# TP4584B

**TPOWER** · Battery Management · ESOP8

TP4584B from TPOWER, in a ESOP8. 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 | VDD | power_in | Charging input supply, recommended 4.5 V to 5.5 V (5 V typical), with an input overvoltage protection threshold of 6 V. |
| 2 | LED1 | output | Battery-level indicator LED driver (about 1.4 mA at VBAT=4 V); it flashes at 1 Hz while charging the current level, and at 2 Hz as a fast-flash low-battery warning when BAT falls below 3.05 V. |
| 3 | LED2 | output | Battery-level indicator LED driver (about 1.4 mA at VBAT=4 V) that shows charge and discharge state together with LED1 and LED3. |
| 4 | LED3 | output | Battery-level indicator LED driver (about 1.4 mA at VBAT=4 V) that shows charge and discharge state together with LED1 and LED2. |
| 5 | SWT | input | Push-button input: a single click (longer than 50 ms) turns the boost output on and shows battery level, and a double click within 500 ms turns it off; it has an internal pull-up of about 30 uA at VBAT=3.7 V. |
| 6 | BAT | bidirectional | Lithium-ion battery positive terminal used for linear charging (250 mA constant current, 4.2 V float) and as the boost discharge input, with BAT undervoltage lockout at 3.15 V rising. |
| 7 | SW | passive | Boost converter power switch node, which must connect to inductor L1 with a short, wide trace kept close to the BAT capacitor. |
| 8 | OUT | power_out | Boost regulated output (5 V nominal, 4.8 V to 5.2 V at 0.5 A load) with output overvoltage protection at 5.25 V and an output current limit of 500 mA maximum. |
| 9 | GND | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TPOWER |
| Package | ESOP8 |
| 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 |
|---|---|---|---|---|---|---|---|
| VDD 充电输入电压 | VDD | 4.5 | 5 | 5.5 | V |  | 3 |
| 充电输入过压保护阈值 | VDDOVP |  | 6 |  | V |  | 3 |
| 充电输入过压保护滞回 | VDDOVP_HYS |  | 250 |  | mV |  | 3 |
| 预设充电浮充电压 | VBAT | 4.15 | 4.2 | 4.25 | V |  | 3 |
| 再充电阈值电压 | △VRECHRG |  | 200 |  | mV | VBAT-VRECHRG | 3 |
| BAT 恒流充电电流 | IBAT | 200 | 250 | 300 | mA | VBAT=3.7V | 3 |
| BAT 涓流充电电流 | ITRK |  | 25 |  | mA | VBAT=2.5V | 3 |
| BAT 截止充电电流 | IFULL |  | 60 |  | mA |  | 3 |
| 涓流充电阈值电压 | VTRK |  | 2.9 |  | V | VBAT上升 | 3 |
| 涓流充电滞回电压 | VTRK_HYS |  | 100 |  | mV | VBAT下降 | 3 |
| 温度补偿开始阈值 | TST |  | 115 |  | ℃ |  | 3 |
| 零电流温度 | TZERO |  | 135 |  | ℃ |  | 3 |
| VDD-VBAT锁定阈值 | VSD |  | 190 |  | mV | VDD 上升 | 3 |
| VDD-VBAT锁定阈值 | VSD |  | 80 |  | mV | VDD 下降 | 3 |
| VDD 到 OUT 电阻 | RVDD_OUT |  | 600 |  | mΩ | 边充边放，IOUT=0.5A | 3 |
| 升压输出电压 | VOUT | 4.8 | 5 | 5.2 | V | IOUT=0.5A,VBAT=3.7V | 3 |
| 升压电路工作频率 | FOSC | 700 | 900 | 1100 | KHz |  | 3 |
| 最大占空比 | DMAX |  | 90 |  | % |  | 3 |
| 升压输出过压保护电压 | VOVP |  | 5.25 |  | V |  | 3 |
| 升压输出过流保护电压 | VOCP |  | 4.25 |  | V |  | 3 |
| 升压输出短路保护电压 | VSHORT |  | 2.8 |  | V |  | 3 |
| 升压输出过流保护延时 | TOCP |  | 8 |  | ms |  | 3 |
| 升压输出短路保护延时 | TSHORT |  | 280 |  | us |  | 3 |
| BAT 欠压锁定阈值电压 | VUV_BAT |  | 3.15 |  | V | VBAT上升 | 3 |
| BAT 低压报警电压 | VWN_BAT |  | 3.05 |  | V | VBAT下降 | 3 |
| BAT 放电终止电压 | VBAT_END |  | 2.85 |  | V |  | 3 |
| BAT 待机电流 | ISD_BAT |  | 19 |  | uA | 输出关机 | 3 |
| 自动关机时对应的输出电流 | IOFF |  | 5 |  | mA | COUT=10uF | 3 |
| 输出自动关机延时 | TOFF |  | 16 |  | s |  | 3 |
| 自动开机时负载识别电流 | IST |  | 10 |  | uA |  | 3 |
| SWT 脚上拉电流 | ISWT |  | 30 |  | uA | VBAT=3.7V | 3 |
| SWT 单击有效的延时 | TDSWT |  | 50 |  | ms |  | 3 |
| SWT 双击的两次按键间隔 | TDCLICK |  | 500 |  | ms |  | 3 |
| 过温保护阈值 | TOTP |  | 150 |  | ℃ |  | 3 |
| 过温保护滞回 | TOTP_HYS |  | 20 |  | ℃ |  | 3 |
| LEDx 驱动电流 | ILEDx |  | 1.4 |  | mA | VBAT=4V | 3 |
| LEDx 充电闪烁频率 | FLEDx_C |  | 1 |  | Hz |  | 3 |
| LED1 低电闪烁频率 | FLED1_WN |  | 2 |  | Hz |  | 3 |
| 所有引脚电压 |  | -0.3 |  | 6 | V |  | 2 |
| 储存环境温度 |  | -50 |  | 150 | ℃ |  | 2 |
| 工作结温范围 |  | -40 |  | 150 | ℃ |  | 2 |
| ESD（HBM） |  |  |  | 4000 | V | HBM | 2 |
| 充电输入电压 | VDD | 4.5 |  | 5.5 | V |  | 2 |
| 工作环境温度 | TOP | -20 |  | 85 | ℃ |  | 2 |

## CAD (KiCad official)

- Symbol: `TP4584B`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`
- 3D model: ESOP8 (KiCad packages3D, STEP)
- 3D model files: `tp4584b-etched.step` / `tp4584b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tp4584b.step` / `tp4584b.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/8590904281065611264) (6 pp, sha256 `c4d46cf6b9c36803`, retrieved 2026-10-17, 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/tp4584b-datasheet.pdf)