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?2006 fairchild semiconductor corporation 1 www.fairchildsemi.com march 2006 fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) fsdh0170rnb/fsdh0270rnb/FSDH0370RNB green mode fairchild power switch (fps?) features ? internal avalanche rugged 700v sense fet ? consumes only 0.8w at 230 vac & 0.5w load with burst-mode operation ? frequency modulation for emi reduction ? precision fixed operating frequency, 100khz ? internal start-up circui t and built-in soft start ? pulse-by-pulse current limiting and auto-restart mode ? over voltage protection (ovp), over load protection (olp), internal thermal shutdown function (tsd) ? under voltage lockout (uvlo) ? low operating current (3ma) ? adjustable peak current limit applications ? auxiliary power supply for pc and server ? smps for vcr, svr, stb, dvd & dvcd player ? smps for printer, facsimile & scanner ? adapter for camcorder related application notes ? an-4137, an-4141, an-4147 (flyback) ? an-4134 (forward) description the fsdh0170rnb/fsdh0270rnb/FSDH0370RNB consists of an integrated current mode pulse width mod- ulator (pwm) and an avalanche rugged 700v sense fet. it is specifically designed for high performance off- line switch mode power supplies (smps) with minimal external components. the integrated pwm controller features include : a fixed oscillator with frequency mod- ulation for reduced emi, under voltage lock out (uvlo) protection, leading edge blanking (leb), an optimized gate turn-on/ turn-off driver, thermal shut down (tsd) protection, and temperature compensated precision cur- rent sources for loop compensation and fault protection circuitry. compared to a discrete mosfet and controller or rcc switching converter solution, the fsdh0170rnb/ fsdh0270rnb/FSDH0370RNB reduces total compo- nent count, design size, and weight while increasing efficiency, productivity, a nd system reliability. these devices provide a basic platform that is well suited for the design of cost-effective fl yback converters, as in pc auxiliary power supplies. ordering information product number package marking code bv dss f osc r ds(on) (max.) fsdh0170rnb 8dip dh0170r 700v 100khz 11 fsdh0270rnb 8dip dh0270r 700v 100khz 7.2 FSDH0370RNB 8dip dh0370r 700v 100khz 4.75
2 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) typical circuit figure 1. typical flyback application output power table (4) notes: 1. typical continuous power in a non-vent ilated enclosed adapter with sufficient drain pattern as a heat sinker, at 50 c ambient. 2. maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sinker, at 50 c ambient. 3. 230 vac or 100/115 vac with doubler. 4. the maximum output power can be limited by junction temperature. internal block diagram figure 2. functional block diagram of fsdh0170rnb/fsdh0270rnb/FSDH0370RNB product 230vac 15% (3) 85?265vac adapter (1) open frame (2) adapter (1) open frame (2) fsdh0170rnb 14w 20w 9w 13w fsdh0270rnb 17w 24w 11w 16w FSDH0370RNB 20w 27w 13w 19w drain source vstr vfb vcc pwm ac in dc out ipk 8v/12v 2 6,7,8 1 3 vref internal bias s q q r osc vcc vcc i delay i fb v sd tsd vovp vcc soft start s q q r r 2.5r vcc good vcc drain vfb gnd gate driver 5 vstr i ch vcc good v burl /v burh leb 4 ipk freq. modulation burst normal pwm
3 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) pin configuration figure 3. pin configuration (top view) pin definitions pin number pin name pin function description 1 gnd sense fet source terminal on primary side and internal control ground. 2 vcc positive supply voltage input. although connected to an auxiliary transformer winding, current is supplied from pin 5 (vstr) via an internal switch during startup (see internal block diagram se ction). it is not until vcc reaches the uvlo upper threshold (12v) that the internal start-up switch opens and device power is supplied via the auxiliary transformer winding. 3 vfb the feedback voltage pin is the non-inverting input to the pwm comparator. it has a 0.9ma current source connected internally while a capacitor and optocoupler are typically connected externally. a feedback voltage of 6v triggers overload protection (olp). there is a time delay while charging external capacitor cfb from 3v to 6v using an internal 5a current source. this time delay prevents false trigge ring under transient conditions but still allows the protection mechanism to o perate under true overload conditions. 4 ipk this pin adjusts the peak current limi t of the sense fet. the 0.9ma feedback current source is diverted to the para llel combination of an internal 2.8k resistor and any external resistor to gnd on this pin. this determines the peak current limit. if this pin is tied to vcc or left floating, the typical peak current limit will be 0.8a (fsdh0170r nb), 0.9a (fsdh0270rnb), or 1.1a (FSDH0370RNB). 5 vstr this pin connects to the rectified ac line voltage source. at start-up the internal switch supplies internal bias and charges an external storage capacitor placed between the vcc pin and ground. once the vcc reaches 12v, the internal switch is opened. 6, 7, 8 drain the drain pins are designed to co nnect directly to the primary lead of the transformer and are capable of switching a maximum of 700v. minimizing the length of the trace connecting these pins to the transformer will decrease leakage inductance. 1 2 3 45 6 7 8 gnd vcc vfb ipk vstr drain drain drain 8dip
4 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) absolute maximum ratings (t a = 25c, unless otherwise specified) thermal impedance (t a = 25 c, unless otherwise specified) all items are tested with the standards jesd 51-2 and 51-10 (dip). notes: 5. non-repetitive rating: pulse width is li mited by maximum junction temperature. 6. l = 51mh, starting tj = 25 c. 7. free standing with no heatsink; without copper clad. 8. measured on the drain pin close to plastic interface. 9. measured on the pkg top surface. symbol parameter value unit v drain drain pin voltage 700 v v str vstr pin voltage 700 v i dm drain current pulsed 5 fsdh0170rnb 4 a fsdh0270rnb 8 a FSDH0370RNB 12 a e as single pulsed avalanche energy 6 fsdh0170rnb 50 mj fsdh0270rnb 140 mj FSDH0370RNB 230 mj v cc supply voltage 20 v v fb feedback voltage range -0.3 to v cc v p d total power dissipation 1.5 w t j operating junction temperature internally limited c t a operating ambient temperature -25 to +85 c t stg storage temperature -55 to +150 c symbol parameter value unit 8 dip ja junction-to-ambient thermal 7 80 c/w jc junction-to-case thermal 8 20 c/w jt junction-to-top thermal 9 35 c/w
5 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) electrical characteristics (t a = 25 c unless otherwise specified) symbol parameter condition min. typ. max. unit sense fet section 11 i dss zero-gate-voltage drain current v ds = 700v, v gs = 0v ? ? 50 a v ds = 560v, v gs = 0v, t c = 125 c ? ? 200 r ds(on) drain-source on-state resistance 10 fsdh0170rnb v gs = 10v, i d = 0.5a ? 8.8 11 fsdh0270rnb ? 6.0 7.2 FSDH0370RNB ? 4.0 4.75 c iss input capacitance fsdh0170rnb v gs = 0v, v ds = 25v, f = 1mhz ?250? pf fsdh0270rnb ? 550 ? FSDH0370RNB ? 315 ? c oss output capacitance fsdh0170rnb ? 25 ? fsdh0270rnb ?38? FSDH0370RNB ?47? c rss reverse transfer capacitance fsdh0170rnb ?10? fsdh0270rnb ?17? FSDH0370RNB ? 9 ? t d(on) turn-on delay time fsdh0170rnb v ds = 350v, i d = 1.0a ? 12 ? ns fsdh0270rnb ?20? FSDH0370RNB ? 11.2 ? t r rise time fsdh0170rnb ? 4 ? fsdh0270rnb ?15? FSDH0370RNB ?34? t d(off) turn-off delay time fsdh0170rnb ? 30 ? fsdh0270rnb ?55? FSDH0370RNB ? 28.2 ? t f fall time fsdh0170rnb ? 10 ? fsdh0270rnb ?25? FSDH0370RNB ?32? control section f osc switching frequency 92 100 108 khz f mod switching frequency modulation 2 3 4 khz f osc switching frequency variation 11 -25 c t a 85 c?5 10 % d max maximum duty cycle measured @0.1 x vds 62 67 72 % d min minimum duty cycle 0 0 0 % v start uvlo threshold voltage v fb = gnd 11 12 13 v v stop v fb = gnd 7 8 9 i fb feedback source current v fb = gnd 0.7 0.9 1.1 ma t s/s internal soft start time 11 v fb = 4v ?10?ms
6 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) electrical characteristics (continued) (t a = 25 c unless otherwise specified) notes: 10. pulse test : pulse width 300s, duty 2% 11. these parameters, although guaranteed, are not 100% tested in production. symbol parameter condition min. typ. max. unit burst mode section v burh burst mode voltage tj = 25 c0.50.60.7v v burl 0.3 0.4 0.5 v v bur(hys) 100 200 300 mv protection section i lim peak current limit fsdh0170rnb di/dt = 170ma/s 0.70 0.80 0.90 a fsdh0270rnb di/dt = 200ma/s 0.79 0.90 1.01 FSDH0370RNB di/dt = 240ma/s 0.97 1.10 1.23 t cld current limit delay time 11 ?500 ? ns t sd thermal shutdown temperature 11 125 140 ? c v sd shutdown feedback voltage 5.5 6.0 6.5 v v ovp over voltage protection 18 19 ? v i delay shutdown delay current v fb = 4v 3.5 5.0 6.5 a t leb leading edge blanking time 11 200 ? ? ns total device section i op operating supply current (control part only) v cc = 14v 1 3 5 ma i ch start-up charging current v cc = 0v 0.70.851.0 ma v str vstr supply voltage v cc = 0v ?24? v
7 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) typical performance charact eristics (control part) (these characteristic graphs are normalized at t a = 25c) 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 temp[ c] normalized operating frequency (fosc) vs. t a 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 temp[c] normalized frequency modulation ( f mod ) vs. t a 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 temp[c] normalized maximum duty cycle (d max ) vs. t a 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 temp[c] normalized operating supply current (i op ) vs. t a 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 temp[c] nomalized start threshold voltage (v start ) vs. t a 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 temp[c] normalized stop threshold voltage (v stop ) vs. t a
8 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) typical performan ce characteristics (continued) feedback source current (i fb ) vs. t a 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 temp[c] normalized peak current limit (i lim ) vs. t a start up charging current (i ch ) vs. t a over voltage protection (v ovp ) vs. t a 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 temp[c] normalized 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 temp[c] normalized 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 temp[c] normalized
9 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) functional description 1. startup: in previous generations of fairchild power switches (fps?) the vstr pin required an external resistor to the dc input voltage line. in this generation the startup resistor is r eplaced by an internal high voltage current source and a switch that shuts off 10ms after the supply voltage, vcc, goes above 12v. the source turns back on if vcc drops below 8v. figure 4. high voltage current source 2. feedback control: the 700v fps series employs current mode control, as shown in figure 5. an optocoupler (such as the h11a817a) and shunt regulator (such as the ka431) are typically used to implement the feedback network. comparing the feedback voltage with the voltage across the rsense resistor of sense fet plus an offset voltage makes it possible to control the swit ching duty cycle. when the ka431 reference pin voltage exceeds the internal reference voltage of 2.5v, the optocoupler led current increases, the feedback voltage vfb is pulled down and thereby reduces the duty cycle. this typically happens when the input voltage increases or the output load decreases. figure 5. pulse width modulation (pwm) circuit 3. leading edge blanking (leb): when the internal sense fet is turned on; the primary side capacitance and secondary side rectifier diode reverse recovery typically cause a high current spike through the sense fet. excessive voltage across the rsense resistor leads to incorrect feedback operation in the current mode pwm control. to counter this effect, the fps employs a leading edge blanking (leb) circuit. this circuit inhibits the pwm comparator for a short time (t leb ) after the sense fet is turned on. 4. protection circuits: the fps has several protective functions such as over load protection (olp), over voltage protection (ovp), under voltage lock out (uvlo), and thermal shut down (tsd). because these protection circuits are fully integrated inside the ic without external components, reliability is improved without increasing cost. once a fault condition occurs, switching is terminated and the sense fet remains off. this causes vcc to fall. when vcc reaches the uvlo stop voltage, v stop (typically 8v), the protection is reset and the internal high voltage current source charges the vcc capacitor via the vstr pin. when vcc reaches the uvlo start voltage, v start (typically 12v), the fps resumes its normal operation. in this manner, the auto- restart can alternately enable and disable the switching of the power sense fet unt il the fault condition is eliminated. 4.1 over load protection (olp): overload is defined as the load current exceeding a pre-set level due to an unexpected event. in this situ ation, the protection circuit should be activated in order to protect the smps. however, even when the smps is operating normally, the over load protection (o lp) circuit can be activated during the load transition. in order to avoid this undesired operation, the olp circuit is designed to be activated after a specified time to determine whether it is a transient situation or an overload situation. in conjunction with the ipk current limit pin (if used) the current mode feedback path would limit the current in the sense fet when the maximum pwm duty cycle is attained. if the output consumes more than this maximum power, the output voltage (vo) decreases below its nominal voltage. this reduces the current through the optocoupler led, which also reduces the optocoupler transistor current, thus increasing the feedback voltage (v fb ). if v fb exceeds 3v, the feedback input diode is blocked and the 5a current source (i delay ) starts to slowly charge cfb up to vcc. in this condition, v fb increases until it reaches 6v, when the switching operation is terminated as shown in figure 6. the shutdown delay time is the time required to charge cfb from 3v to 6v with 5a current source. vin,dc vstr vcc 10ms after vcc 12v uvlo off vcc<8v uvlo on i str j-fet i ch 3 osc vcc vcc 5ua 0.9ma v sd r 2.5r gate driver olp d1 d2 v fb vfb 431 c fb vo + - v fb,in
10 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) figure 6. over load protection (olp) 4.2 thermal shutdown (tsd) : the sense fet and the control ic are integrated, maki ng it easier for the control ic to detect the temperat ure of the sense fet. when the temperature exceeds approximately 140 c, thermal shutdown is activated. 4.3 over voltage protection (ovp): in the event of a malfunction in the secondary side feedback circuit, or an open feedback loop caused by a soldering defect, the current through the optocoupler transistor becomes almost zero (refer to figure 5). then, v fb climbs up in a similar manner to the overload situation, forcing the preset maximum current to be supplied to the smps until the overload protecti on is activated. because excess energy is provided to the output, the output voltage may exceed the rated voltage before the overload protection is acti vated, resulting in the breakdown of the devices in the secondary side. in order to prevent this situation, an over voltage protection (ovp) circuit is employed. in general, v cc is proportional to the output voltage and the fps uses v cc instead of directly monitoring the output voltage. if v cc exceeds 19v, ovp circuit is activated resulting in termination of the switching operation. in order to avoid undesired activation of ovp during normal operation, vcc should be designed to be below 19v. 5. soft start : the fps has an internal soft start circuit that slowly increases the sense fet current after startup as shown in figure 7. the typical soft start time is 10ms, where progressive increments of the sense fet current are allowed during the start-up phase. the pulse width to the power switching device is progressively increased to establish the correct working conditions for transformers, inductors, and capacitors. the voltage on the output capacitors is progressively increased with the intention of smoothly establishing the required output voltage. this also helps to prevent transformer saturation and reduce the stress on the secondary diode during startup. figure 7. soft start function 6. burst operation: in order to minimize power dissipation in standby mode, the fps enters burst mode operation. feedback volt age decreases as the load decreases and as shown in figure 8, the device automatically enters burst mode when the feedback voltage drops below v burh (typically 600mv). switching still continues until the feedback voltage drops below v burl (typically 400mv). at this point switching stops and the output voltage start to drop at a rate dependent on the standby current load . this causes the feedback voltage to rise. once it passes v burh , switching resumes. the feedback voltage then falls and the process is repeated. burst mode operation alternately enables and disables switching of the sense fet and reduces switching loss in standby mode. figure 8. burst operation function 7. frequency modulation : modulating the switching frequency of a switched power supply can reduce emi. frequency modulation can reduce emi by spreading the energy over a wider frequency range than the bandwidth measured by the emi test equipment. the amount of emi reduction is directly re lated to the depth of the reference frequency. as can be seen in figure 9, the frequency changes from 97khz to 103khz in 4ms for the 700v fps series. frequency modulation allows the use of a cost effective inductor instead of an ac input mode choke to satisfy the requirements of world wide emi limits. v fb t 3v 6v over load protection t 12 = c fb (v(t 2 )-v(t 1 )) / i delay t 1 t 2 v t v v t v a i i t v t v c t delay delay fb 6 ) ( , 3 ) ( , 5 ; ) ( ) ( 2 1 1 2 12 = = = ? = drain gnd r sense #6,7,8 #1 i lim 5v v burh switching off current waveform burst operation normal operation v fb v burl switching off burst operation
11 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) figure 9. frequency modulation waveform 8. adjusting peak current limit: as shown in figure 10, a combined 2.8k internal resistance is connected to the non-inverting lead on the pwm comparator. an external resistance of rx on the current limit pin forms a parallel resistance with the 2.8k when the internal diodes are biased by the main current source of 900a. figure 10. peak curre nt limit adjustment for example, fsdh0270rnb has a typical sense fet peak current limit (i lim ) of 0.9a. i lim can be adjusted to 0.6a by inserting rx between the ipk pin and the ground. the value of the rx can be estimated by the following equations: 0.9a : 0.6a = 2.8k : xk , x = rx || 2.8k . (x represents the resistance of the parallel network) t s f s =1/t s 100khz 103khz 97khz 4ms t drain current 3 vcc vcc i delay i fb 2k vfb pwm comparator 4 ipk 0.8k rx sensefet current sense 900ua 5ua
12 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) application tips 1. methods of reducing audible noise switching mode power converters have electronic and magnetic components, whic h generate audible noises when the operating frequency is in the range of 20~20,000hz. even though t hey operate above 20khz, they can make noise depending on the load condition. here are three methods to reduce noise: glue or varnish the most common method involves using glue or varnish to tighten magnetic components. the motion of core, bobbin, and coil and the chattering or magnetostriction of core can cause the transformer to produce audible noise. the use of rigid glue and varnish helps reduce the transformer noise. glue or varnish can also can crack the core because sudden changes in the ambient temperature cause the core and the glue to expand or shrink in a different ratio according to the temperature. ceramic capacitor using a film capacitor instead of a ceramic capacitor as a snubber capacitor is anothe r noise reduction solution. some dielectric materials show a piezoelectric effect depending on the electric field intensity. hence, a snubber capacitor becomes o ne of the most significant sources of audible noise. another consideration is to use a zener clamp circuit instead of an rcd snubber for higher efficiency as well as lower audible noise. adjusting sound frequency moving the fundamental frequency of noise out of 2~4khz range is the third method. generally, humans are more sensitive to noise in the range of 2~4khz. when the fundamental frequency of noise is located in this range, the noise sounds louder although the noise intensity level is identical. refer to figure 11. when fps acts in burst mode and the burst operation is suspected to be a source of noise, this method may be helpful. if the frequency of burst mode operation lies in the range of 2~4khz, adjusting the feedback loop can shift the burst operation frequency. in order to reduce the burst operation frequency, increase a feedback gain capacitor (c f ), optocoupler supply resistor (r d ) and feedback capacitor (c b ) and decrease a feedback gain resistor (r f ) as shown in figure 12. figure 11. equal loudness curves figure 12. typical feedback network of fps 2. other reference materials an-4134 : design guidelines for off-line forward converters using fairchild power switch (fps?) an-4137 :design guidelines for off-line flyback converters using fairchild power switch (fps) an-4140 : transformer design co nsideration for off-line flyback converters using fa irchild power switch (fps?) an-4141 : troubleshooting and design tips for fairchild power switch (fps?) flyback applications an-4147 : design guidelines for rcd snubber of flyback an-4148 : audible noise reduction techniques for fps applications
13 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) typical application circuit features ? high efficiency (> 78% at 115 vac and 230 vac input) ? low standby mode power consumption (< 0.8w at 230 vac input and 0.5w load) ? enhanced system reliability through various protection functions ? low emi through frequency modulation ? internal soft-start (10ms) ? line uvlo function can be achieved using external component key design notes ? the delay time for overload protection is designed to be about 30ms with c8 of 47nf. if faster/slower trig- gering of olp is required, c8 can be changed to a smaller/larger value (e.g. 100nf for about 60ms). ? zp1, dl1, rl1, rl2, rl3, rl4, rl5, rl7, ql1, ql2, and cl9 build a line under voltage lock out block (uvlo). the zener voltage of zp1 determines the input voltage which makes fps turn on. rl5 and dl1 provide a reference voltage from v cc . if the input volt- age divided by rl1, rl2, and rl4 is lower than the zener voltage of dl1, ql1 and ql2 turn on and pull down vfb to ground. ? this evaluation board and corresponding test report can be provided. application output power input voltage output voltage (max current) pc auxiliary power supply (using fsdh0270rnb) 15w universal input (85?265 vac) 5v (3a)
14 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) 1. schematic c4 1000uf 16v c4 1000uf 16v j1 fb j1 fb 1 2 u1a h11a817 u1a h11a817 ql2 ksp2222a ql2 ksp2222a l3 0 l3 0 d4 1n4007 d4 1n4007 r13 open r13 open cl9 10uf 50v r9 10k r9 10k j4 0 j4 0 l2 1uh l2 1uh r2 4.7k r2 4.7k c10 1nf 250v c10 1nf 250v d5 1n4007 d5 1n4007 j5 open j5 open zd1 open zd1 open 1 6 3 10 4 5 t1 ee2229 t1 ee2229 ds1 1n4007 ds1 1n4007 gnd 1 vcc 2 vfb 3 ipk 4 drain 8 drain 7 drain 6 vstr 5 u3 fsdh0x70rnb zds1 p6ke180a zds1 p6ke180a c6 47nf c6 47nf j3 open j3 open r14 30 r14 30 2 3 1 u2 tl431a u2 tl431a j2 0 j2 0 r11 1.2k 1% r11 1.2k 1% rl4 120k r8 open r8 open 3 4 u1b h11a817 u1b h11a817 1 2 con2 output con2 output c2 22uf 400v c2 22uf 400v rl7 40k rl7 40k r5 1.2k 1% r5 1.2k 1% r6 2.4 1w r6 2.4 1w zd2 open zd2 open r10 2 r10 2 1 2 3 con1 input con1 input d6 1n4007 d6 1n4007 c8 47nf c8 47nf rl2 1mega rl2 1mega c3 22uf 400v c3 22uf 400v ql1 ksp2907a rl3 1k rl3 1k zp1 1n4762 zp1 1n4762 zr1 open zr1 open d2 1n4007 d2 1n4007 c7 47uf 25v c7 47uf 25v rl1 1mega rl1 1mega dl1 1n5233b r4 500 r4 500 l1 330uh l1 330uh d1 sb540 d1 sb540 c9 1000uf 16v c9 1000uf 16v rs1 9 rs1 9 r12 open r12 open d3 1n4007 d3 1n4007 c5 470uf 10v c5 470uf 10v rl5 30k rl5 30k c1 2.2nf ac250v c1 2.2nf ac250v cs1 1.5nf cs1 1.5nf r3 560 r3 560
15 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) 2. transformer sc hematic diagram 3. winding specification 4. electrical characteristics 5. core & bobbin core: ee2229 (material: pl-7, ae = 35.7 mm 2 ) bobbin: 10 pin pin (s f) wire turns winding method n p /2 3 20.3 ? 1 72 solenoid winding insulation: polyester tape t = 0.025mm, 1 layers n a 4 50.25 ? 2 22 solenoid winding insulation: polyester tape t = 0.025mm, 2 layers n 5v 6, 7 9, 10 0.65 ? 2 8 solenoid winding insulation: polyester tape t = 0.025mm, 2 layers n p /2 2 10.3 ? 1 72 solenoid winding insulation: polyester tape t = 0.025mm, 2 layers pin spec. remark inductance 1?3 1.20mh 5% 100khz, 1v leakage 1?3 < 30h max short all other pins ee2229 n p /2 n 5v n a 1 2 3 4 5 6, 7 9, 10 n p /2 2mm bottom 3mm top 4 5 3 2 2 1 tape 1t(25um) 1t 2t 2t 1t 2t 7 6 10 9 pin
16 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) 6. demo circuit part list part number value quantity description (manufacturer) c6, c8 47nf 2 ceramic capacitor c1 2.2nf (250v) 1 ac ceramic capacitor c10 1nf (250v) 1 film capacitor cs1 1.5nf (50v) 1 smd ceramic capacitor c2, c3 22f (400v) 2 low impedance electrolytic capacitor kmx series (samyoung elec.) c4, c9 1000f (16v) 2 low esr electrolytic capacitor nxc series (samyoung elec.) c5 470f (10v) 1 low esr electrolytic capacitor nxc series (samyoung elec.) c7 47f (25v) 1 general electrolytic capacitor cl9 10f (50v) 1 general electrolytic capacitor l1 330h 1 inductor l2 1h 1 inductor r6 2.4 (1w) 1 fusible resistor j1 fb 1 ferrite beads j2, j4, l3 0 3 jumper r2 4.7k 1 resistor r3 560 1 resistor r4 500 1 resistor r5, r11 1.2k(1%) 2 resistor r9 10k 1 resistor r10 2 1 resistor r14 30 1 resistor rl3 1k 1 resistor rl1, rl2 1 mega 2 resistor rl4 120k 1 resistor rl5 30k 1 resistor rl7 40k 1 resistor rs1 9 1 resistor u1 h11a817 1 optocoupler (fairchild semiconductor) u2 tl431a 1 shunt regulator (fairchild semiconductor) u3 fsdh0x70rnb 1 fps tm (fairchild semiconductor) ql1 ksp2907a 1 pnp transistor (fairchild semiconductor) ql2 ksp2222a 1 npn transistor (fairchild semiconductor) d2, d3, d4, d5, d6, ds1 1n4007 6 diode (fairchild semiconductor) d1 sb540 1 schottky diode (fairchild semiconductor) dl1 1n5233b 1 zener diode (fairchild semiconductor) zp1 1n4762 1 zener diode zds1 p6ke180a 1 tvs (fairchild semiconductor) t1 ee2229 1 pl-7 core (samwha elec.)
17 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) 7. layout 7.1 top image of pcb 7.2 bottom image of pcb
18 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) package dimensions 8-pin dip dimemsion s in millimeters
19 www.fairchildsemi.com fsdh0170rnb/fsdh0270rnb/FSDH0370RNB rev. 1.0.2 fsdh0170rnb/fsdh0270rnb/fsdh 0370rnb green mode fair child power switch (fps?) disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. trademarks the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms datasheet identification product status definition advance information preliminary no identification needed obsolete this datasheet contains the design specifications for product development. specifications may change in any manner without notice. this datasheet contains preliminary data, and supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. formative or in design first production full production not in production isoplanar? littlefet? microcoupler? microfet? micropak? microwire? msx? msxpro? ocx? ocxpro? optologic ? optoplanar? pacman? pop? power247? poweredge? fast ? fastr? fps? frfet? globaloptoisolator? gto? hisec? i 2 c? i-lo ? implieddisconnect? intellimax? rev. i18 acex? activearray? bottomless? build it now? coolfet? crossvolt ? dome? ecospark? e 2 cmos? ensigna? fact? fact quiet series? powersaver? powertrench ? qfet ? qs? qt optoelectronics? quiet series? rapidconfigure? rapidconnect? serdes? scalarpump? silent switcher ? smart start? spm? stealth? superfet? supersot?-3 supersot?-6 supersot?-8 syncfet? tcm? tinylogic ? tinyopto? trutranslation? uhc? ultrafet ? unifet? vcx? wire? across the board. around the world.? the power franchise ? programmable active droop?

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