FAIRCHILD FAN6754B handbook
Contents
1. Note 4 Guaranteed by design 2011 Fairchild Semiconductor Corporation www fairchildsemi com FAN6754B Rev 1 0 0 8 Typical Performance Characteristics Continued lpo sr Ipo oe MA 40 25 10 5 20 35 50 85 80 95 110 125 Temperature Temperature Figure 10 Operation Supply Current Ipp op1 Figure 9 Startup Current Ipp sr vs Temperature vs Temperature 19j041u02 INMd peje1beju AjuDiH gr6z9NVJ Temperature Temperature Figure 11 Start Threshold Voltage Vpp on Figure 12 Minimum Operating Voltage Vpp orr vs Temperature vs Temperature T 6 5 i o 4 tt ty 3r EAH DL LL s 8 1 18202088 40 25 10 5 20 35 50 65 3 amp 0 95 110 125 40 25 10 5 20 35 50 65 80 95 110 125 Temperature C Temperature Figure 13 Supply Current Drawn from HV Pin luy Figure 14 HV Pin Leakage Current After Startup vs Temperature Iuv Lc vs Temperature m SL Lt LIII el Zi fA d lol 40 25 10 5 20 35 50 65 80 95 110 125 Temperature C fosc KHZ DCYmax Figure 15 Frequency in Normal Mode fosc Figure 16 Maximum Duty Cycle DCYmax vs Temperature vs Temperature 2011 Fairchild Semiconductor Corporation www fairchildsemi com FAN6754B Rev 1 0 0 9 Ty2. cycle When internal update time is met this peak value is used for brownout and current limit level judgment Equation 1 and 2 calculate the level of brownin or brownout converted to RMS value For power saving FAN6754B enlarges the sampling cycle to lower the power loss from HV sampling at light load condition Vic on RMS 0 9V x Cwe yga 1 Vac orr RMS 0 81Vx But 2 2 where Ruy is in 19j041002 INMd peje1beju AjybIH grSZONVA www fairchildsemi com The HV pin can perform current limit to shrink the tolerance of Over Current Protection OCP under full range of AC voltage to linearly current limit curve as shown 0 FAN6754B also shrinks the Viimit level by half to lower the I Rsense loss to increase the heavy load efficiency gt 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 DC Voltage on HV Pin V Figure 25 Linearly Current Limit Curve Vpp Over Voltage Protection OVP Vpp over voltage protection prevents damage due to abnormal conditions If the Vpp voltage is over the over voltage protection voltage Vpp ove and lasts for tp vbpovP the PWM pulses are disabled until Vpp drops below the UVLO then starts again Over voltage conditions are usually caused by open feedback loops Thermal Protection An NTC thermistor in series with resistor RA can be connected from the RT pin to ground A co
3. Blanking LEB Each time the power MOSFET is switched on a turn on spike occurs on the sense resistor To avoid premature termination of the switching pulse a leading edge blanking time is built in During this blanking period the current limit comparator is disabled and cannot switch off the gate driver Under Voltage Lockout UVLO The turn on and turn off thresholds are fixed internally at 17V and 10V respectively During startup the hold up capacitor must be charged to 17V through the startup resistor to enable the IC The hold up capacitor continues to supply Vpp until the energy can be delivered from auxiliary winding of the main transformer Vpp must not drop below 10V during startup This UVLO hysteresis window ensures that hold up capacitor is adequate to supply Vpp during startup 2011 Fairchild Semiconductor Corporation FAN6754B Rev 1 0 0 Gate Output Soft Driving The BiCMOS output stage is a fast totem pole gate driver Cross conduction has been avoided to minimize heat dissipation increase efficiency and enhance reliability The output driver is clamped by an internal 13V Zener diode to protect power MOSFET transistors against undesirable gate over voltage A soft driving waveform is implemented to minimize EMI Soft Start For many applications it is necessary to minimize the inrush current at startup The built in 8ms soft start circuit significantly reduces the startup current spike and output voltag
4. WORLDWIDE TERMS AND CONDITIONS SPECIFICALLY THE WARRANTY THEREIN WHICH COVERS THESE PRODUCTS 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 CORPORA TION Asused herein 1 Life support devices or systems are devices or systems which a are intended for surgical implant inta the body or b support or sustain life and 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 a significant injury of the user 2 A critical component in 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 ANTI COUNTERFEITING POLICY Fairchild Semiconductor Corporation s Ant Counterfeiting Policy F airchild s Anti Counterfeiting Policy is also stated on our external website www fairchildsemi com under Sales Support Counterfeiting of semiconductor parts is a growing problem in the industry All manufacturers of semiconductor products are experiencing counterfeiting of their parts Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation substandard performance failed applications and increased cost of p
5. the voltage on the HV pin is lower than the brownout voltage PWM output turns off High low line compensation dominates the cycle by cycle current limiting to achieve constant output power limiting with universal input Over Temperature Protection An external NTC thermistor is connected from this pin to GND The impedance of the NTC decreases at high temperatures Once the voltage on the RT pin drops below the threshold voltage the controller latches off the PWM If RT pin is not connected to NTC resistor for Over Temperature Protection a 100KQ series one resistor is recommended to ground to prevent from noise interference This pin is limited by an internal clamping circuit Current Sense This pin is used to sense the MOSFET current for the current mode PWM and current limiting The version doesn t have internal SSCP function Supply Voltage IC operating current and MOSFET driving current are supplied using this pin This pin is connected to an external bulk capacitor of typically 47uF The threshold voltages for turn on and turn off are 17V and 10V respectively The operating current is lower than 2mA Gate Drive Output The totem pole output driver for the power MOSFET It is internally clamped SANE below 13V 2011 Fairchild Semiconductor Corporation www fairchildsemi com FAN6754B Rev 1 0 0 3 Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device The device may not function or be oper
6. 1 23 FB Threshold Votage orZero Duy os 20 22 V Continued on the following page 19j041002 INMd peje1beju AjubiH grSZONVA PWM Frequency _ fosc c Vrg zoc Vr amp zbcR Vrgo VrB N Vra Figure 8 Vre vs PWM Frequency 2011 Fairchild Semiconductor Corporation www fairchildsemi com FAN6754B Rev 1 0 0 7 Electrical Characteristics Continued Vpp715V and Ta 25 C unless otherwise noted Symbo Parameter Conditions Min Typ Max Units Current Sense Section t beyo 9 28 us Leacing Edge Banking Time 230 280 39b ns tw 7 8 9 GATE Section Dcu Mamm Duy eye 8 89 9 Vows Gwelowvata 18 V Vos Gate High Votage 8 V Howsw GwesnkCamn 39 SOURCE eRe swa jewerawgrme 9 RT Section 0 7V lt Vrr lt 1 05V after 1000 1 035 1 070 Over Temperature Protection Threshold 12ms Latch Off y Voltage Vet lt 0 7V After 100us Latch Off 0 65 0 70 0 75 VnrrH2 lt VRTTHI SY i FB G Vet lt V FB gt 110 185 260 FB2 Veen 110 188 29 19j041002 INMd peje1beju AjubiH grSZONVA
7. 4B Rev 1 0 0 5 Typical Performance Characteristics Brownout Detection VINLON m _ TS i 4 0 Vin OOOO Gate Start Gr c bonnes Timo A Brownout Debounce Time Gate Stop Figure 6 Brownout Behavior Vpp oN Vp D AC Vp D ON Vpp AC Vpp orr Vpp orr AC Recovery Level OU te eerie SOC Sh D EY CERO CERIS EIS ERROR E A N Recovery Level ellie fer EI TOI CO M S fle Viv 3 Vpp gt Vpp ac AC Recovery Vpp Vpp Ac AC Recovery Figure 7 Vpp ac and AC Recovery 2011 Fairchild Semiconductor Corporation www fairchildsemi com FAN6754B Rev 1 0 0 6 19j041002 INMd peje1beju AjuDiH grcz9NVJ Electrical Characteristics Continued Vpp 15V and Ta 25 C unless otherwise noted Symbol Parameter Condition Min Typ Max Unit Oscillator Section fosc Frequency in Normal Mode KHz Green Mode Frequency 9 2 25 KH tw Frequency Variation vs Vo Devaton VeeHvezv s Frequency Variation vs Temperature Deviation 40 to 105 C o fs me Feedback Input Section A Input Votage to Curent Sense Atenuaton mas 135 VV s Fk e pm oe ET i m Green Mode Entry FB Voltage FB E N Green Mode Ending FB Voltage FB Vre c Wem FBTwesodVotagefoZereDuyRenen ne 2
8. AIL A D LANDPATTERN STANDARD SOIC127P600X175 8M SCALE 2 1 E DRAWING FILENAME MOBAREV13 Figure 26 8 Pin Small Outline Package SOP Package 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 verify or obtain the most recent revision Package specifications do not expand the terms of Fairchild s worldwide terms and conditions 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 2011 Fairchild Semiconductor Corporation www fairchildsemi com ae FAIRCHILD Ditties EA SEMICONDUCTOR TRADEMARKS The following includes registered and unregistered trademarks and service marks owned by Fairchild Semiconductor and or its global subsidiaries and is not intended to be an exhaustive list of all such trademarks AccuPower Auto SPMT AX CAPTW BitSi c Build it NaowTM CorePLUS CorePOVVER CROSSVOLT CTL Current Transfer Logic DEUX PEED Dual Cool EcoSPARK EfficientM ESBC Fairchild Fairchild Semiconductor FACT Quiet Series FACT FAST FastvCore FETBench FlashVvriter FPS F PFS FRFET Global Power Re
9. able 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 Mex Unt Ww jDoSupyVoege V Lie _ _ Vense SENSEPImuVole 70 V Ver nputVotage 70 V Ww V Power Dissinaton _ _ Thermal Resistance Junction to Air 150 T Lead Temperature Wave Soldering or IR 10 Second _ Human Body Model EM ae Electrostatic Discharge Capability JESD22 A114 All Pins Except HV Pin Charged Device Model 00 JESD22 C101 Notes 1 All voltage values except differential voltages are given with respect to the network ground terminal 2 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device ESD with HV pin CDM 1000V HBM 1000V 19j041002 INMd PON U3919 peje1beju AjuDiH grSZONVA Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications Fairchild does not recommend exceeding them or designing to Absolute Ma
10. arly in continuous conduction mode Slope compensation helps alleviate this problem Good placement and layout practices should be followed Avoiding long PCB traces and component leads locating compensation and filter components near the FAN6 54B and increasing the power MOS gate resistance improve performance 19j041002 INMd peje1beju AjuDiH grcz9NVJ www fairchildsemi com Physical Dimensions 5 00 4 80 PA pm 0 65 3 81 hop 6 20 1 75 5 80 5 60 PINONE 1 4 INDICATOR HH 427 0 33 10 25 M C B A 1 27 LAND PATTERN RECOMMENDATION 0 25 SEE DETAIL A 0 10 1 75 E 10 19 0 51 2 ONG e 0 33 OPTION A BEVEL EDGE 0 50 o 7 Q25 9 RO 10 GAGE PLANE Nf OPTION NO BEVEL EDGE 8 N 4 NOTES UNLESS OTHERWISE SPECIFIED 0 A THIS PACKAGE CONFORMS TO JEDEC MS 012 VARIATION AA ISSUE C 0 90 LL SEATING PLANE B ALL DIMENSIONS ARE IN MILLIMETERS 0 406 1 04 c INCLUDE MOLD DET
11. ch Protection Re Start L OLP for MR Protection Soft Driver Soft Start Comparator Soft Start Current Limit Comparator PWM Comparator Slope Compensation 3R OLP E Comparator Figure 2 Functional Block Diagram 2011 Fairchild Semiconductor Corporation FAN6754B Rev 1 0 0 2 www fairchildsemi com 19j041002 INMd peje1boju AjybIH grSZONVSA Marking Information 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 M SOP P Y Package Green M Manufacture Flow Code Pin Configuration Figure 4 Pin Configuration Top View 19j041002 INMd peje1boju AjuDiH grSZONVA Pin Definitions Png name beson OSS yo GND Ground This pin is used for the ground potential of all the pins A 0 1uF decoupling capacitor placed between VDD and GND is recommended Feedback The output voltage feedback information from the external compensation circuit is fed 2 FB into this pin The PWM duty cycle is determined by this pin and the current sense signal from Pin 6 FAN6754B performs open loop protection OLP if the FB voltage is higher than a threshold voltage around 4 6V for more than 56ms the controller latches off the PWM High Voltage Startup This pin is connected to the line input via a 134007 and 200kO resistor to achieve brownout and high low line compensation Once
12. e overshoot Slope Compensation The sensed voltage across the current sense resistor is used for peak current mode control and cycle by cycle current limiting Built in slope compensation improves stability and prevents oscillation FAN6 54B inserts a synchronized positive going ramp at every switching cycle Constant Output Power Limit When the SENSE voltage across sense resistor Rsense reaches the threshold voltage around 0 46V for low line condition the output GATE drive is turned off after a small delay tpp This delay introduces an additional current proportional to tpp Vin Lp Since the delay is nearly constant regardless of the input voltage Vin higher input voltage results in a larger additional current and the output power limit is higher than under low input line voltage To compensate this variation for a wide AC input range a power limiter is controlled by the HV pin to solve the unequal power limit problem The power limiter is fed to the inverting input of the current limiting comparator This results in a lower current limit at high line inputs than at low line inputs Brownout and Constant Power Limited by the HV Pin Unlike previous PWM controllers FAN6754B s HV pin can detect the AC line voltage brownout function and adjust the current limit Using a fast diode and startup resistor to sample the AC line voltage the peak value refreshes and is stored in a register at each sampling
13. eee FAIRCHILD aS Sa SEMICONDUCTOR FAN6754B Highly Integrated Green Mode PWM Controller Brownout and Adjustment by HV Pin Features High Voltage Startup AC Input Brownout Protection with Hysteresis Monitor HV to Adjust Vi init Low Operating Current 1 5mA Linearly Decreasing PWM Frequency to 22KHz Frequency Hopping to Reduce EMI Emission Fixed PWM Frequency 65KHz Peak Current Mode Control Cycle by Cycle Current Limiting Leading Edge Blanking LEB Internal Open Loop Protection GATE Output Maximum Voltage Clamp 13V Vpp Under Voltage Lockout UVLO Vpp Over Voltage Protection OVP Programmable Over Temperature Protection OTP Internal Latch Circuit OVP OTP Open Loop Protection OLP Restart for MR Latch for ML Built in 8ms Soft Start Function Applications General purpose switch mode power supplies and flyback power converters including Power Adapters Ordering Information RMY FAN6754BMLMY Operating Temperature Range Part Number 2011 Fairchild Semiconductor Corporation FAN6754B Rev 1 0 0 April 2011 Description The highly integrated FAN6754B PWM controller provides several features to enhance the performance of flyback converters To minimize standby power consumption proprietary green mode function provides off time modulation to continuously decrease the switching frequency under light load conditions Under zero load very li
14. ght load conditions FAN6754B saves PWM pulses by entering deep burst mode This burst mode function enables the power supply to meet international power conservation requirements FAN6754B integrates a frequency hopping function internally to reduce EMI emission of a power supply with minimum line filters Built in synchronized slope compensation is accomplished by proprietary HV monitor to adjust for constant output power limit over universal AC input range The gate output is clamped at 13V to protect the external MOSFET from over voltage damage Other protection functions include AC input brownout protection with hysteresis and Vpp over voltage protection For over temperature protection an external NTC thermistor can be applied to sense the external switchers temperature When Vpp OVP or OTP are activated an internal latch circuit is used to latch off the controller The latch mode is reset when the Vpp supply is removed FAN6754B is available in an 8 pin SOP package Package Packing Method 40 to 105 C 8 Pin Small Outline Package SOP Tape amp Reel 19j041002 INMd peje1beju AjubiH grSZONVA www fairchildsemi com Application Diagram N EMI Filter L T i FAN6754B 4 bo Figure 1 Typical Application Internal Block Diagram HV OVP OTP OLP for ML Brownout Protection Adjustment Internal BIAS Debounce OVP to otp2 Counter GND Lat
15. n First Production Semiconductor reserves the right to make changes at any time without notice to improve design Datasheet contains final specifications Fairchild Semiconductor reserves the right to make changes at any time without notice to improve the design 2011 Fairchild Semiconductor Corporation FAN6754B Rev 0 0 1 14 Datasheet contains specifications on a product that is discontinued by Fairchild Semiconductor The datasheet is for reference information only Rev 54 INMd pejebeju AjubiH vtsZ9NVJ www fairchildsemi com
16. nstant current lar is output from the RT pin The voltage on the RT pin can be expressed as Vnr7Inr Rntc Rerc where Inr is 100pA At high ambient temperature 2011 Fairchild Semiconductor Corporation FAN6754B Rev 1 0 0 is smaller such that Vrt decreases When Vni is less than 1 035V VrttHi1 the PWM turns off after 16ms tp oTp1 If VRT is less than 0 7V VRrTH2 the PWM turns off after 185us tp orp2 If the RT pin is not connected to NTC resistor for over temperature protection connecting a series one 100K39l resistor to ground to prevent from noise interference is recommended This pin is limited by an internal clamping circuit Limited Power Control The FB voltage increases every time the output of the power supply is shorted or overloaded If the FB voltage remains higher than a built in threshold for longer than tp o_p PWM output is turned off As PWM output is turned off Vpp begins decreasing When Vpp goes below the turn off threshold 10V the controller is totally shut down and Vpp is continuously discharged to Vpp oLtp 6 5V by Ipp orp to lower the average input power This is called two level UVLO Vpp is cycled again This protection feature continues as long as the overloading condition persists This prevents the power supply from overheating due to overloading conditions Noise Immunity Noise on the current sense or control signal may cause significant pulse width jitter particul
17. p current drawn from the HV pin is J2 Rav and charges the hold up capacitor through the diode and resistor When the Vpp capacitor level reaches Vpp on the startup current switches off At this moment the Vpp capacitor only supplies the FAN6754B to keep the Vpp until the auxiliary winding of the main transformer provides the operating current Operating Current Operating current is around 1 5mA The low operating current enables better efficiency and reduces the requirement of Vpp hold up capacitance Green Mode Operation The proprietary green mode function provides off time modulation to reduce the switching frequency in light load and no load conditions Veg which is derived from the voltage feedback loop is taken as the reference Once Vra is lower than the threshold voltage Vrfe n the switching frequency is continuously decreased to the minimum green mode frequency of around 22KHz Current Sensing PWM Current Limiting Peak current mode control is utilized to regulate output voltage and provide pulse by pulse current limiting The switch current is detected by a sense resistor into the SENSE pin The PWM duty cycle is determined by this current sense signal and Vra the feedback voltage When the voltage on the SENSE pin reaches around Vcomp Vrg 0 6 4 the switch cycle is terminated immediately Vcomp is internally clamped to a variable voltage around 0 46V for low line output power limit Leading Edge
18. pical Performance Characteristics Continued 40 25 10 5 80 95 11 Temperature Figure 17 FB Open Loop Trigger Level Vrg oip vs Temperature 27 26 24 Temperature Figure 19 Vpp Over Voltage Protection Vpp ovp vs Temperature 0 9 Temperature Figure 21 Over Temperature Protection Threshold Voltage VrttH1 Vs Temperature 124 amp LLL LL LL LLL tT 118 116 114 112 110 Vac oN V 108 106 104 Temperature Figure 23 Brownin Vac on vs Temperature 2011 Fairchild Semiconductor Corporation FAN6754B Rev 1 0 0 10 65 60 ms 55 Temperature Figure 18 Delay Time of FB Pin Open Loop Protection tp oip vs Temperature lar HA 25 10 5 20 35 50 65 80 95 110 125 Temperature Figure 20 Output Current from RT Pin Inr vs Temperature 0 9 0 8 0 7 Vnrm2 V 0 6 Temperature Figure 22 Over Temperature Protection Threshold Voltage vs Temperature Vac oFr V Temperature C Figure 24 Brownout Vac orr Vs Temperature www fairchildsemi com 19j041002 INMd peje1beju AjuDiH grcz9NVJ Functional Description Startup Current For startup the HV pin is connected to the line input through an external diode and resistor Ruy 1N4007 200KQ recommended Peak startu
19. roduction and manufacturing delays Fairchild is taking strong measures to protect ourselves and our customers fromthe proliferation of counterfeit parts Fairchild strongly encourages customers to purchase Fairchild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above Products customers buy either from Fairchild directly or from Authorized Fairchild Distributors are genuine parts have full traceability meet Fairchild s quality standards for handling and storage and provide access to Fairchild s full range of up to date technical and product information Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address any warranty issues that may arise Fairchild will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources Fairchild is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Datasheet contains the design specifications for product development Specifications may change in any manner without notice Datasheet contains preliminary data supplementary data will be published at a later date Fairchild Advance Information Formative In Design Preliminary No Identification Needed Full Productio
20. source Green FPS Green F PST e Series Gmax GT Or IntelliM AXTM ISOPLANART MegaBuck MICROCOUPLER MicroFET MicroPak 2 MillerDrive MotionMax Mation SPM T mA Saver OptoHiT OPTOLOGIC OPTOPLANAR PDP SPM Power SPM PowerTrench Powerxs Programmable Active Droop QFET QST Quiet Series Rapid Config ure y Saving our world ImVWVV KVY at a time Signal Vise SmartM ax SMART START SPM STEALTH SuperFET SupersOT 3 SuperSOT 6 SuperSOT 8 SupreMos SyncFETT Sync Lock SYSTEM s GENERAL Trademarks of System General Corporation used under license by Fairchild Semiconductor DISCLAIMER The Power Franchise The Right Technology for Your Success ihe 9L TinyBoost TinyBuck TinyCalc TinyLog ic TINYOPTO TinyPower TinyPVVMIT TinyVVire Transic TriFault Detect TRUECURRENT uSerDes 5 UHC Ultra FRFET UniFET VCXT Visual X STM FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TOIMPROVE RELIABILITY FUNCTION OR DESIGN FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY LICENSE UNDER ITS PATENT RIGHTS NOR THE RIGHTS OF OTHERS THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD S
21. ximum Ratings EL 2011 Fairchild Semiconductor Corporation www fairchildsemi com FAN6754B Rev 1 0 0 4 Electrical Characteristics Vpp 15V and Ta 25 C unless otherwise noted symbol Parameter Conon min Typ Max Unt Magen SC Vpp Section Ve Continuously Operating vors Jav Wem Star voes e W 9 V Veo Minimum Operating Votage 9 9 v MEE V Threshold Voltage on VDD Pin for V DD LH Latch Off Release Voltage Threshold Voltage on VDD Pin for V V V Vppo ac Disable AC Recovery to Avoid 42 x i Startup Failed Operating Supply Current Vpp 20V FB 3V Gate DD OP1 PWM Operation Open ES AEN LZ Operating Current at PWM Off lin Phase Under Latch Off Vpp 5V Conduction Internal Sink Current Under Latch loo oLP Off Conduction 0 1 Vpp Over Voltage Protection t Vpp Over Voltage Protection D VDDOVP Debounce Time 19j041002 INMd peje1beju AjuDiH grSZONVA HV Section iom 90V Vpc 120V DC Source Series Vac orr Brownout Threshold R 200kQ to HV Pin See Equation 1 DC Source Series Vac on Brownin Threshold R 200kQ to HV Pin See Equation 2 DC Source Series ts cycte Voltage Sample Cycle Us FB Ves mf wwe Line Votage Continued on page 7 2011 Fairchild Semiconductor Corporation www fairchildsemi com FAN675
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FAIRCHILD FAN6754B handbook