# TP4066

**HXY MOSFET** · Battery Management ICs · ESOP-8

TP4066 from HXY MOSFET, in a ESOP-8. 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 | TEMP | input | Battery temperature sense input compared against 45% and 80% of VCC thresholds; connect to GND to disable temperature monitoring. |
| 2 | PROG | passive | Constant-charge current set and charge current monitor pin; a resistor RPROG to GND programs the current (1.1k gives 1000mA) with a 1.0V typical PROG voltage. |
| 3 | GND | power_in | Ground. |
| 4 | VCC | power_in | Positive input supply, operating range 4.2V to 9V (absolute maximum 9V). |
| 5 | BAT | power_out | Battery connection pin supplying charge current, with float voltage of 4.2V or 4.35V and battery reverse-connection protection. |
| 6 | STDBY | output | Open-drain charge-complete indicator output, pulled low when charging has terminated. |
| 7 | CHRG | output | Open-drain charge status indicator output, pulled low while charging. |
| 8 | CE | input | Chip enable input; high enables charging and low stops charging. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| Package | ESOP-8 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Input supply operating voltage | VCC | 4.2 | 5 | 9 | V | VCC=5V, TJ=25°C | 4 |
| Standby mode supply current | ICC-IBAT |  | 70 | 120 | uA | Standby mode (charge terminated) | 4 |
| Shutdown mode supply current | ICC-IBAT |  | 70 | 120 | uA | Shutdown mode (RPROG not connected, VCC<VBAT, VCC<VUV) | 4 |
| Regulated output (float) voltage 4.2V | VFLOAT | 4.158 | 4.2 | 4.242 | V | 0°C≤TA≤85°C | 4 |
| Trickle charge current | ITRIKL | 310 | 350 | 390 | mA | VBAT<VTRIKL, RPROG=1.1K | 4 |
| Trickle charge threshold voltage | VTRIKL | 2.8 | 2.9 | 3 | V | RPROG=1.1K, VBAT rising | 4 |
| Trickle charge hysteresis voltage | VTRHYS | 60 | 80 | 100 | mV | RPROG=1.1K | 4 |
| VCC undervoltage lockout hysteresis | VUVHYS | 150 | 200 | 300 | mV |  | 4 |
| PROG pin voltage | VPROG | 0.9 | 1 | 1.1 | V | RPROG=1.1K, current mode | 4 |
| Recharge battery threshold voltage | ΔVRECHRG | 80 | 110 | 140 | mV | VFLOAT-VRECHRG | 4 |
| Recharge comparator filter time | tRECHARGE | 0.8 | 2 | 4 | ms | VBAT high to low | 4 |
| Termination comparator filter time | tTERM | 0.8 | 2 | 4 | ms | BAT falls below ICHG/10 | 4 |
| VCC supply voltage | VCC | -0.3 |  | 9 | V |  | 3 |
| BAT pin voltage | VBAT | -4.35 |  | 7 | V |  | 3 |
| CHRG and STDBY pin voltage |  | -0.3 |  | 10 | V |  | 3 |
| TEMP pin voltage |  | -0.3 |  | 10 | V |  | 3 |
| PROG pin voltage |  | -0.3 |  | 10 | V |  | 3 |
| Storage temperature range |  | -65 |  | 125 | °C |  | 3 |
| BAT pin current |  |  |  | 1200 | mA |  | 3 |
| PROG pin current |  |  |  | 1200 | uA |  | 3 |
| Junction temperature |  |  |  | 145 | °C |  | 3 |
| Soldering temperature |  |  |  | 260 | °C | 10s | 3 |
| Power dissipation | PD |  |  | 2.1 | W | TA=25°C | 3 |
| Package thermal resistance | θJA |  | 50 |  | °C/W |  | 3 |

## CAD (KiCad official)

- Symbol: `TP4066`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `tp4066-etched.step` / `tp4066-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tp4066.step` / `tp4066.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HXY MOSFET datasheet](docs/tp4066-datasheet.pdf) (11 pp, sha256 `346c4fe9176b269a`, retrieved 2026-10-22, 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-sonnet-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/tp4066-datasheet.pdf)