HPFANG+/- GENERAL DESCRIPTION FEATURES. HP Power Supply Fan Controller DATA SHEET.

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1 GENERAL DESCRIPTION FEATURES is designed for HP related application The target application is for the Fan Control Section of HP PC Power Supply It might infringe HP patent if the application is not relate to HP related business is designed to achieve high performance and high efficiency with low cost BOM With, the application may reduce one FAN It combines PC motherboard temperature information and the temperature information of PC power supply The temperature information of PC power supply is an analog signal called TFB, which can be generated by a simple Thermistor The temperature information of PC motherboard usually is presented by the duty cycle of the signal called FANCMD TEAO and TFB are output and inverting input of the OP The noninverting input of TEAO OP is connected to internal V reference A simple inverting gain configuration with a thermistor in series of a current limit resistor Rs can program the TEAO to search for the duty cycle of which corresponds with the fan speed at the temperature When TEAO is greater than V, the duty cycle is 00% When TEAO is ~ V, the duty cycle is ~0% When TEAO is below V, the duty cycle is ~ % Usually, 0% duty cycle of corresponds to 0% Power Supply load at room temperature, and % duty cycle of corresponds to 0% Power Supply load at room temperature To have ~ 0%, TEAO is ~V Combine Mother Board Temperature Signals with Power Supply Temperature Signals Low BOM and It may reduce one Fan Precision OP (TEAO) uses TFB to sense the thermistor information at power supply Precision KHz Ramp generator: Peak ~ V (Duty ~00%) and Valley ~V (Duty ~%) Precision KHz Ramp generator compares TEAO, Caverage, and Fault to determine the duty cycle of It does not require negative voltage Accept Pulse PWMing signal FANCMD (prefer it is below 00Khz) from Mother Board Precision Duty to Duty Converter or called a Pulse to Pulse Converter or called PWMing to PWMing Converter The amplitude of Input pulse (FANCMD), peak to peak can be from 0V V to 0V V Minimum > 8V Power Supply Preferred ~ V Precision (% variation) V Reference Voltage Precision Internally Generated KHz /0% Switching Frequency % to 00% Output Duty Cycle FANCMD is represented as motherboard temperature information FANCMD usually is a KHz PWMing signal The amplitude of FANCMD needs to be greater than V and lower than V to work with is inverting the complimentary duty cycle of FANCMD to FANCMD duty cycle is ~ duty cycle Thermal Shut Down can be done by sensing TFB or TEAO Low Operating Current, Ivcc ~ 0mA HPFANG : Input Signal FANCMD % Duty () Output Signal FANCMD % Duty () HPFANG : Input Signal FANCMD % Duty () Output Signal FANCMD % Duty () selects the highest voltage among TEAO, CAVERAGE to compare with oscillator ramp, which is V to V 8 pin package : DIP & SOP Package design tool is available Please contact Champion Sales 0/0/ Rev Champion Microelectronic Corporation

2 PIN CONFIGURATION DIP8 / SOP8 TEAO VREF 8 TFB FANCMD 6 CAVERAGE GND ABSOLUTE MAXIMUM RATINGS Absolute Maximum ratings are those values beyond which the device could be permanently damaged Parameter Min Max Units V CC 8 V TEAO 0 V TFB 0 0 V GND 0 V I REF ma CAVERAGE / FANCMD 0 V Peak Current, Source or Sink 0 ma, Energy Per Cycle μ J Junction Temperature 0 Storage Temperature Range 6 0 Operating Temperature Range 0 Lead Temperature (Soldering, 0 sec) 60 Thermal Resistance (θ JA ) Plastic DIP Plastic SOP Plastic TSSOP /W /W /W ORDERING INFORMATION Part Number Temperature Range Package HPFANGXIS* 0 to SOP8 Pin HPFANGXISTR* 0 to SOP8 Pin HPFANGXIS* 0 to SOP8 Pin HPFANGXISTR* 0 to SOP8 Pin HPFANGXIP* 0 to DIP8 Pin HPFANGXIP* 0 to DIP8 Pin *Note: X : Suffix for Halogen Free and PB Free Product TR : Package is Taping Reel 0/0/ Rev Champion Microelectronic Corporation

3 SIMPLIFIED BLOCK DIAGRAM () OSC U 0V OP 8 VREF TEAO TFB V U OP CLK PWM CMP S R Q Q 6 GND FANCMD CAVERAGE HPFANG = U V V U HPFANG = V U PIN DESCRIPTION Pin No Symbol Description Operating Voltage Min Typ Max Unit TEAO TFB FANCMD CAVERAGE Fan Controller s OP Output which is one of duty control signal Fan controller s OP inverting Input It is power supply temperature signal Motherboard Temperature signal It can be a variable speed and variable value PWM input signal It is converted to an average signal and then controls duty Averaged FANCMD signal It is one of duty control signal 0 V V V 6 V GND Ground 0 V 6 Controller Output 0 V Positive Supply 8 V 8 VREF Maximum ma buffered output for the internal V reference when =V 0/0/ Rev Champion Microelectronic Corporation

4 ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply Vcc=V, C VREF = 0uF, T A =Operating Temperature Range (Note) Symbol Parameter Test Conditions Supply Min Typ Max Unit Input Voltage Range 8 V Operating Current V, C L = 0 0 ma Voltage Error Amplifier Output (TEAO) Input Voltage Range 0 V TFB Feedback Reference Voltage TEAO = TFB, T A =, V Input Bias Current Note, Note 0 00 μ A Output High Voltage T A =, ITEAOSOURCING=mA 0 V Output Low Voltage T A =, ITEAOSINKING=mA 06 V Output Sourcing Current TEAO = TFB,T A =, ITEAOSOURCING=mA V Output Sinking Current TEAO = TFB,T A =, ITEAOSINKING=mA V Open Loop Gain DC gain 0 db Power Supply Rejection Ratio 0V < V CC < V db vs TEAO voltage TEAO~V 0V < V CC < V, T A =, TEAO=V % TEAO~V 0V < V CC < V, T A =, TEAO=V 0 % TEAO~V 0V < V CC < V, T A =, TEAO=V 00 % Reference VREF Output Voltage T A =, I(VREF) = 0mA 9 0 V Line Regulation 0V < V CC < T= 0 mv Load Regulation =V, 0mA < I(VREF)< ma; T A = mv Load Regulation =V, 0mA< I(VREF)< ma; T A =0 ~8 0 0 mv Temperature Stability 0 % Total Variation Line, Load, Temp 9 0 V Long Term Stability T J =, 000HRs mv 0/0/ Rev Champion Microelectronic Corporation

5 ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply Vcc=V, C VREF = 0uF, T A =Operating Temperature Range (Note) Symbol Parameter Test Conditions Matching Test Min Typ Max Unit HPFAN(/) INPUT SIGNAL FANCMD KHz 0% Duty (/) 0 % HPFAN(/) INPUT SIGNAL FANCMD KHz 0% Duty (/) 0 % HPFAN(/) INPUT SIGNAL FANCMD KHz 0% Duty (/) 0 % HPFAN() INPUT SIGNAL FANCMD KHz % Duty () 0 80 % HPFAN() INPUT SIGNAL FANCMD KHz % Duty () 0 0 % HPFAN() INPUT SIGNAL FANCMD KHz % Duty () 0 0 % HPFAN() INPUT SIGNAL FANCMD KHz % Duty () 0 80 % Internal Oscillator (Measuring ) Frequency T A = khz Ramp Peak to Peak Voltage 0V < V CC < V V Ramp Peak High Voltage 0V < V CC < V V Ramp Peak Low Voltage 0V < V CC < V V Voltage Stability 0V < V CC < V % Temperature Stability % Total Variation =0V~V, 0mA <I(VREF)< ma; T A = 0 ~8 khz FANCMD / Dead Time 8 us FANCMD Threshold Voltage TFB=6V, 8 V FANCMD>V Minimum Duty Cycle TFB>V and FANCMD>V (For HPFAN), % FANCMD<V Maximum Duty Cycle TFB<V and FANCMD<V (For HPFAN),, 00 % Output Low Rdson I OUT = T A = Vcc=V 80 ohm Rise/Fall Time (Note ) C L = T A = 0 ns Output High Voltage T A =, ISOURCING=mA V Note : Limits are guaranteed by 00% testing, sampling, or correlation with worstcase test conditions Note : Includes all bias currents to other circuits connected to the V FB pin Note : Guaranteed by design, not 00% production test 0/0/ Rev Champion Microelectronic Corporation

6 Description Functional Description is a Fan control with an internal VREF=V and maximum IREF=mA current sourcing ability reference voltage/current operates at KHz and the duty cycle ranges from % to 00% It transfers input PWMing command signal, thermal signal to fan control signal combines thermal signal, which is from power supply load, represented by Rthermister, and motherboard temperature signal, represented by FANCMD, to generate fan control signal It features high efficiency, larger variable range speed, and low cost Error Amplifier Output TEAO Error Amplifier receives power supply load information, which is represented by Rthermistor and then generates signal TEAO It is an internal compensated OP It feedback resistor RF (see figure ) needs to be calculated respect to the chosen SPEC of thermal resistor RTHERMISTER Error Amplifier output TEAO is one of signals, which decides duty cycle, and finally decides the fan speed As power supply load increase, RTHERMISTER reduce, TEAO increae, duty increase, then the FAN speed increases Figure Control Circuit FAN R0 0K TACH Rc Rt Rs R K R 00K CN Rf R K R 0 CON R 0 C 0uF U HPFANG TEAO VREF 8 TFB FANCMD CAVERAGE GND 6 HouseKeeping R8 C 00uF R6 0 R 0K C C 00uF uf/v UFan CN CON R9 NPN 0/0/ Rev Champion Microelectronic Corporation 6

7 Calculation of Thermal Resistor RTHERMOSITER and Error Amplifier Feedback Resistor RF (Figure ) Thermal Resistor and Error Amplifier Feedback Resistor Relationship ( VREF TFB) TEAO TFB Rc Rf = TFB Rthemistor Rseries Full Speed RPM 0% Load (V V ) V V Rc Rf = V Rthemistor Rseries When TEAO ~ V Duty00% Half Speed RPM (V V ) V V Rc Rf = V Rthemistor Rseries When TEAO ~ V Duty0% Minimum Speed RPM (V V ) V V Rc Rf = V Rthemistor Rseries When TEAO ~ V Duty < % APPLICATION CIRCUIT () FAN R0 0K TACH Rc Rt Rs R K R 00K CN Rf R K R 0 CON R 0 C 0uF U HPFANG TEAO VREF 8 TFB FANCMD CAVERAGE GND 6 HouseKeeping R8 C 00uF R6 0 R 0K C C 00uF uf/v UFan CN CON R9 NPN 0/0/ Rev Champion Microelectronic Corporation

8 PACKAGE DIMENSION 8PIN DIP (D8) 8PIN SOP (S8) 0/0/ Rev Champion Microelectronic Corporation 8

9 IMPORTANT NOTICE Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage CMC integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in lifesupport applications, devices or systems or other critical applications Use of CMC products in such applications is understood to be fully at the risk of the customer In order to minimize risks associated with the customer s applications, the customer should provide adequate design and operating safeguards HsinChu Headquarter Sales & Marketing F, No, Park Avenue II, ScienceBased Industrial Park, HsinChu City, Taiwan F, No 96, Sec, Sintai th Rd, Sijhih City, Taipei County 0, Taiwan ROC T E L : T E L : FAX: F A X : /0/ Rev Champion Microelectronic Corporation 9