AP438SL

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. Ground OTP 1 VCC 2 VIN 3 PWM 4 8 GND AP439 7 GND 6 GND 5 GND GND PWM VIN VCC OTP VCC GND SIP-4L VIN PWM Ordering Information AP439 Part Number 8 9 : AP438 : AP439 AP43 X X X X Package Lead Free Packing Blank : Tube or bulk A : Taping P : SIP-4/5L Blank : Normal S : SOP-8L L : Lead Free Package SOP-8L SIP-5L This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev.0.5 Feb.12, 2004 1/8 AP438/9 PWM Fan Speed Controller Block Diagrams VCC compartor + OTP Oscillator VIN + PWM compartor PWM GND Absolute Maximum Ratings Symbol VCC VIN OTP PWM PD PD TST TOP VOP Supply Voltage Input voltage Over temperature output. Output voltage to Ground Power dissipation (SIP-4/5L) Power dissipation (SOP-8L) Storage temperature range Operating temperature range Operating voltage range Parameter Rating 20 20 20 20 0.5 0.8 -65 to 150 0 to +85 7.0 to 18 Unit V V V V W W o o C C V Anachip Corp. www.anachip.com.tw 2/8 Rev.0.5 Feb.12, 2004 AP438/9 PWM Fan Speed Controller Electrical Characteristics Unless otherwise specified, guaranteed for Tj=25 C , VCC=12V . O Symbol VCC IIN VIN DUTY VIN(OTP) VIN(Release) VIN(HS) VIN(PWM0) VIN(PWM100) IS VPWM(ON) IPWM VOTP(L) IOTP FOSC Parameter Supply Voltage Input Bias Current(VIN Pin) Input Voltage Range PWM duty cycle range OTP Detect Voltage OTP release Voltage OTP detect Voltage Hysteresis Max Input voltage of 0% PWM Min Input voltage of 100% PWM Supply Current PWM transistor ON voltage Max. sink current OTP low level voltage Max. sink current OSC Frequency Conditions VIN=2.0V, Min. 7.0 0.5 0 0 3.3 2.65 450 0.75 2.80 Typ. 2 Max. 18 7 VCC-0.5 100 3.5 2.85 850 0.85 2.90 1.3 0.6 38 Units V uA V % V V mV V V mA V mA V mA Khz Output floating IPWM=500mA continued 500 IOTP=20mA 20 0OC