OB6683CGPA

OB6683 High Performance TM PFC/QR Combo Controller GENERAL DESCRIPTION FEATURES OB6683 integrates a transition mode power factor correction (TM PFC) controller and a QuasiResonant (QR) controller in one chip. The PFC controller provides a cost effective solution for optimizing the power factor. The QR controller provides higher efficiency and lower EMI compared to conventional PWM system. OB6683 provides high level integration and high performance than conventional PFC/PWM system. The built-in TM PFC controller optimizes power conversion efficiency with reduced system cost. The intelligent PFC switching ON and OFF, zero current detection and frequency limitation mechanism enable a better efficiency under any load conditions. OB6683 features many built-in green functions to optimize power conversion efficiency at all power levels. This holds for QR operation at high power levels, as well as PFM operation at lower power levels, and ‘Extended Burst Mode’ operation at very low power or zero power (Standby) levels. At low power levels, OB6683 can turn off the PFC stage. In this way, low standby together with low system cost can be achieved. The device is also integrated many functions of protection, such as X-CAP discharge, Brownin/out protection, VCC Under Voltage Lockout (UVLO), Cycle-by-Cycle Current Limiting for PFC and QR Stage (OCP), Output Over Voltage Protection for PFC and QR Stage (OVP), Open Loop Protection for PFC and QR Stage (OLP), Programmable Over Temperature Protection (OTP), Built-in Soft Start in QR Stage, VCC Over Voltage Protection, Gate Clamp , Pin Floating Protection, and External Latch Triggering, etc. Therefore it can protect the system from damage due to occasional failure. OB6683 is offered in SOP-16 packages. ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ©On-Bright Electronics Integrated PFC Controller and QR Controller Transition Mode PFC Controller Multi-Mode Operation for QR Stage Line Voltage Compensation for QR Stage Enhanced Dynamic Response for PFC Stage PFC Light Load Turn Off Control Audio Noise Free Operation External Latch Triggering for Both Converters Minimum OFF time for Ringing Suppression Maximum ON Time Limit for QR Stage Built-in 4ms Soft Start for QR Stage Internal Leading Edge Blanking for QR Stage Internal Leading Edge Blanking for PFC Stage Built-in X-CAP Discharge PROTECTIONS ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Output Over Voltage Protection for PFC stage Output Over Voltage Protection for QR stage Output Diode Short Protection for QR stage VCC Over Voltage Protection Under Voltage Lockout with Hysteresis Over Load Protection for QR stage Cycle-by-Cycle Current Limiting for PFC stage Cycle-by-Cycle Current Limiting for QR stage Brownout Protection (BOP) Programmable Over Temperature Protection Internal Over Temperature Protection APPLICATIONS Offline AC/DC flyback converter for ■ General LED Lighting ■ LCD Monitor/TV/PC ■ Notebook ■ ACDC High Power Adapter ■ Open Frame SMPS Confidential -1- Preliminary Datasheet OB_DOC_DS_668300 OB6683 High Performance TM PFC/QR Combo Controller TYPICAL APPLICATION ©On-Bright Electronics Confidential -2- Preliminary Datasheet OB_DOC_DS_668300 OB6683 High Performance TM PFC/QR Combo Controller GENERAL INFORMATION Pin Configuration The pin map of OB6683 SOP16 package is shown as below. 1 HV VCC 16 2 NC GND 15 3 FB QRGATE 14 4 PRT PFCGATE 13 5 LATCH/OTP PFCCS 12 6 COMP QRCS 11 7 PFCON/OFF TIMER 10 8 ZCD Absolute Maximum Ratings Parameter HV input Voltage VCC input Voltage FB Input Voltage PRT Input Voltage LATCH/OTP Input Voltage COMP Input Input Voltage PFCON/OFF Input Voltage ZCD Input Voltage PFCINV Input Voltage TIMER Input Voltage QRCS Input Voltage PFCCS Input Voltage Min/Max Operating Junction Temperature T J Min/Max Storage Temperature T stg Lead Temperature (Soldering, 10secs) -40 to 150 ℃ -55 to 150 ℃ 260 ℃ Note: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute maximum-rated conditions for extended periods may affect device reliability. PFCINV 9 Ordering Information Part Number Description 16 Pin SOP, Halogen free in OB6683CGP Tube 16 Pin SOP, Halogen free in OB6683CGPA T&R Package Dissipation Rating RθJA Package (℃/W) SOP16 99 Value -0.3 to 700V 30V -0.3 to 7V -0.3 to 7V -0.3 to 7V -0.3 to 7V -0.3 to 7V -0.3 to 7V -0.3 to 7V -0.3 to 7V -0.3 to 7V -0.3 to 7V Recommended operating condition Symbol Parameter Range VCC VCC Supply Voltage 12 to 25V RθJC (℃/W) 14 Marking Information OB6683 TM PFC/QR Combo Controller XX X Package Package Halogen free CG:SOP16 ©On-Bright Electronics X Confidential 3 P:Halogen-free Packing Blank:Tube A: Tape/Reel Preliminary Datasheet OB_DOC_DS_668300 OB6683 High Performance TM PFC/QR Combo Controller YWWZZZ OB6683 Ps Y: Year Code WW: Week Code (01-52) ZZZ: Lot Code P:Halogen-free s: Internal code TERMINAL ASSIGNMENTS Pin Num Pin Name I/O 1 HV I 2 NC 3 FB I 4 5 6 7 8 PRT LATCH/OTP COMP PFCON/OFF ZCD I I/O I/O I/O I 9 PFCINV I 10 11 12 13 14 15 16 TIMER QRCS PFCCS PFCGATE QRGATE GND VCC I/O I I O O P P ©On-Bright Electronics Description Connected to the line input via resistors and diodes for startup and xcap discharge, this PIN allows the brownout detection as well. No connect. Feedback input pin. The PWM duty cycle of QR stage is determined by voltage level into this pin and the current-sense signal at QRCS pin Zero current detection and over voltage protection for QR stage External latch protection pin. Output of the error amplifier for PFC voltage loop compensation Threshold voltage setting for PFC ON/OFF loading control Zero current detection for PFC stage. Inverting input of the error amplifier (EA). The information at the output of the PFC stage is fed to the pin through a resistor divider. Timer setting for open loop protection and PFC light load turn off. QR stage current sense input pin. PFC current sense input. PFC stage totem pole gate driver output. QR stage totem pole gate driver output. Ground Chip power supply pin. Confidential -4- Preliminary Datasheet OB_DOC_DS_668300 OB6683 High Performance TM PFC/QR Combo Controller BLOCK DIAGRAM ©On-Bright Electronics Confidential -5- Preliminary Datasheet OB_DOC_DS_668300 OB6683 High Performance TM PFC/QR Combo Controller ELECTRICAL CHARACTERISTICS (T A = 25℃, VCC=20V if not otherwise noted) Symbol Parameter High Voltage Supply (HV pin) High-Voltage Current IHV1 Source for VCC startup High-Voltage Current IHV2 Source for VCC startup X-Cap Discharge IHVXCAP Current VBNI Brown-in level VBNO Brown-out level Supply Voltage (VCC pin) I_VCC_op Operation current with switching Test Conditions VCC =5V, Measure current into VCC VCC=0.5V,Measure current into VCC Typ Max 2 Unit uA 0.85 mA 3 mA HV resistor=20k ohm HV resistor=20k ohm 79 70 V V VDD=20V,FB=2V,measure I(VCC),when two gates switching 2.5 mA VCC under voltage Lockout Enter VCC under voltage UVLO(OFF) lockout exit VCC over voltage Slowly ramp VCC, until no VCC_OVP protection enter gate switching. Restart time for TD_rst protection occurs PFCONOFF Voltage (PFCONOFF pin) Source current of I_PFCONOFF PFCONOFF V_PFCONOFF PFCOFF voltage R PFCONOFF =20K ohm Over Temperature Protection (LATCH/OTP pin) Output current of I_OTP LATCH/OTP pin VTH_OTP_in OTP Enter Trip level V TH_OTP_off OTP Exit Trip level On Chip OTP (Internal Thermal Shutdown) Tshutdown OTP Level Trecovery OTP exit PFC Section Error Amplifier Voltage Feedback Input Vinv Threshold Source current of VAC>180V PFCINV Iinv_source Source current of VACVth2, Figure 1), the system operates in QR mode. The frequency varies depending on the line voltage and the load conditions. Therefore, the system may actually work in DCM when 130KHz frequency clamping is reached. System design should be optimized such that the operation frequency is within the range specified at full loading conditions and in universal AC line input range. ■ At light load condition (Vth1