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.

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.

APPLICATIONs
- PC Power.
- DC Fan