# TP4366E

**TPOWER** · Battery Management · ESOP-8-EP

TP4366E from TPOWER, in a ESOP-8-EP. 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 | OUT | power_out | Boost output positive terminal and output voltage sense pin (5V/1A output, 4.8V to 5.2V at 1A load with VBAT=3.7V). |
| 2 | BAT | power_in | Lithium-ion battery positive terminal; charges at 0.8A constant current (100mA trickle below 2.9V) and discharge stops at 2.85V. |
| 3 | SW | passive | Drain of the boost power NMOS, connected to the inductor (inductor saturation current must exceed 3A). |
| 4 | GND | power_in | Chip ground. |
| 5 | SWT | bidirectional | Connects to the push button and flashlight LED: short press shows battery level, 2s long press toggles the flashlight, with a maximum drive current of 50mA. |
| 6 | VDD | power_in | Power (charge) input, recommended 4.5V to 5.5V with 6.5V overvoltage protection and recovery below 5.8V. |
| 7 | LED2 | output | LED drive pin for charge state and battery level indication, 2mA drive current at BAT=4V. |
| 8 | LED1 | output | LED drive pin for charge state and battery level indication, 2mA drive current at BAT=4V, flashes at 2Hz for low battery alarm. |
| 9 | GND | power_in | Exposed pad heat sink connected to chip ground; must be well soldered to the PCB ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TPOWER |
| Package | ESOP-8-EP |
| Category | Power Management (PMIC) |
| Pins | 9 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Recommended charging input voltage (VDD) | VDD | 4.5 |  | 5.5 | V |  | 2 |
| Recommended operating ambient temperature (TOP) | TOP | -20 |  | 85 | ℃ |  | 2 |
| Pin voltage to GND (all pins) |  | -0.3 |  | 7 | V |  | 2 |
| Storage ambient temperature |  | -50 |  | 150 | ℃ |  | 2 |
| Operating junction temperature range |  | -40 |  | 150 | ℃ |  | 2 |
| HBM ESD rating |  |  |  | 3000 | V |  | 2 |
| MM ESD rating |  |  |  | 300 | V |  | 2 |
| Charging input voltage (VDD) | VDD | 4.3 | 5 | 5.5 | V |  | 3 |
| Boost output voltage | VOUT | 4.8 | 5 | 5.2 | V | ILOAD=1A,VBAT=3.7V | 3 |
| BAT standby current | ISD_BAT |  | 50 | 80 | uA | VBAT=3.7V | 3 |
| Boost switching frequency | FOSC | 0.7 | 1 | 1.3 | MHz |  | 3 |
| Charging input overvoltage protection threshold | VDD_OVP |  | 6.5 |  | V |  | 3 |
| Charging input overvoltage protection recovery voltage | VDD_OVP_RE |  | 5.8 |  | V |  | 3 |
| Preset charge voltage, 4.2V spec | VBAT |  | 4.2 |  | V | 针对 4.2V 规格 | 3 |
| Preset charge voltage, 4.35V spec | VBAT |  | 4.35 |  | V | 针对 4.35V 规格 | 3 |
| BAT constant charge current | IBAT |  | 0.8 |  | A | 恒流充电模式 | 3 |
| BAT trickle charge current | ITRK |  | 100 |  | mA | 涓流充电模式 | 3 |
| Trickle charge threshold voltage | VTRK |  | 2.9 |  | V | VBAT 上升 | 3 |
| Trickle charge hysteresis voltage | VTRK_HYS |  | 150 |  | mV |  | 3 |
| Charge temperature compensation threshold | TST |  | 120 |  | ℃ |  | 3 |
| Charge zero-current temperature | TZERO |  | 135 |  | ℃ |  | 3 |
| BAT undervoltage lockout threshold | VUV_BAT |  | 3.2 |  | V | VBAT 上升 | 3 |
| BAT low-voltage warning voltage | VWN_BAT |  | 3 |  | V | VBAT 下降 | 3 |
| BAT discharge termination voltage | VBAT_END |  | 2.85 |  | V |  | 3 |
| VDD-VBAT lockout threshold, rising | VSD |  | 180 |  | mV | VDD 上升 | 3 |
| VDD-VBAT lockout threshold, falling | VSD |  | 80 |  | mV | VDD 下降 | 3 |
| LEDx drive current | ILEDx |  | 2 |  | mA | BAT=4V | 3 |
| LEDx charge blink frequency | FLEDx_C |  | 1 |  | Hz |  | 3 |
| LED1 low-battery alarm frequency | FLED1_WN |  | 2 |  | Hz |  | 3 |
| Charge PMOS on-resistance | RON_CHRG |  | 300 |  | mΩ |  | 3 |
| Discharge NMOS on-resistance | RON_NMOS |  | 65 |  | mΩ |  | 3 |
| Discharge PMOS on-resistance | RON_PMOS |  | 65 |  | mΩ |  | 3 |

## CAD (KiCad official)

- Symbol: `TP4366E`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`
- 3D model: ESOP-8-EP (KiCad packages3D, STEP)
- 3D model files: `tp4366e-etched.step` / `tp4366e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tp4366e.step` / `tp4366e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TPOWER datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588903909334634496) (7 pp, sha256 `9763226dcafe74e7`, 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/tp4366e-datasheet.pdf)