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SE9450-HF

Public Made by Adom

by adom

Seaward Elec Battery Management, ESOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Contents

README

markdown

SE9450-HF

Seaward Elec · Battery Management · ESOP-8

SE9450-HF from Seaward Elec, in a ESOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 TEMP input Battery temperature sense input. Connect to the divider between VCC and an external NTC thermistor. Charging is suspended when V(TEMP) < 45%*Vcc or V(TEMP) > 80%*Vcc. Tying TEMP to GND disables the temperature-monitoring function while leaving other functions operational.
2 PROG passive Charge-current program and monitor pin. A resistor R_PROG from PROG to GND sets the constant charge current (I_BAT = 1000/R_PROG, giving 1A at R_PROG = 1kΩ). Pin sits at ~1.0V in current mode; C/10 termination is detected when PROG drops below ~100mV.
3 GND power_in Device ground / power return.
4 VCC power_in Positive supply input for the charger. Recommended operating range 4.5V to 25V; absolute maximum 28V. Internal OVP disables the charger above 6.5V (rising) with 200mV hysteresis; UVLO threshold ~3.7V rising.
5 BAT power_out Battery connection. Charging current is delivered through this pin from the internal PMOS pass device; float voltage is 4.2V (A suffix) or 4.35V (C suffix) with ±1% accuracy, and IBAT can reach 1A. Absolute max 11V; drives <2uA leakage into the battery when VCC is removed.
6 STDBY output Charge-complete indicator (open-drain). Pulled low when the charge cycle has terminated (C/10 detected); high-impedance in all other states. Vol ≤ 0.4V at 5mA sink.
7 CHRG output Charge-in-progress indicator (open-drain). Pulled low while the charger is actively delivering current; high-impedance otherwise. Flashes at ~1-4s when a fault (missing battery) is detected with a 10uF cap at BAT. Vol ≤ 0.4V at 5mA sink.
8 CE input Chip enable input. Drive high to enable normal charger operation; drive low to place the part in shutdown. Absolute max 6.0V.

Key specifications

Parameter Value
Manufacturer Seaward Elec
Package ESOP-8
Category PMIC
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • SE9450P-42-HF
  • SE9450P-435-HF
  • SE9450BP-42-HF
  • SE9450BP-435-HF
  • SE9450D-42-HF
  • SE9450D-435-HF
  • SE9450BD-42-HF
  • SE9450BD-435-HF

CAD (KiCad official)

  • Symbol: SE9450-HF
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm
  • 3D model: ESOP-8 (KiCad packages3D, STEP)
  • 3D model files: se9450-hf-etched.step / se9450-hf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); se9450-hf.step / se9450-hf.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
se9450-hf.step 125 KB You want the bare part, or you mark your own boards.
se9450-hf-etched.step 1.9 MB You want the part with SE9450-HF already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 471 faces against 152 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: Seaward Elec datasheet (14 pp, sha256 8a53ce8ea33ee242, retrieved 2026-08-17, 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: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF