DIO8242F2TC3

Rev 1.3 DIO8242F2 Adaptive 100/120Hz Current Ripple Remover Max Input Current ≤ 120mA Features   Descriptions Regulator for adaptive 100/120Hz current DIO8242F2 is a regulator for driving internal ripple remove NMOSFET to remove the 100/120Hz LED string Built-in zener diode for input voltage current ripple on AC/DC power. clamping  Built-in 100V power MOSFET Patented control strategies are optimized for  Programmable amplitude LED current ripple remover current ripple. Nover circuit design  Programmable maximum cathode voltage of makes a lower BOM and high cost-effective for LED flickerless filament.  Programmable maximum LED current  Optimized for TRIAC dimming, 1% brightness without flicker  The current ripple is less than ±1%  SOT23-3，SOT89-3 and SOT223 packages Applications  LED lighting Ordering Information Order Part Number Top Marking TA Package DIO8242F2ST3 2013 Green -40 to 125°C SOT23-3 Tape & Reel,3000 DIO8242F2TC3 2013 Green -40 to 125°C SOT89-3 Tape & Reel,2500 DIO8242F2TD3 2013 Green -40 to 125°C SOT223 Tape & Reel,2500 www.dioo.com © 2019 DIOO MICROCIRCUITS CO., LTD DIO8242F2• Rev. 1.3 DIO8242F2 SOT23-3 VC SOT89-3/SOT223 1 3 GND LEDN 2 1 2 3 VC LE D N GND Figure 1 Top View Pin Descriptions Name GND VC LEDN www.dioo.com Description Power Ground LED Current Ripple Programming Connect to the Cathode of LED string © 2019 DIOO MICROCIRCUITS CO., LTD DIO8242F2• Rev.1.3 Adaptive 100/120Hz Current Ripple Remover Max Input Current ≤ 120mA Pin Assignment DIO8242F2 Stresses beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other condition beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameter Rating Unit 100 V -0.3 to 6 V Junction Temperature 150 °C Lead Temperature 260 °C -65 to 150 °C LEDN VC Storage Temperature Thermal Resistance / θJA Thermal Resistance / θJC SOT23-3 220 SOT89-3 80 SOT223 50 SOT23-3 130 SOT89-3 25 SOT223 20 °C/W °C/W Recommend 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. DIOO does not Recommend exceeding them or designing to Absolute Maximum Ratings. Parameter LEDN Junction Temperature (TJ) Under point VLEDN Power consumption www.dioo.com Rating Unit < 100 V 125 °C 0.8~1.2 V SOT23-3 < 250 SOT89-3 < 650 SOT223 < 800 mW © 2019 DIOO MICROCIRCUITS CO., LTD DIO8242F2• Rev.1.3 Adaptive 100/120Hz Current Ripple Remover Max Input Current ≤ 120mA Absolute Maximum Ratings DIO8242F2 Typical value: Vcc=3.6V, TA=25°C, unless otherwise specified. Symbol Parameter IST Conditions Min. Typ. Max. Unit 1 uA Start-up Current VREF LEDN Compare Voltage ICLMT LED Current Limit RDSON MOS Rdson BV Breakdown Voltage 6 V 120 8 100 mA Ω V Specifications subject to change without notice. Typical Performance Characteristics CVC=1μF, CEC=8.2μF, unless otherwise specified. LED Current Ripple without DIO8242F2 (VAC=220V,VLED=250V,ILED=15mA) AC Source Power ON (VAC=120V,VLED=125V,ILED=15mA) www.dioo.com LED Current Ripple with DIO8242F2 (VAC=220V,VLED=250V,ILED=15mA) AC Source Power OFF (VAC=120V,VLED=125V,ILED=15mA) © 2019 DIOO MICROCIRCUITS CO., LTD DIO8242F2• Rev.1.3 Adaptive 100/120Hz Current Ripple Remover Max Input Current ≤ 120mA Electrical Characteristics DIO8242F2 Function Description DIO8242F2 is designed for driving one LED string and removing the 100/120Hz LED current ripple. Theory of Operation The LED string and DIO8242F2 are both supplied by an AC/DC current source. The drain of internal NMOSFET is connected to the cathode of LED string. A sensing resistor Rcs is connected between the source of NMOSFET and GND. DIO8242F2 drives NMOSFET to transfer the LED current ripple to voltage ripple on NMOSFET, and ensures the constant voltage across LED string and the constant current flow through LED string. The scalable adaptive function of DIO8242F2 can regulate the cathode voltage of LED string to minimum to improve the efficiency of the system. Current Ripple Removing The capacitor CC between VC and GND is an integral capacitor. DIO8242F2 transform the voltage on Cc to a reference voltage. The current regulator regulates LED current via negative feedback control. CC should be large enough in order to remove the current ripple of the LED string. However, too large capacitor may slow down the dynamic response. www.dioo.com © 2019 DIOO MICROCIRCUITS CO., LTD DIO8242F2• Rev.1.3 Adaptive 100/120Hz Current Ripple Remover Max Input Current ≤ 120mA Block Diagram DIO8242F2 DIO8242F2 controls the voltage on CC by monitoring the operation state of built-in N-MOSFET. The efficiency of system is relatively low when N-MOSFET always works in the saturation region. DIO8242F2 detects it and charges CC to raise the VVC and ILED, then the output voltage of power supply is reduced, and the voltage drop on N-MOSFET decreases. Conversely, when N-MOSFET is working in the linear region, LED current regulation loop is open. DIO8242F2 detects it and discharges CC to reduce the VVC and ILED, then the output voltage of power supply is raised, and the LED current regulation loop is closed. PCB Design Guideline 1. DIO8242F2 should be placed far away from the power devices for better thermal performance. 2. The area of LED current loop should be as small as possible. Application Information DIO8242F2 design guide: IN+ LEDN DIO8242F2 VC GND IN- 1. The value of the capacitor between VC and GND can determine the final amplitude of the current ripple. It should be large enough in order to remove the current ripple of the LED string. However, too large capacitor may low down the dynamic response. www.dioo.com © 2019 DIOO MICROCIRCUITS CO., LTD DIO8242F2• Rev.1.3 Adaptive 100/120Hz Current Ripple Remover Max Input Current ≤ 120mA Adaptive Regulation DIO8242F2 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 0.05 R1 0.05 0.20 Θ 0° 8° Θ1 3° 5° 7° Θ2 6° 14° www.dioo.com © 2019 DIOO MICROCIRCUITS CO., LTD DIO8242F2• Rev.1.3 Adaptive 100/120Hz Current Ripple Remover Max Input Current ≤ 120mA Physical Dimensions: SOT23-3 DIO8242F2 www.dioo.com Symbol Min. NOM. Max. A 1.40 1.50 1.60 b 1.68 ‐ 1.77 b1 1.67 1.70 1.73 b2 0.38 ‐ 0.47 b3 0.37 0.40 0.43 b4 0.46 ‐ 0.55 b5 0.45 0.48 0.51 c 0.40 ‐ 0.44 c1 0.39 0.40 0.41 D 4.40 4.50 4.60 D1 4.35 4.45 4.55 D2 1.60 1.75 1.90 D3 0.75 0.90 1.05 D4 1.60 1.70 1.80 E 2.40 2.50 2.60 E1 2.13 ‐ 2.19 e 1.50BSC e1 3.00BSC H 4.05 ‐ 4.25 H1 2.70 ‐ 3.00 H2 0 ‐ 0.10 L 0.89 ‐ 1.20 θ1 6° 8° 10° θ2 3° 5° 7° θ3 85° 90° 95° © 2019 DIOO MICROCIRCUITS CO., LTD DIO8242F2• Rev.1.3 Adaptive 100/120Hz Current Ripple Remover Max Input Current ≤ 120mA Physical Dimensions: SOT89-3 DIO8242F2 COMMON DIMENSIONS (UNITS OF MEASURE=MILLIMETER) Symbol MIN NOM MAX A 1.80 A1 0.02 0.10 A2 1.50 1.60 1.70 A3 0.80 0.90 1.00 b 0.67 0.80 b1 0.66 0.71 0.76 b2 2.96 3.09 b3 2.95 3.00 3.05 c 0.24 0.35 c1 0.23 0.25 0.30 D 6.43 6.48 6.58 E 6.80 7.00 7.20 E1 3.30 3.38 3.53 e 2.25 2.30 2.35 e1 4.50 4.60 4.70 L 0.80 1.00 1.20 L1 1.81REF R 0.10 R1 0.10 Θ 0° 8° Θ1 10° 12° 14° www.dioo.com © 2019 DIOO MICROCIRCUITS CO., LTD DIO8242F2• Rev.1.3 Adaptive 100/120Hz Current Ripple Remover Max Input Current ≤ 120mA Physical Dimensions: SOT223 DIO8242F2 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 © 2019 DIOO MICROCIRCUITS CO., LTD DIO8242F2• Rev.1.3 Adaptive 100/120Hz Current Ripple Remover Max Input Current ≤ 120mA CONTACT US