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september 2010 ? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 FSL127H ? green mode fairchild power switch (fps?) FSL127H green mode fairchild power switch (fps?) features ? built-in 5ms soft-start function ? internal avalanche-rugged 700v sensefet ? low audio noise ? high-voltage startup ? fixed pwm frequency at 100khz ? linearly decreasing pwm frequency to 18khz ? peak-current-mode control ? cycle-by-cycle current limiting ? leading-edge blanking (leb) ? synchronized slope compensation ? internal open-loop protection (olp) ? v dd under-voltage lockout (uvlo) ? v dd over-voltage protection (ovp) ? constant power limit (full ac input range) ? internal otp sensor with hysteresis applications general-purpose switch-mode power supplies and flyback power converters, including: ? smps for vcr, svr, stb, dvd & vcd player, printer, facsimile, & scanner ? adapter for camcorder description the highly integrated FSL127H consists of a current mode pulse width modulator (pwm) and an avalanche- rugged 700v sensefet. it is s pecifically designed for high-performance offline switch mode power supplies (smps) with minimal external components. the integrated pwm controller features include a proprietary green-mode function that provides off-time modulation to linearly decrease the switching frequency at light-load conditions to minimize standby power consumption. to avoid acoustic noise problems, the minimum pwm frequency is set above 18khz. this green-mode function enables the power supply to meet international power conservation requirements. with the internal high-voltage startup circuitry, the power loss due to bleeding resistors is also eliminated. to further reduce power consumption, the pwm controller is manufactured using the bicmos process, which allows an operating current of only 3.5ma. the FSL127H built-in synchronized slope compensation achieves stable peak-current-mode control. the proprietary external line compensation ensures constant output power limit over a wide ac input voltage range, from 90v ac to 264v ac . the FSL127H provides many protection functions. in addition to cycle-by-cycle current limiting, the internal open-loop protection circuit ensures safety when an open-loop or output short-circuit failure occurs. pwm output is disabled until v dd drops below the uvlo lower limit, when the controller starts up again. as long as v dd exceeds ~28v, the internal ovp circuit is triggered. compared to a discrete mosfet and controller or rcc switching converter solution, the FSL127H reduces total component count, design size, and weight while increasing efficiency, productivity, and system reliability. these devices provide a basic platform well suited for design of cost-effective flyback converters. ordering information part number sensefet operating temperature range package packing method FSL127Hny 2.0a 700v -40c to +105c 8-pin dual in-line package (mdip), jedec ms-001, .300" wide tube
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 2 FSL127H ? green mode fairchild power switch (fps?) application diagram hv drain gnd vdd fb vin figure 1. typical flyback application output power table (1) product 230v ac 15% (2) 85-265v ac adapter (3) open frame (4) adapter (3) open frame (4) FSL127H 14w 20w 11w 16w notes: 1. the maximum output power can be limited by junction temperature. 2. 230 v ac or 100/115 v ac with doublers. 3. typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat sink, at t a =50 c ambient. 4. maximum practical continuous power in an open-frame des ign with sufficient drain pattern as a heat sink, at t a =50 c ambient. internal block diagram figure 2. internal block diagram
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 3 FSL127H ? green mode fairchild power switch (fps?) pin configuration figure 3. pin configuration pin definitions pin # name description 1 gnd ground . sensefet source terminal on prim ary side and internal control ground. 2 v dd power supply . the internal protection circuit disables pwm output as long as v dd exceeds the ovp trigger point. 3 fb feedback . the signal from the external compensation ci rcuit is fed into this pin. the pwm duty cycle is determined in response to the signal on this pin and the current-sense signal on the sense pin. 4 v in line-voltage detection . the line-voltage detection is used for constant output power limit. it is suggested to add a low pass filter to f ilter out line ripple on bulk capacitor. 5 hv startup. for startup, this pin is pulled high to t he line input or bulk capacitor via resistors. 6 drain sensefet drain . high-voltage power sensefet drain connection. 7 drain sensefet drain . high-voltage power sensefet drain connection. 8 drain sensefet dain . high-voltage power sensefet drain connection. f ? fairchild logo z ? plant code x ? 1-digit year code y ? 1-digit week code tt ? 2-digit die run code t ? package type (n: dip) p ? y: green package m ? manufacture flow code
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 4 FSL127H ? green mode fairchild power switch (fps?) absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. symbol parameter min. max. unit v drain drain pin voltage (5,6) 700 v i dm drain current pulsed (7) 8 a e as single pulsed avalanche energy (8) 140 mj v vdd dc supply voltage 30 v v fb fb pin input voltage -0.3 7.0 v v vin vin pin input voltage -0.3 7.0 v v hv hv pin input voltage 700 v p d power dissipation (t a 50c) 1.5 w ja junction-to-air thermal resistance 80 c/w jt junction-to-top thermal resistance (9) 35 c/w t j operating junction temperature +150 c t stg storage temperature range -55 +150 c t l lead temperature (wave soldering or ir, 10 seconds) +260 c esd electrostatic discharge capability, all pins except hv pin (10) human body model: jesd22-a114 4.5 kv charged device model: jesd22-c101 1.5 notes : 5. all voltage values, except differential voltages, ar e given with respect to the network ground terminal. 6. stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. 7. non-repetitive rating: pulse width is limited by maximum junction temperature. 8. l = 51mh, starting t j = 25 c. 9. measured on the package top surface. 10. all pins including hv pin: hbm=500v, cdm=1250v. recommended operating conditions the recommended operating conditions table defines the conditions for actual device operation. recommended operating conditions are specified to ens ure optimal performance to the datasheet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter min. typ. max. unit t a operating ambient temperature -40 +105 c
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 5 FSL127H ? green mode fairchild power switch (fps?) electrical characteristics v dd =15v and t a =25 c unless otherwise specified. symbol parameter conditions min. typ. max. unit sensefet section (11) bv dss drain- source breakdown voltage v gs = 0v 700 v i dss zero-gate-voltage drain current v ds = 700v, v gs = 0v 0.5 50.0 a v ds = 560v, v gs = 0v, t a = 125 c 1 200 r ds(on) drain-source on-state resistance (12) v gs = 10v, i d = 0.5a 6.0 7.2 ? c iss input capacitance v gs = 0v, v ds = 25v, f = 1mhz 550 715 pf c oss output capacitance v gs = 0v, v ds = 25v, f = 1mhz 38 50 pf c rss reverse transfer capacitance v gs = 0v, v ds = 25v, f = 1mhz 17 26 pf t d(on) turn-on delay time v ds = 350v, i d = 1.0a 20 50 ns t r rise time v ds = 350v, i d = 1.0a 15 40 ns t d(off) turn-off delay time v ds = 350v, i d = 1.0a 55 120 ns t f fall time v ds = 350v, i d = 1.0a 25 60 ns v dd section v op continuously operating voltage 22 v v dd-on start threshold voltage 11 12 13 v v dd-off minimum operating voltage 7 8 9 v i dd-st startup current v dd-on ? 0.16v 30 a i dd-op operating supply current v dd = 15v, v fb = 3v 3.0 3.5 4.0 ma i dd-bm green-mode operating supply current v fb = v zdc 2 ma i dd-olp internal sink current v th-olp +0.1v 30 60 90 a v th-olp i dd-olp off voltage 5 6 7 v v dd-ovp v dd over-voltage protection 27 28 29 v t d-vddovp v dd over-voltage protection debounce time 75 130 200 s hv section i hv maximum current drawn from hv pin hv 120v dc , v dd = 0v with 10f 1.5 3.5 5.0 ma i hv-lc leakage current after startup hv = 700v, v dd = v dd-off +1v 1 20 a oscillator section f osc frequency in nominal mode center frequency 94 100 106 khz f osc-g green-mode frequency 14 18 22 khz d max maximum duty cycle 85 % f dv frequency variation vs. v dd deviation v dd = 9v to 22v 5 % f dt frequency variation vs. temperature deviation (11) t a = -40 to +105 c 5 % continued on the following page?
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 6 FSL127H ? green mode fairchild power switch (fps?) electrical characteristics (continued) v dd =15v and t a =25 c unless otherwise specified. symbol parameter conditions min. typ. max. unit v in section v in-on pwm turn-on threshold voltage 0.98 1.03 1.08 v v in-rl release latch voltage 0.60 0.70 0.80 v v in-h pull high latch trigger level 4.4 4.7 5.0 v t in-h pull high latch debounce time 120 s v in-l pull low auto recovery trigger level 0.2 0.3 0.4 v feedback input section a v fb voltage to current-sense attenuation 1/4.0 v/v z fb input impedance 9.5 k ? v fb-open output high voltage 5 v v fb-olp fb open-loop trigger level 4.4 4.6 4.8 v t d-olp delay time of fb pin open-loop protection 50 56 59 ms v fb-n green-mode entry fb voltage 2.3 2.5 2.7 v v fb-g green-mode ending fb voltage v fb-n - 0.1 v v fb-zdc zero duty cycle fb voltage 1.9 2.1 2.3 v figure 4. v fb vs. pwm frequency symbol parameter conditions min. typ. max. unit current-sense section i lim at v in = 1.2v peak current limit v in = 1.2v 0.51 0.61 0.71 a i lim at v in = 3.6v peak current limit v in = 3.6v 0.44 0.54 0.64 a t ss period during soft-start time (11) 4.5 5.0 5.5 ms over-temperature protection section (otp) t otp protection junction temperature (11,13) 142 c notes: 11. these parameters, although guaranteed, are not 100% tested in production. 12. pulse test: pulse width 300 s, duty 2%. 13. when activated, the output is disabled and the latch is turned off. pwm frequency f osc f osc-g v fb-n v fb-g v fb-zdc v fb
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 7 FSL127H ? green mode fairchild power switch (fps?) typical characteristics figure 5. i dd-st vs. temperature figure 6. i dd-op vs. temperature figure 7. v dd-on vs. temperature figure 8. v dd-off vs. temperature figure 9. v th-olp vs. temperature figure 10. v dd-ovp vs. temperature
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 8 FSL127H ? green mode fairchild power switch (fps?) typical characteristics figure 11. i hv vs. temperature figure 12. f osc vs. temperature figure 13. f osc-g vs. temperature figure 14. v in-on vs. temperature figure 15. v in-rl vs. temperature figure 16. v in-h vs. temperature
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 9 FSL127H ? green mode fairchild power switch (fps?) typical characteristics figure 17. v in-l vs. temperature figure 18. v fb-n vs. temperature figure 19. v fb-olp vs. temperature figure 20. t d-olp vs. temperature figure 21. v fb-zdc vs. temperature figure 22. i dd-bm vs. temperature
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 10 FSL127H ? green mode fairchild power switch (fps?) functional description startup operation for startup, the hv pin is connected to the line input or bulk capacitor through the external resistor r hv , as shown in figure 23. typical startup current drawn from the hv pin is 3.5ma and it charges the v dd capacitor through the resistor r hv . the startup current turns off when the v dd capacitor voltage reaches v dd-on . the v dd capacitor maintains v dd until the auxiliary winding of the transformer provides the operating current. c dc FSL127H c dd d dd r hv hv vdd n a ac line figure 23. startup circuit slope compensation FSL127H is designed for flyback power converter. the peak-current-mode control is used to optimize system performance. slope compensation is added to stabilize the current loop. the FSL127H inserts a synchronized, positively sloped ramp at each switching cycle. soft start the FSL127H has internal soft-start circuit that slowly increases the sensefet current after startup. the typical soft-start time is 5ms, during which the v limit level is increased in six steps to smoothly establish the required output voltage, as shown in figure 24. it also helps prevent transformer saturation and reduces stress on the secondary diode during startup. figure 24. soft-start function green-mode operation the FSL127H uses feedback voltage (v fb ) as an indicator of the output load and modulates the pwm frequency, as shown in figure 25, such that the switching frequency decreases as load decreases. in heavy load conditions, the switching frequency is 100khz. once v fb decreases below v fb-n (2.5v), the pwm frequency starts to linea rly decrease from 100khz to 18khz to reduce the switching losses. as v fb decreases below v fb-g (2.4v), the switching frequency is fixed at 18khz and FSL127H enters ?deep? green mode to reduce the standby power consumption. as v fb decreases below v fb-zdc (2.1v), FSL127H enters burst-mode operation. when v fb drops below v fb-zdc , FSL127H stops switching and the output voltage starts to drop, which causes the feedback voltage to rise. once v fb rises above v fb-zdc , switching resumes. burst mode alternately enables and disables switching, thereby reducing switching loss to improve power saving, as shown in figure 26. figure 25. pwm frequency figure 26. burst mode operation
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 11 FSL127H ? green mode fairchild power switch (fps?) constant power control to limit the output power of the converter constantly, high/low line compensation is included. sensing the converter input voltage through the vin pin, the high/low line compensation function generates a relative peak-current-limit th reshold voltage for constant power control, as shown in figure 27. figure 27. constant power control protections the FSL127H provides protection functions to prevent the power supply and the load from being damaged. the protection features include: latch / auto recovery function the FSL127H provides additional protections by the vin pin, such as pull-high latch and pull-low auto recovery that depend on the application. as shown in figure 28, when v in level is higher than 4.7v, FSL127H is latched until the v dd is discharged. FSL127H is in auto recovery when the v in level is lower than 0.3v. figure 28. vin pin function open-loop / overload protection (olp) when the upper branch of the voltage divider for the shunt regulator (ka431 shown) is broken, as shown in figure 29, or over-current or output short occurs; there is no current flowing through the opto-coupler transistor, which pulls up the feedback voltage to 6v. when the feedback voltage is above 4.6v for longer than 56ms, olp is triggered. this protection is also triggered when the smps output drops below the nominal value longer than 56ms due to the overload condition. figure 29. olp operation v dd over-voltage protection (ovp) v dd over-voltage protection prevents ic damage caused by over voltage on the v dd pin. the ovp is triggered when v dd reaches 28v. it has a debounce time (typically 130s) to prevent false trigger by switching noise. over-temperature protection (otp) the sensefet and the control ic are integrated, making it easier to detect the temperature of the sensefet. when the temperature exceeds approximately 142 c, thermal shutdown is activated.
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 12 FSL127H ? green mode fairchild power switch (fps?) typical application circuit application fairchild devices input voltage range output adapter FSL127H 90~264v ac 12v/0.85a (10.2w) features ? high efficiency (>76.74% at full load) meeting e nergy star v2.0 regulation with enough margin ? standby power <100mw at no-load condition ? provides full protection functions, including: ovp otp olp vin-h vin-l latch latch auto restart latch auto restart figure 30. measured standby power figure 31. over-current protection figure 32. schematic of typical application circuit
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 13 FSL127H ? green mode fairchild power switch (fps?) typical application circuit (continued) transformer specification ? core: ee16 ? bobbin: ee16 figure 33. transformer diagram no. terminal wire ts s f w1 5 4 2uew 0.3*1 13 w2 2 1 2uew 0.26*1 75 w3 4 copper shield 1.2 w4 8 10 tex-e 0.35*1 13 core rounding tape 3 primary-side inductance=880 h 5% primary-side effective leakage<20 h 5%
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 14 FSL127H ? green mode fairchild power switch (fps?) physical dimensions 5.08 max 0.33 min 2.54 7.62 0.56 0.355 1.65 1.27 3.683 3.20 3.60 3.00 6.67 6.096 9.83 9.00 7.62 9.957 7.87 0.356 0.20 notes: unless otherwise specified a) this package conforms to jedec ms-001 variation ba b) all dimensions are in millimeters. c) dimensions are exclusive of burrs, mold flash, and tie bar extrusions. d) dimensions and toleranc es per asme y14.5m-1994 8.255 7.61 e) drawing filename and revsion: mkt-n08frev2. (0.56) figure 34. 8-pin dual in-line package (dip) package drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and condition s, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
? 2010 fairchild semiconductor corporation www.fairchildsemi.com FSL127H ? rev. 1.0.2 15 FSL127H ? green mode fairchild power switch (fps?)

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