SMD code FW1
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.
The only part printed FW1 in our tables
FP6397S6
- What it is
- DC-DC converter
- Maker
- Fitipower
- Package
- SOT-23-6
- Pins
- 6
- Details
- High Efficiency 1MHz 2A Synchronous Step Down Converter Applications ADSL/VDSL 集線器 數位(智能)電視 纜線數據機 智能門鎖 掃地機器人 POS機 電子書
- Source
- Manufacturer datasheet
Is it dead?
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.
Was it this one?
Codes that begin with FW1
For a marking with its end worn or burnt off. Each code has a page of its own.
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