DIO8650ECST6

Rev 1.1 DIO8650E Single Stage Fly-back & PFC Controller With Primary Side Control For LED Lighting Features Descriptions Primary side control eliminates the The DIO8650E is a single stage Fly-back and PFC opto-coupler controller targeting at LED lighting applications. Valley turn-on of the primary MOSFET to achieve lower switching losses The DIO8650E is a primary side controller without Power factor >0.95 @230VAC applying any secondary feedback circuit for low THD < 10% @230VAC cost, and drives the Fly-back converter in the Reliable short LED and Open LED protection quasi-resonant mode to achieve higher efficiency. Quick start up:V VIN,OVP, then set VIN=15V 1.6 2 2.5 mA IQ Quiescent Current No switching 0.26 mA IVIN Operation current CL=100pF,f=15kHz 0.36 mA Error Amplifier Section VREF Internal reference voltage 0.294 0.3 0.306 V ZCS pin Section VZCS，OVP ZCS pin OVP voltage threshold 1.5 V VFAST_ST Fast start up threshold 0.55 V Current limit reference voltage 0.45 V K2 CC Feed forward coefficient 0.1 RK2 CC Feed forward resistor RK2 340 Ω 15.7 µs Leading edge blanking time 300 ns TOFF,MAX Max OFF time 151 µs TLEB.ZCD ZCD Blanking Time 2 µs 115 kHz Current Sense Section(Source PIN of integrated MOSFET) VCS.LMT PWM Section TON.MAX TLEB fMAX Max on time COMP high clamp After turn off Maximum switching frequency Gate Driver VGATE_CLAMP Output Clamp Voltage VCC=20V 12 V TRISING rising time from 10% to 90% CLOAD=1nF 410 ns TFALLING falling time from 90% to 10% CLOAD=1nF 50 ns 150 °C Thermal Section TSD www.dioo.com Thermal Shutdown Temperature © 2017 DIOO MICROCIRCUITS CO., LTD DIO8650E• Rev. 1.1 Single Stage Flyback & PFC Controller With Primary Side Control For LED Lighting Electrical Characteristics DIO8650E Figure 3 Typical fly-back application www.dioo.com © 2017 DIOO MICROCIRCUITS CO., LTD DIO8650E• Rev. 1.1 Single Stage Flyback & PFC Controller With Primary Side Control For LED Lighting Typical Application DIO8650E Application Information Start up After AC or DC supply is powered on, the capacitor CVIN across VIN and GND pin is charged up by BUS voltage through a start up resistor RST. Once VVIN rises up to VVIN-ON, the internal blocks start to work and PWM output is enabled. Shut down After AC supply or DC BUS is powered off, the energy stored in the BUS capacitor will be discharged. When the auxiliary winding of Fly-back transformer can’t supply enough energy to VIN pin, VVIN will drop down. Once VVIN is below VVIN-OFF, the IC will stop working and VCOMP will be discharged to zero. Primary-side constant-current control Primary side control is applied to eliminate secondary feedback circuit or opto-coupler, which reduces the circuit cost. www.dioo.com © 2017 DIOO MICROCIRCUITS CO., LTD DIO8650E• Rev. 1.1 Single Stage Flyback & PFC Controller With Primary Side Control For LED Lighting Figure 4 Typical buck-boost application DIO8650E QR mode operation provides low turn-on switching losses for Fly-back converter. Over Voltage Protection (OVP) & Open LED Protection (OLP) The output voltage is reflected by the auxiliary winding voltage of the Fly-back transformer, and both ZCS pin and VIN pin provide over voltage protection function. When the load is null or large transient happens, the output voltage will exceed the rated value. When VVIN exceeds VVIN,OVP or VZCS exceeds VZCS,OVP, the over voltage protection is triggered and the IC will discharge VVIN by an internal current source IVIN,OVP. Once VVIN is below VVIN,OFF, the IC will shut down and be charged again by BUS voltage through start up resistor. If the overvoltage condition still exists, the system will operate in hiccup mode. Short Circuit Protection (SCP) When the output is shorted to ground, the output voltage is clamped to zero. The voltage of the auxiliary winding is proportional to the output winding, so valley signal cannot be detected by ZCS. Without valley detection, MOSFET cannot be turned ON until maximum off time tOFF,MAX is matched. If MOSFET is turned ON by tOFF,MAX 64 times continuously, IC will be shut down and enter into hiccup mode. If the output voltage is not low enough to disable valley detection in short condition, VVIN will dropdown without auxiliary winding supply. Once VVIN is below VVIN,OFF, the IC will shut down and be charged again by the BUS voltage through the start up resistor. If the short circuit condition still exists, the system will operate in hiccup mode. www.dioo.com © 2017 DIOO MICROCIRCUITS CO., LTD DIO8650E• Rev. 1.1 Single Stage Flyback & PFC Controller With Primary Side Control For LED Lighting Quasi-Resonant Operation DIO8650E COMMON DIMENSIONS (UNITS OF MEASURE=MILLIMETER) Symbol MIN NOM MAX A 1.25 A1 0 0.15 A2 1.00 1.10 1.20 A3 0.60 0.65 0.70 b 0.36 0.50 b1 0.36 0.38 0.45 c 0.14 0.20 c1 0.14 0.15 0.16 D 2.826 2.926 3.026 E 2.60 2.80 3.00 E1 1.526 1.626 1.726 e 0.90 0.95 1.00 e1 1.80 1.90 2.00 L 0.35 0.45 0.60 L1 0.59REF L2 0.25BSC R 0.10 R1 0.10 0.25 Θ 0° 8° Θ1 3° 5° 7° Θ2 6° 14° www.dioo.com © 2017 DIOO MICROCIRCUITS CO., LTD DIO8650E• Rev. 1.1 Single Stage Flyback & PFC Controller With Primary Side Control For LED Lighting Physical Dimensions: SOT-23-6 DIO8650E COMMON DIMENSIONS (UNITS OF MEASURE=MILLIMETER) Symbol MIN NOM MAX A 1.35 1.55 1.75 A1 0.10 0.15 0.25 A2 1.25 1.40 1.65 A3 0.50 0.60 0.70 b 0.38 0.51 b1 0.37 0.42 0.47 c 0.17 0.25 c1 0.17 0.20 0.23 D 4.80 4.90 5.00 E 5.80 6.00 6.20 E1 3.80 3.90 4.00 e 1.27BSC L 0.45 0.60 0.80 L1 1.04REF L2 0.25BSC R 0.07 R1 0.07 h 0.30 0.40 0.50 0° 8° Θ 15° 17° 19° Θ1 11° 13° 15° Θ2 15° 17° 19° Θ3 11° 13° 15° Θ4 www.dioo.com © 2017 DIOO MICROCIRCUITS CO., LTD DIO8650E• Rev. 1.1 Single Stage Flyback & PFC Controller With Primary Side Control For LED Lighting Physical Dimensions: SOIC-8 DIO8650E Dioo is a professional design and sales corporation for high-quality and performance analog semiconductors. The company focuses on industry markets, such as, cell phone, handheld products, laptop, and medical equipment and so on. Dioo’s product families include analog signal processing and amplifying, LED drivers and charger IC. Go to http://www.dioo.com for a complete list of Dioo product families. For additional product information, or full datasheet, please contact with our Sales Department or Representatives. www.dioo.com © 2017 DIOO MICROCIRCUITS CO., LTD DIO8650E• Rev. 1.1 Single Stage Flyback & PFC Controller With Primary Side Control For LED Lighting CONTACT US