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SMD code GI3

Marking codes are not standardised, and the same code is reused by unrelated makers for unrelated parts. Below is every part in our tables printed with it, and any printed with a code that is easy to misread as it, from the manufacturers' own marking tables and published code lists.

2 parts are printed GI3

Not sure which one you have?

Answer up to 4 quick questions and these 2 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • FP6908BS5SOT-23-5Battery charger, 5 pins, FitipowerBattery chargerSOT-23-55 pinsFitipower
    What it is
    Battery charger
    Maker
    Fitipower
    Package
    SOT-23-5
    Pins
    5
    Details
    30V, 1A Li-ion/Li-Polymer Linear Battery Charger Applications 電動牙刷 智能門鎖 掃地機器人 POS機 電子書 網路連網攝影機
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: Integrated circuit.

    Datasheetfor FP6908BS5, opens in a new tab
  • 1 more part has no package on record
    • LM49370RLNational SemiconductorNot recordedNot recordedNot recordedNational Semiconductor
      What it is
      Not recorded
      Maker
      National Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear IC: APA, BTL, class-D, 2.5..5.5V, 1.2W(4)+2x33mW(32), shutdown
      Source
      Published code list

      Is it dead? The meter test is below: Integrated circuit.

Is it dead? One meter test per kind

Parts of the same kind are tested the same way, so each test is here once. Each part above points to its own.

Integrated circuit

Voltage with the board powered; ohms from each pin to ground with it off.

Working, it reads

Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.

Dead, it reads

  • A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
  • Supply present, output stuck: failed, or its load has.
On the board:
A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
Compare:
The surest reference is the same IC on a working board, measured pin by pin.
Watch for:
Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.

A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

Printed with a code easy to misread as GI3

One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.

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