 1.5A DFP mode, 0 ≤ VCCX ≤ 1.5V | 7 |
| OCP threshold (ref to power capability pd) | VITRIP |  |  | 30 | % | Ref to Power Capability(pd) | 7 |
| OTP die temperature | TJ1 | 135 | 145 | 155 | ℃ | Temperature rising edge | 7 |
| 数据线检测电压 | VDAT(REF) | 0.25 | 0.325 | 0.4 | V |  | 7 |
| 输出电压选择 | VSEL(REF) | 1.8 | 2 | 2.2 | V |  | 7 |
| D+高电平扰动滤波时间 | TGLITCH(DP)HIGH | 1 | 1.25 | 1.5 | s |  | 7 |
| 输出电压扰动滤波时间 | TGLITCH(V)CHANGE | 20 | 40 | 60 | ms |  | 8 |
| 连续模式的扰动滤波时间 | TGLITCH(CONT)CHANGE | 100 | 150 | 200 | us |  | 8 |
| D+漏泄电阻 | RDAT(LKG) | 300 | 500 | 800 | KΩ |  | 8 |
| D-下拉电阻 | RDM(DWN) | 14.25 | 19.53 | 24.5 | KΩ |  | 8 |
| 开关 N1 导通电阻 | RON(N1) | 40 |  | 100 | Ω |  | 8 |
| 受电设备连接检测电压阈值 | VTH(PD) | 0.25 | 0.325 | 0.4 | V |  | 8 |
| 受电设备连接检测滤波时间 | TDPD | 120 | 160 | 200 | ms |  | 8 |
| D+/D- 数据线电压 (Apple 2.4A) | VDAT(2.7V) | 2.57 | 2.7 | 2.84 | V |  | 8 |
| VPWR UVLO 门限 (rising edge) | VVPWR_TH |  | 3.3 |  | V | Rising edge | 7 |
| VPWR UVLO 门限 (falling edge) | VVPWR_TH |  | 2.9 |  | V | Falling edge | 7 |
| VPWR UVLO 门限 hysteresis | VVPWR_TH |  | 0.4 |  | V | Hysteresis | 7 |
| 典型工作电流 | ISUPP |  | 2 |  | mA | VPWR=5V，VBUS=5V | 7 |
| Switch MOSFET RDSON | RDSON |  | 10 |  | mΩ |  | 7 |
| Output resistance | RTX |  | 50 |  | Ω | During transmission | 7 |
| Transmit HIGH | VTXHI |  | 1.15 |  | V |  | 7 |
| Bit unit interval | tUI |  | 3.3 |  | us |  | 7 |
| OTP die temperature hysteresis |  |  | 20 |  | ℃ | Hysteresis | 7 |
| D-低电平扰动滤波时间 | TGLITCH(DM)LOW |  | 1 |  | ms |  | 7 |
| 电压升高时电流源阶跃步长 | ΔIT(UP) |  | 2 |  | uA | RIREF=100KΩ | 8 |
| 电压降低时电流源阶跃步长 | ΔIT(DO) |  | 2 |  | uA | RIREF=100KΩ | 8 |
| D+/D- 数据线输出阻抗 (Apple 2.4A) | RDAT(2.7V) |  | 15 |  | KΩ |  | 8 |
| D- FCP TX Valid High | VTX-VOH |  | 2.7 |  | V |  | 8 |
| D- FCP TX Valid Low | VTX-VOL |  | 0.3 |  | V |  | 8 |
| D- FCP RX Valid High | VRX-VIH |  | 1.2 |  | V |  | 8 |
| D- FCP RX Valid (printed as 'High') | VRX-VIL |  | 0.9 |  | V |  | 8 |
| FCP Pulse Rise Time | Trise |  | 2.5 |  | us | 10% - 90% | 8 |
| FCP Pulse Fall Time | Tfall |  | 2.5 |  | us | 90% - 10% | 8 |
| 结温和周围温度之间的热阻 (junction to ambient, footnote 1) | RθJA |  | 100 |  | ℃/W |  | 6 |
| 结温和封装外壳表面温度之间的热阻 (junction to case top) | RθJCtop |  | 36 |  | ℃/W |  | 6 |
| 结温和板温度之间的热阻 (junction to board) | RθJB |  | 45 |  | ℃/W |  | 6 |
| VBUS 电容 | CVBUS |  | 1 |  | µF |  | 6 |
| 系统电压分压电阻 RFB1 | RFB1 |  | 100 |  | kΩ |  | 6 |
| 系统电压分压电阻 RFB2 | RFB2 |  | 33 |  | kΩ |  | 6 |
| Type-A 口电流检测电阻 | RS |  | 10 |  | mΩ |  | 6 |

## CAD (KiCad official)

- Symbol: `XPD738B`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `xpd738b-etched.step` / `xpd738b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xpd738b.step` / `xpd738b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen Fuman datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588944469193838592) (15 pp, sha256 `0123040f459b2f8b`, retrieved 2026-10-19, 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/xpd738b-datasheet.pdf)