component
SE9019
Public Made by Adomby adom
Seaward Elec Battery Management, SOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSE9019
Seaward Elec · Battery Management · SOP-8-EP
SE9019 from Seaward Elec, in a SOP-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 | EN | input | Enable input; pulling it low to ground shuts the chip down, placing CHRG and STDBY in high-impedance and reducing quiescent current to about 10 µA. |
| 2 | BAT | power_out | Battery positive connection that also serves as the battery voltage feedback input; the float voltage is 4.2 V or 4.35 V (±1%). |
| 3 | SEN | input | Charge current setting pin, where the charge current is I = 100 mV / R5 using an external sense resistor between SEN and BAT. |
| 4 | SW | output | Switching output node of the 1 MHz (typ.) current-mode PWM buck converter. |
| 5 | GND | power_in | Ground (analog ground); the bottom exposed heatsink pad is also ground, and the datasheet recommends a direct copper connection between this pin and the heatsink without crossing traces. |
| 6 | VIN | power_in | Power input with a recommended range of 4.7 V to 5.5 V and an absolute maximum of -0.3 V to 6.5 V; an input capacitor of at least 10 µF must be placed close to this pin. |
| 7 | CHRG | output | Charge status output that is pulled low during charging and is high-impedance when charging is terminated or in sleep mode, with VOL of 0.2 V to 0.6 V at 5 mA. |
| 8 | TEMP | input | Battery temperature sense input for a 40 kΩ NTC thermistor to ground, with a hot threshold of 0.35 V and a cold threshold of 2.4 V; it must not float (tie to GND if unused), and below 80 mV it disables temperature sensing. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Seaward Elec |
| Package | SOP-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 |
|---|---|---|---|---|---|---|---|
| Input voltage | VIN | 4.7 | 5 | 5.5 | V | 5 | |
| Battery float voltage | VFLOAT | 4.158 | 4.2 | 4.242 | V | IOUT=0.1A(Rsen=0.2Ω) | 5 |
| Maximum duty cycle | DC | 100 | % | 6 | |||
| CHRG pin output low voltage | Vchrg | 0.2 | 0.6 | V | Ichrg=5mA | 6 | |
| Input voltage absolute maximum | VIN | -0.3 | 6.5 | V | 5 | ||
| Input/output pin voltage absolute maximum | -0.3 | 6.5 | V | 5 | |||
| VIN/GND/SW input-output current absolute maximum | IVIN/GND/SW | 3 | A | 5 | |||
| Junction operating temperature absolute maximum | TJ | -40 | 150 | °C | 5 | ||
| Storage temperature absolute maximum | TST | -55 | 150 | °C | 5 | ||
| Soldering temperature | 260 | °C | <10 s | 5 | |||
| Input supply voltage recommended operating range | VCC | 4.7 | 5.5 | V | 5 | ||
| Junction operating temperature recommended range | TJ | -20 | 125 | °C | 5 |
CAD (KiCad official)
- Symbol:
SE9019 - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: SOP-8-EP (KiCad packages3D, STEP)
- 3D model files:
se9019-etched.step/se9019-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);se9019.step/se9019.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Seaward Elec datasheet (11 pp, sha256
b37504cec1c7e4c2, retrieved 2026-10-18, 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, primaryclaude-haiku-5-5(text), consensusclaude-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).