hpfang+/- http://www.championmicro.com.tw hp power supply fan controller data sheet 2013/01/17 rev. 1.2 champion microelectronic corporation 1 general description: hpfang+/- is designed for hp related application. the target application is for the f an control section of hp pc power supply. it might infrin ge hp patent if the application is not relate to hp related business. hpfang+/- is designed to achieve high performance and high efficiency with low cost bom. with hpfang+/-, the application may reduce one fan. it combines pc motherboard temperature info rmation 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 in verting input of the op. the non-inverting input of teao op is connected to internal 2.5v 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 fanpwmout which corresponds with the fan speed at the temperature. when teao is greater than 3.5v, the fanpwmout duty cycle is 100%. when teao is ~ 2.5v, the fanpwmout duty cycle is ~50%. when teao is below 1.5v, the fanpwmout duty cycle is ~ 1.5%. usually, 50% duty cycle of fanpwmout corresponds to 50% power supply load at room temperature, and 5% duty cycle of fanpwmout corresponds to 20% power supply load at room temperature. to have fanpwmout ~ 50%, teao is ~2.5v. fancmd is represented as motherboard temperature information. fancmd usually is a 25khz pwming signal. the amplitude of fancmd needs to be greater than 1.5v and lower than 5v to work with hpfang+/-. hpfang+/- is inverting the complimentary duty cycle of fancmd to fanpwmout. fancmd duty cycle is ~ fanpwmout duty cycle. hpfang+/- selects the hig hest voltage among teao, caverage to compare with osc illator ramp, which is 1.5v to 3.5v. hpfang+/- design tool is available. please contact champion sales. features ? 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 25khz ramp generator: peak ~ 3.5v (duty ~100%) and valley ~1.5v (duty ~1.5%) ? precision 25khz ramp ge nerator compares teao, caverage, and fault to determine the duty cycle of fanpwmout ? it does not require negative voltage ? accept pulse pwming signal fancmd (prefer it is below 100khz) 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 pul se (fancmd), peak to peak can be from 0v - 5v to 0v - 2v ? minimum vcc > 8v power supply ? preferred vcc~ 12v ? precision (1% variation) 5v reference voltage ? precision internally generated 25khz +/-10% switching frequency ? fanpwmout 1.5% to 100% output duty cycle ? thermal shut down can be done by sensing tfb or teao ? low operating current, ivcc ~ 0.5ma ? hpfang+ : input signal fancmd 25% duty (+) output signal fancmd 25% duty (+) ? hpfang- : input signal fancmd 25% duty (-) output signal fancmd 75% duty (-) ? 8 pin package : dip & sop package
hpfang+/- http://www.championmicro.com.tw hp power supply fan controller data sheet 2013/01/17 rev. 1.2 champion microelectronic corporation 2 pin configuration dip-8 / sop-8 vcc 3 gnd 8 caverage 7 fanpwmout vref 5 fancmd 1 4 6 tfb teao 2 absolute maximum ratings absolute maximum ratings are those values beyo nd which the device could be permanently damaged. parameter min. max. units v cc 15 v teao 0 vcc+0.5 v tfb 0 vcc+0.5 v fanpwmout gnd ? 0.5 vcc+0.5 v i ref 5 ma caverage / fancmd 0 vcc+0.5 v peak fanpwmout current, source or sink 10 ma fanpwmout, energy per cycle 1.5 j junction temperature 150 storage temperature range -65 150 operating temperature range -40 125 lead temperature (soldering, 10 sec) 260 thermal resistance ( ja ) plastic dip plastic sop plastic tssop 80 105 105 /w /w /w ordering information part number temperature range package hpfang-xis* -40 to 125 sop-8 pin hpfang-xistr* -40 to 125 sop-8 pin hpfang+xis* -40 to 125 sop-8 pin hpfang+xistr* -40 to 125 sop-8 pin HPFANG-XIP* -40 to 125 dip-8 pin hpfang+xip* -40 to 125 dip-8 pin *note: x : suffix for halogen free and pb free product tr : package is typing reel
hpfang+/- http://www.championmicro.com.tw hp power supply fan controller data sheet 2013/01/17 rev. 1.2 champion microelectronic corporation 3 simplified block diagram (hpfang+/-) vcc 7 u1 - + . op - + . caverage 4 pwm cmp - + . + clk osc vref 8 vcc gnd 5 teao 1 s r q q fancmd 3 2.5v 1.5v u1 - + . u1 + - . fanpwmout 6 op + - . hpfang+ = 1.5v hpfang- = u2 1.5v u3 5.0v tfb 2 pin description operating voltage pin no. symbol description min. typ. max. unit 1 teao fan controller?s op output which is one of fanpwmout duty control signal 0 4.3 v 2 tfb fan controller?s op inverting input. it is power supply temperature signal 2.5 v 3 fancmd 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 fanpwmout duty 1.5 5 v 4 caverage averaged fancmd signal. it is one of fanpwmout duty control signal 1.375 3.625 v 5 gnd ground 0 v 6 fanpwmout controller output 0 5.7 v 7 vcc positive supply 8 15 v 8 vref maximum 3ma buffered output for the internal 5v reference when vcc=12v 5
hpfang+/- http://www.championmicro.com.tw hp power supply fan controller data sheet 2013/01/17 rev. 1.2 champion microelectronic corporation 4 electrical characteristics: unless otherwise stated, these sp ecifications apply vcc=+12v, c vref = 0.1uf, t a =operating temperature range (note1) hpfang+/- symbol parameter test conditions min. typ. max. unit supply vcc input voltage range 8 12 15 v vcc operating current 12v, c l = 0 0.45 ma voltage error amplifier output (teao) input voltage range 0 3 v tfb feedback reference voltage teao = tfb, t a = 25 , 2.475 2.5 2.525 v input bias current note 2, note 3 -1.0 -0.05 5 , iteao sourcing =1ma 4.0 v output low voltage t a = 25 , iteao sinking =1ma 0.65 1 v output sourcing current teao = tfb,t a = 2 5 , iteao sourcing =1ma 2.475 2.5 2.525 v output sinking current teao = tfb,t a = 25 , iteao sinking =1ma 2.475 2.5 2.525 v open loop gain dc gain 110 db power supply rejection ratio 10v < v cc < 12v 135 db fanpwmout duty vs teao voltage teao~1.5v 10v < v cc < 12v, t a = 25 , teao=1.5v 1.5 5 % teao~2.5v 10v < v cc < 12v, t a = 25 , teao=2.5v 50 % teao~3.5v 10v < v cc < 12v, t a = 25 , teao=3.5v 100 % reference vref output voltage t a = 25 , i(vref) = 0ma 4.95 5 5.05 v line regulation 10v < v cc < 12v @ t=25 10 25 mv load regulation vcc=12v, 0ma < i(vref)< 3ma; t a =25 15 mv load regulation vcc=12v, 0ma< i(vref)< 3ma; t a =-40 ~85 30 50 mv temperature stability 0.4 % total variation line, load, temp 4.95 5.05 v long term stability t j = 125 , 1000hrs 5 25 mv
hpfang+/- http://www.championmicro.com.tw hp power supply fan controller data sheet 2013/01/17 rev. 1.2 champion microelectronic corporation 5 electrical characteristics: unless otherwise stated, these sp ecifications apply vcc=+12v, c vref = 0.1uf, t a =operating temperature range (note1) hpfang+/- symbol parameter test conditions min. typ. max. unit fanpwmout matching test hpfan(+/-) fanpwmout duty input signal fancmd 15khz 50% duty (+/-) 45 50 55 % hpfan(+/-) fanpwmout duty input signal fancmd 25khz 50% duty (+/-) 45 50 55 % hpfan(+/-) fanpwmout duty input signal fancmd 35khz 50% duty (+/-) 45 50 55 % hpfan(-) fanpwmout duty input signal fancmd 25khz 25% duty (-) 70 75 80 % hpfan(+) fanpwmout duty input signal fancmd 25khz 25% duty (+) 20 25 30 % hpfan(-) fanpwmout duty input signal fancmd 25khz 75% duty (-) 20 25 30 % hpfan(+) fanpwmout duty input signal fancmd 25khz 75% duty (+) 70 75 80 % internal oscillator (measuring fanpwmout) frequency t a = 25 22.5 25 27.5 khz ramp peak to peak voltage 10v < v cc < 12v 2 v ramp peak high voltage 10v < v cc < 12v 3.5 v ramp peak low voltage 10v < v cc < 12v 1.5 v voltage stability 10v < v cc < 12v 2 % temperature stability 2 % total variation vcc=10v~12v, 0ma 1.5v minimum duty cycle tfb>2.5v and fancmd>1.5v (for hpfan-), 1.5 % fancmd<1.5v maximum duty cycle tfb<2.5v and fancmd<1.5v (for hpfan-) , , 100 % output low rdson i out = -5ma @ t a =25 vcc=12v 80 ohm rise/fall time (note 3) c l = 100pf @ t a =25 50 ns output high voltage t a = 2 5 , ifanpwmout sourcing =5ma 4.5 5 v note 1: limits are guaranteed by 100% testing, sampli ng, or correlation with worst-case test conditions. note 2: includes all bias currents to other circuits connected to the v fb pin. note 3: guaranteed by design, not 100% production test.
hpfang+/- http://www.championmicro.com.tw hp power supply fan controller data sheet 2013/01/17 rev. 1.2 champion microelectronic corporation 6 description functional description hpfang+/- is a fan control with an internal vref=5v and maximum iref=2.5ma current sourcing ability reference voltage/current . hpfang+/- operates at 25khz and the duty cycle ranges from 1.5% to 100%. it transfers input pwming command signal, thermal signal to fan control signal. hpfang+/- 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, whic h is represented by rthermist or and then generates signal teao. it is an internal compensated op. it feedback resistor rf (see fi gure 1.) needs to be calculated respect to the chosen spec of thermal resistor r thermister error amplifier output teao is one of signal s, which decides fanpwmout duty cycle, and finally decides the fan speed. as power supply load increase, r thermister reduce, teao increae, fanpwmout duty in crease, then the fan speed increases. figure 1. fanpwmout control circuit r10 0.5k rf housekeeping tach cn1 con2 1 2 ufan fan1 1 2 3 4 r6 10 r4 100k r5 10 rs r7 0 c4 0.1uf r9 cn2 con2 1 2 npn rt r8 c3 0.01uf c2 47uf/25v r3 10k r2 4k r1 15k rc c1 0.01uf u1 hpfang 2 1 3 4 5 6 7 8 tfb te ao fancmd caverage gnd fanpwmout vcc vre f vcc
hpfang+/- http://www.championmicro.com.tw hp power supply fan controller data sheet 2013/01/17 rev. 1.2 champion microelectronic corporation 7 calculation of thermal resistor rthermositer and error amplifier feedback resistor rf (figure 1.) thermal resistor and error amplifier feedback resistor relationship full speed rpm 50% load half speed rpm minimum speed rpm application circuit (hpfang+/-) r10 0.5k rf housekeeping tach cn1 con2 1 2 ufan fan1 1 2 3 4 r6 10 r4 100k r5 10 rs r7 0 c4 0.1uf r9 cn2 con2 1 2 npn rt r8 c3 0.01uf c2 47uf/25v r3 10k r2 4k r1 15k rc c1 0.01uf u1 hpfang 2 1 3 4 5 6 7 8 tfb te ao fancmd caverage gnd fanpwmout vcc vre f vcc % 50 5 . 2 ~ 5 . 2 5 . 2 5 . 2 ) 5 . 2 5 ( duty v teao when rseries rthemistor v rf v v rc v v + = ? + ? rseries rthemistor tfb rf tfb teao rc tfb vref + = ? + ? ) ( % 100 5 . 3 ~ 5 . 2 5 . 2 5 . 3 ) 5 . 2 5 ( duty v teao when rseries rthemistor v rf v v rc v v + = ? + ? % 5 5 . 1 ~ 5 . 2 5 . 2 5 . 1 ) 5 . 2 5 ( < + = ? + ? duty v teao when rseries rthemistor v rf v v rc v v
hpfang+/- http://www.championmicro.com.tw hp power supply fan controller data sheet 2013/01/17 rev. 1.2 champion microelectronic corporation 8 package dimension 8-pin dip (d8) 8-pin sop (s8)
hpfang+/- http://www.championmicro.com.tw hp power supply fan controller data sheet 2013/01/17 rev. 1.2 champion microelectronic corporation 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. cm c integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support 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 5f, no. 11, park avenue ii, science-based industrial park, hsinchu city, taiwan 21f., no. 96, sec. 1, sintai 5th rd., sijhih city, taipei county 22102, taiwan r.o.c t e l : +886-3-567 9979 t e l : +886-2-2696 3558 f a x : +886-3-567 9909 f a x : +886-2-2696 3559 http://www.champion-micro.com
|
