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AP438 - PWM Fan Speed Controller

Download the AP438 datasheet PDF. This datasheet also covers the AP439 variant, as both devices belong to the same pwm fan speed controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The AP438/9 series’s PWM output has built-in NPN power transistor that controls the Fan current & Fan speed.

AP439 built-in over temperature alarm flag.

- PC Power.

Pin Assignment Front View AP438 Pin Descriptions Name VCC VIN OTP PWM GND Descr

Key Features

  • s - Built-in 30Khz OSC provide 0%~100% PWM output - Over Temperature Protector(OTP) flag. (AP439 only). - Open collect output(OTP & PWM pins). - SIP-4L package for AP438. - SIP-5L, SOP-8L package for AP439.
  • General.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AP439_Anachip.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number AP438
Manufacturer Anachip
File Size 178.46 KB
Description PWM Fan Speed Controller
Datasheet download datasheet AP438 Datasheet

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Other Datasheets by Anachip

Part Number Description
AP431 Adjustable Precision Shunt Regulator
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AP439 PWM Fan Speed Controller
AP450 2 Channel Linear Controller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
www.DataSheet4U.com AP438/9 PWM Fan Speed Controller „ Features - Built-in 30Khz OSC provide 0%~100% PWM output - Over Temperature Protector(OTP) flag. (AP439 only). - Open collect output(OTP & PWM pins). - SIP-4L package for AP438. - SIP-5L, SOP-8L package for AP439. „ General Descriptions The AP438/9 series’s PWM output has built-in NPN power transistor that controls the Fan current & Fan speed. AP439 built-in over temperature alarm flag. „ Applications - PC Power. - DC Fan „ Pin Assignment Front View AP438 „ Pin Descriptions Name VCC VIN OTP PWM GND Description Operating voltage input Reference input voltage Over Temperature protect flag. PWM Open Collect Output.