HFC0310 Fixed-Frequency Flyback Controller The Future of Analog IC Technology DESCRIPTION FEATURES The HFC0310 is a flyback controller with fixedfrequency operation. • The controller uses peak current mode to provide excellent transient response and ease loop compensation. When the output power falls below a given level, the controller enters burst mode to lower the stand-by power consumption. An external capacitor connected between the FSET pin and GND programs the HFC0310 switching frequency. Otherwise, the HFC0310 uses a frequency shaping function that greatly reduces the noise level, and reduces the cost of the EMI filter. The HFC0310 provides various protections, such as thermal shutdown, VCC under-voltage lockout, over-load protection, over-voltage protection, and short-circuit protection. The HFC0310 is available in a SOIC8 package. • • • • • • • • • • • • • Programmable switching frequency up to 600kHz Frequency shaping (±3.5%) Current-mode operation Very low start-up current (12μA) Very low standby power consumption via active-burst mode Internal 350ns leading-edge blanking Built-in 3ms soft-start function Internal slope compensation Built-in PRO pin pull-up (>3.25V) autorestart function Over-temperature protection VCC under-voltage lockout with hysteresis Over-voltage protection on VCC Time-based over-load protection Short-circuit protection APPLICATIONS • • • Power Meters Switching Mode Power Supplies AC/DC Adapters, Switching Chargers All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 1 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER TYPICAL APPLICATION T1 Output * * AC Input RTN * CS PRO GND FB 5 4 6 3 HFC0310 7 2 8 1 Drv NC VCC FSET HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 2 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER ORDERING INFORMATION Part Number* HFC0310GS Package SOIC8 Top Marking HFC0310 Free Air Temperature (TA) –40°C to +105°C * For Tape & Reel, add suffix –Z (e.g. HFC0310GS–Z); PACKAGE REFERENCE ABSOLUTE MAXIMUM RATINGS (1) Recommended Operation Conditions Vcc ................................................–0.3V to 30 V All Other Pins ..................................–0.3V to 7 V (2) Continuous Power Dissipation (TA = +25°C) SOIC8 ...................................................... 1.04W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature............... -60°C to +150°C Thermal Shut Down ..................................150°C Thermal Shut Down Hysteresis ..................40°C ESD Capability Human Body Model (All Pins except Drain) ........................................... 2.0kV ESD Capability Machine Model ................. 200V Operating Temperature........... –40°C to +105°C VCC to GND ......................................... 8V to 20V Maximum Junction Temp. (TJ) .............. +125°C Thermal Resistance (4) θJA (3) θJC SOIC8..................................... 96 ...... 45... °C/W Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB. HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 3 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER ELECTRICAL CHARACTERISTICS VCC =12V, TA=+25°C, unless otherwise noted Parameter Driving Signal (Pin Drv) Sourcing Resistor Sinking Resistor Supply Voltage Management (Pin Vcc) VCC Upper Turn-On/Off Level VCC, Lower Turn-On/Off Level Start-Up Current VCC OVP Level VCC Protection-Enabled Recharge Level Internal IC Consumption, Protection Phase Feedback Management (Pin FB) Internal Pull-Up Resistor Internal Pull-Up Voltage FB to Current-Set–Point Division Ratio Internal Soft-Start Time Falling FB Level Where the Regulator Enters Burst Mode Rising FB Level where the Regulator Exits Burst Mode Over-Load Set Point Over-Load Delay Time Timing Capacitor(FSET) Maximum Voltage on the FSET Capacitor Source Current FSET Capacitor Discharge Time (Active at drive turn on) Frequency Spectrum Shaping range, in percentage of Fs Current Sampling Management (CS) Leading-Edge Blanking for Current Sensor Leading-Edge Blanking for SCP Maximum Current Set-Point Short-Circuit–Protection Set Point Internal-Slope–Compensation Ramp Protection Management (PRO) Protection Voltage Protection Hysteresis Symbol Conditions Min RH RL 11 8.5 VCC=VCCH0.5V, Before start up VOVP VCCR IPro Max 20 10 VCCH VCCL IST Typ 23.3 5.7 VCC =6.0V RFB VUP IDIV tSS 12.5 Unit Ω Ω 12 9.3 13 10 V V 12 20 μA 24.5 6.2 25.7 6.7 V V 8 10 μA 14 4.5 3 3 15.5 kΩ V ms VBURL 0.5 V VBURH 0.7 V VOLP tDelay 3.5 3.8 82 4 V ms VFSETmax 0.83 0.87 0.91 V IFSET 45 53 61 μA Fs=100kHz tDISCH 400 ns RShaping ±3.5 % tLEB1 350 ns tLEB2 VCS VSC SRamp VPRO VHY 0.91 1.55 fS=100kHz 3.1 240 0.95 1.65 38 3.25 0.2 0.98 1.75 3.4 HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. ns V V mV/μs V V 4 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER PIN FUNCTIONS Package Pin # Name 1 FSET 2 VCC 3 4 5 6 7 NC Drv CS PRO GND 8 FB Description Switching Converter Frequency Set. Connect a capacitor to GND to set the switching frequency up to 600kHz. Supply Voltage. Connect to a 47μF bulky capacitor and a 0.1μF ceramic capacitor for most applications. When VCC rises to 12V, the IC starts switching; when it falls below 9.3V, the IC stops switching. Not Connected. This pin ensures adequate creepage distance. Drive Signal Output. Primary Current Sense. Pull up PRO to shut down the IC with hysteresis. Ground. Feedback. The output voltage from the external compensation circuit is fed into this pin. This pin and the current sense signal from Source determines the PWM duty cycle. A feedback voltage of 3.8V triggers over-load protection, while 0.5V triggers burst-mode operation. The regulator exits burst-mode operation and enters normal operation when the FB voltage reaches 0.7V HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 5 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER TYPICAL CHARACTERISTICS 12.2 12.0 11.8 11.6 11.4 11.2 11.0 -50 -30 -10 10 30 50 70 90 110 130 9.4 9.2 9.0 8.8 8.6 8.4 FB Decreasing Level at which the Regulator enter the Burst Mode vs. 0.60Temperature PIN FB TO CURRENT SET POINT DIVISION RATIO FB Increasing Level at which the Regulator leave the Burst Mode vs. Temperature 0.80 0.75 0.70 0.65 0.60 -50 -30 -10 10 30 50 70 90 110130 0.58 0.56 3.40 0.54 3.35 0.52 0.50 3.30 0.48 3.25 0.46 3.20 0.44 3.15 0.42 0.40 -50 -30 -10 10 30 50 70 90 110 130 3.10 -50 -30 -10 10 30 50 70 90 110130 5.9 -50 -30 -10 10 30 50 70 90 110130 Over Load Set Point vs. Temperature Over Load Delay Time vs. Temperature 3.82 OVER LOAD SET POINT (V) VCC RE-CHARGE LEVEL AT WHICH THE PROTECTIONS OCCURS (V) FB INCREASING LEVEL AT WHICH THE REGULATOR LEAVE THE BURST MODE (V) 6.0 23.0 Pin FB to Current Set point Division Ratio vs. Temperature 3.45 6.1 23.5 22.0 -50 -30 -10 10 30 50 70 90 110 130 3.50 6.2 24.0 8.0 -50 -30 -10 10 30 50 70 90 110130 6.6 6.3 24.5 22.5 6.7 6.4 25.0 8.2 VCC Re-Charge Level at which the protections occurs vs.Temperature 6.5 25.5 9.6 VCC OVP LEVEL (V) 12.4 26.0 9.8 FB DECREASING LEVEL AT WHICH THE REGULATOR ENTER THE BURST MODE (V) 12.6 VCC OVP Level vs. Temperature 3.80 3.78 3.76 3.74 3.72 3.70 -50 -30 -10 10 30 50 70 90 110130 OVER LOAD DELAY TIME (mS) 12.8 VCC Lower Level at which the IC switch off vs. Temperature 10.0 VCC LOWER LEVEL AT WHICH THE IC SWITCH OFF (V) VCC UPPER LEVEL AT WHICH THE IC SWITCH ON (V) VCC Upper Level at which the IC switch on vs. Temperature 13.0 83.0 82.8 82.6 82.4 82.2 82.0 81.8 81.6 81.4 81.2 81.0 -50 -30 -10 10 30 50 70 90 110 130 HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 6 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER TYPICAL CHARACTERISTICS (continued) Maximum Current Set-point vs. Temperature 1.70 0.98 0.99 1.68 0.96 0.94 0.92 0.90 0.88 0.86 0.84 SHORT CIRCUIT PROTECTION SET POINT (V) 1.00 MAXIMUM CURRENT SET-POINT (V) 1.00 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.82 0.91 0.80 -50 -30 -10 10 30 50 70 90 110130 0.90 -50 -30 -10 10 30 50 70 90 110130 39.0 Internal Slope Compensation Ramp vs. Temperature Chart 38.5 38.0 37.5 37.0 36.5 36.0 35.5 -50 -30 -10 10 30 50 70 90 110130 Short Circuit Protection Set Point vs. Temperature Chart 1.66 1.64 1.62 1.60 1.58 1.56 1.54 1.52 1.50 -50 -30 -10 10 30 50 70 90 110130 Protection Voltage vs. Temperature 3.40 PROTECTIONVOLTAGE (V) MAXIMUM VOLTAGE ON FSET CAPACITOR (V) Maximum Voltage On FSET Capacitor vs. Temperature 3.35 3.30 3.25 3.20 3.15 3.10 -50 -30 -10 10 30 50 70 90 110130 HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 7 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER TYPICAL PERFORMANCE CHARACTERISTICS VIN=230VAC, VOUT1=12V/0.8A, VOUT2=8V/0.2A, VOUT3=8V/0.05A, TA=+25°C, unless otherwise noted. Efficiency EMI Output Voltage Ripple Full Load 90 80 115VAC 80 230VAC SGL EN55022Q 1 PK MAXH 60 2 AV MAXH 50 EN55022A TDS VOUT1 20mV/div. 40 50 VOUT2 100mV/div. 30 40 20 30 10 6DB 20 VOUT3 50mV/div. 0 10 0 10 MHz 70 70 60 1 MHz -10 -20 0 0.2 0.4 0.6 0.8 1 1.1 150kHz 30MHz Output Voltage Ripple Stress Input Power Startup No Load VIN = 420VAC, Full Load Full Load VOUT1 50mV/div. VOUT1 5V/div. VIN 100V/div. VOUT2 10mV/div. VDS 200V/div. VOUT3 10mV/div. VOUT2 5V/div. VOUT3 5V/div. Input Power Startup Input Power Shutdown Input Power Shutdown No Load Full Load No Load VOUT1 5V/div. VIN 100V/div. VOUT1 5V/div. VIN 100V/div. VOUT1 5V/div. VIN 100V/div. VOUT2 5V/div. VOUT2 5V/div. VOUT2 5V/div. VOUT3 5V/div. VOUT3 5V/div. VOUT3 5V/div. HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 8 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=230VAC, VOUT1=12V/0.8A, VOUT2=8V/0.2A, VOUT3=8V/0.05A, TA=+25°C, unless otherwise noted. SCP Entry SCP Recovery SCP Startup Full Load Full Load Full Load VDS 100V/div. VDS 100V/div. VDS 100V/div. VCS 500mV/div. VCC 10V/div. VFB 2V/div. VCS 500mV/div. VCC 10V/div. VFB 2V/div. VCS 500mV/div. VCC 10V/div. VFB 2V/div. OVP Entry OVP Recovery OVP Startup Full Load Full Load Full Load VDS 100V/div. VDS 100V/div. VDS 100V/div. VOUT1 10V/div. VFB 2V/div. VCC 10V/div. VOUT1 10V/div. VFB 2V/div. VCC 10V/div. VOUT1 10V/div. VFB 2V/div. VCC 10V/div. OCP Protection Pro Protection Full Load VDS 100V/div. VIN=85V, 160V Protection,Full Load VPRO 100V/div. VCC 10V/div. VFB 2V/div. VDS 1V/div. HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 9 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER BLOCK DIAGRAM Vcc Power Management Extra Protection PRO Driving Signal Management Drv OVP FSET Frequency Control OTP OLP FB Fault Management Burst Mode Control NC SCP GND Peak Current Compression Current Comparator CS Figure 1: Functional Block Diagram HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 10 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER OPERATION The HFC0310 incorporates all the necessary features to build a reliable switch-mode power supply. Its high level of integration requires very few external components. It has burst-mode operation to minimize the stand-by power consumption at light load. Protection features— such as auto-recovery for over-load protection (OLP), short-circuit protection (SCP), over-voltage protection (OVP), or thermal shutdown (TSD) for over-temperature protection (OTP)—contribute to a safer converter design without increasing circuit complexity. PWM Operation The HFC0310 is a fully integrated converter with adjustable-frequency peak-current-mode control PWM switching regulators. The output voltage is measured at FB through a resistive voltage divider, amplifier, and optocoupler. The voltage at the FB pin is compared to the internally measured switch current to control the output voltage. The integrated MOSFET turns on at the beginning of each clock cycle. The current in the inductor increases until it reaches the value set by the FB voltage, and then the integrated MOSFET turns off. Vcc Regulation Occurs Here Auxiliary Winding Takes Charge 12 V 9.3 V Drain Switching Pluses Figure 2: VCC UVLO The lower threshold of VCC under-voltage lock-out (UVLO) decreases from 9.3V to 6.2V when fault conditions occur, such as OLP, OVP, and OTP. Soft-Start To reduce stress on the primary MOSFET and the secondary diode during start-up and to smoothly establish the output voltage, the HFC0310 has an internal soft-start circuit that gradually increases the primary current sense threshold, which determines the MOSFET peak current during start-up. The pulse-width of the power switching device progressively increases to establish optimal operating conditions until the feedback control loop takes charge. Start-Up and VCC UVLO During start-up, the IC only consumes the start up current (typically 12µA), and the current supplied through the start-up resistor charges the VCC capacitor. The IC starts switching and the current increases to 1mA when VCC reaches 12V. At this point, the transformer’s auxiliary winding powers the IC. When VCC falls below 9.3V, the regulator stops switching and the current through the start up resistor charges the VCC capacitor again. Soft Start VCS Figure 3: Soft Start HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 11 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER Switching Frequency The capacitor between the FSET pin and GND sets the switching frequency of the HFC0310. Estimate the oscillator frequency as per the equation below: fS = 1 400 × 10 −9 0.87 + C× 53 × 10 −6 the switching pulse of the MOSFET. Hence switching loss at no load or light load conditions is greatly reduced. Figure 4 shows the signals generated by burstmode operation. Hz VFB 0.7V Over Voltage Protection Monitoring the VCC pin via a 20µs time constant filter allows the HFC0310 to enter OVP during an over-voltage condition; typically when VCC goes above 24.5V. The controller will resume operation after the fault disappears. Over-Current Protection The HFC0310 continuously monitors the FB pin. When FB pulls up to 3.8V, if after a 8192 switching cycle delay the fault signal is still present, the HFC0310 shuts down as soon as the power supply undergoes an overload. When the fault disappears, the power supply resumes operation. Short-Circuit Protection By monitoring the CS pin, the HFC0310 shuts down when the voltage rises higher than 1.65V, to indicate a short circuit. The HFC0310 enters a safe low-power mode that prevents any lethal thermal or stress damage. As soon as the fault disappears, the power supply resumes operation. Thermal Shutdown When the temperature of the IC exceeds 150°C, the OTP is activated and the controller enters auto-recovery mode. Burst Operation To minimize stand-by power consumption, the HFC0310 implements burst mode at no load or light load. As the load decreases, the FB voltage decreases. The IC stops switching when the FB voltage drops below the lower threshold, VBRUL (0.5V). Then the output voltage drops at a rate dependent on the load. This causes the FB voltage to rise again due to the negative feedback control loop. Once the FB voltage exceeds the upper threshold, VBRUH (0.7V), the switching pulse resumes. The FB voltage then decreases and the whole process repeats. Burstmode operation alternately enables and disables 0.5V VDS Figure 4: Burst-Mode Operation PRO Pin The PRO pin provides extra protection against abnormal conditions. Use the PRO pin for input OVP and/or other protections. If the PRO pin voltage exceeds 3.25V, the IC shuts down. As soon as the fault disappears, the power supply resumes operation. Leading-Edge Blanking (LEB) In normal operation, a shunt resistor between the Source pin and Ground senses the primary peak current. The FB voltage sets the turn-off threshold of the MOSFET, VSENSE=VFB/3. When the shunt resistor voltage drops to VSENSE, the MOSFET turns off. During start-up and over-load condition, the primary peak current threshold is internally limited to 0.95V even if VFB voltage exceeds 2.85V to avoid excessive output power and lower the switch voltage rating. HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 12 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER In order to avoid turning off the MOSFET by mistriggered spikes shortly after the switch turns on, the IC implements a 350ns leading-edge blanking period. During blanking time, any trigger signal on the source pin is blocked. Figure 5 shows the primary-current–sense waveform and the leading-edge blanking. Figure 5: Leading-Edge Blanking Design Example The following is a design example using the application guidelines for the given specifications: VIN VOUT1 VOUT2 VOUT3 fSW 85V to 420V 12V 8V 8V 100kHz The detailed application schematic is shown in Figure 6. The typical performance and circuit waveforms have been shown in the Typical Performance Characteristics section. For more possible applications of this device, please refer to the related Evaluation Board datasheets. HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 13 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER TYPICAL APPLICATION CIRCUITS R26 L L 85Vac~420Vac Input CX1 RV1 TVR14471KS42Y D1 1N4007 D2 1N4007 R6 2.2M/1206 C1 R2 1M/1206 LX1 C2 R3 7448640415/10mH 1M/1206 D3 1N4007 R4 1M/1206 R5 2.2M/1206 N1 C3 D5 2.2nF R9 R10 SMAJ190A 374k/1206374k/1206 R7 2.2M/1206 R8 2.2M/1206 N4 D6 FR107 N3 B1100/100V/1A C14 D7 1N4148 R18 10k R22 510k/1206 Q1 FQP2N90 D8 MUR160 R23 510k/1206 R13 5.1M/1206 C4 22pF 6 C5 1nF 7 R14 100k/1206 R15 100k/1206 C6 1nF CS DRV PRO NC GND VCC 8 FB HFC0310 FSET 4 VOUT3: 8V/50mA B1100/100V/1A C16 R28 NS C17 CY1 R29 1k 2.2nF R16 1k U2 R19 3.3/1%/1206 3 R24 R20 510k/1206 2.2/1%/1206 R32 38.3k/1% R30 2k R25 2.2/1206 U1 5 R27 NS C15 GND2 R17 51 R12 10M/1206 GND1 VOUT2: 8V/0.2A D11 N2 2 R11 10M/1206 C13 C12 D10 R21 510k/1206 D4 1N4007 VOUT1: 12V/0.8A D9 MURS320/200V/3A C11 N5 L RT1 L1 T1 R1 1M/1206 N C10 10/1206 2.2nF/250V PC817A R31 C18 20k 10nF 2 1 C8 C9 U3 TL431K/2.5V C7 560pF R33 10k/1% Figure 6: Typical Application Schematic HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 14 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER FLOW CHART Start Charge Vcc capacitor through start up reistor Y Auxiliary winding supply the IC Vcc>12V N Vcc Decrease to6.2V Shut off the Switching Pulse Y Vcc <9.3V Y TSD= Logic High? N Y N Logic Low? N Y Y VCC >24.5V Soft Start Thermal Monitor N Pin PRO Monitor Monitor Vcc Monitor VFB Y VFB<0 .5 V 0.5V<VFB<3.8V Fixed switching frequency operation Switch Off VFB>3.8 V 8192 counter ? and OLP =Logic High Y N Continuous Fault Monitor OLP= Logic High UVLO, TSD, OLP & OVP is auto restart. N VFB>0 .7V Y HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 15 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER SIGNAL EVOLUTION IN THE PRESENCE OF FAULTS Vcc Start up Regulation Occurs Here Over Voltage Occurs Here Norm al operation Norm al operation Norm al operation Norm al operation 12V 9.3V 6. 2V Driver Pluses 8192 Switchin g cycl e delay Driver Fault Flag Norm al operati on OVP Fault Occurs Here Norm al operati on OLP Fault Occurs Here Normal operati onTSD Fault Occurs Here Normal operati onPRO Fault Occurs Here Normal operati on HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 16 HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER PACKAGE INFORMATION SOIC8 0.189(4.80) 0.197(5.00) 8 0.050(1.27) 0.024(0.61) 5 0.063(1.60) 0.150(3.80) 0.157(4.00) PIN 1 ID 1 0.228(5.80) 0.244(6.20) 0.213(5.40) 4 TOP VIEW RECOMMENDED LAND PATTERN 0.053(1.35) 0.069(1.75) SEATING PLANE 0.004(0.10) 0.010(0.25) 0.013(0.33) 0.020(0.51) 0.0075(0.19) 0.0098(0.25) SEE DETAIL "A" 0.050(1.27) BSC SIDE VIEW FRONT VIEW 0.010(0.25) x 45o 0.020(0.50) GAUGE PLANE 0.010(0.25) BSC 0o-8o 0.016(0.41) 0.050(1.27) DETAIL "A" NOTE: 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.004" INCHES MAX. 5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA. 6) DRAWING IS NOT TO SCALE. NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. HFC0310 Rev. 1.01 www.MonolithicPower.com 6/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 17