LYT6067C-TL Power Integrations

LYTSwitch-6 Family Flyback CV/CC LED Driver IC with Integrated 650 V / 725 V MOSFET and FluxLink Feedback Product Highlights Highly Integrated, Compact Footprint Up to 94% efficiency across full load range SR FET Incorporates a multi-mode Quasi-Resonant (QR) / CCM / DCM flyback controller, 650 V or 725 V MOSFET, secondary-side control and synchronous rectification driver Integrated FluxLink, HIPOT-isolated, feedback link Exceptional CV/CC accuracy, independent of transformer design or D V external components LYTSwitch-6 Adjustable accurate output current sense using external sense resistor Optional VOUT Primary FET Current and Controller Sense EcoSmart Energy Efficient S BPP IS Secondary Less than 15 mW no-load including line sense (without PF front end) Control IC Designs using LYTSwitch-6 easily meet Energy Star and all global lighting energy efficiency regulations PI-8375-072817 Low heat dissipation Figure 1. Typical Application/Performance. Advanced Protection / Safety Features Input line OV with auto-restart Output fault OVP/UVP with auto-restart Open SR FET gate detection Input voltage monitor with accurate brown-in Thermal foldback ensures that power continues to be delivered (lower level) at elevated temperatures Full Safety and Regulatory Compliance Reinforced insulation Figure 2. High Creepage, Safety-Compliant InSOP-24D Package. Isolation voltage >4000 VAC 100% production HIPOT compliance testing UL1577 and TUV (EN60950) safety approved Green Package Output Power Table Halogen free and RoHS compliant 380 VDC / Applications 277 VAC 15% 85-305 VAC 2 450 VDC 3 Product Isolated off-line LED driver 1 1 1 Open Frame Open Frame Open Frame Smart LED lighting High-voltage flyback post regulator LYT6063C/6073C 15 W 12 W 25 W Description LYT6065C/6075C 30 W 25 W 40 W The LYTSwitch-6 series family of ICs dramatically simplifies the development and manufacturing of off-line LED drivers, particularly LYT6067C/6077C 50 W 45 W 60 W those in compact enclosures or with high efficiency requirements. The LYTSwitch-6 architecture is revolutionary in that the devices LYT6068C 65 W 55 W incorporate both primary and secondary controllers, with sense Table 1. Output Power Table. elements and a safety-rated feedback mechanism into a single IC. Notes: 1. Minimum continuous power in a typical non-ventilated and PCB size measured Close component proximity and innovative use of the integrated at 40 C ambient. Max output power is dependent on the design. With communication link, FluxLink, permit accurate control of a secondary- condition that package temperature must be < 125 C. side synchronous rectification MOSFET with Quasi-Resonant switching 2. With 725 V FET only. of primary integrated high-voltage MOSFET to maintain high efficiency 3. Package: InSOP-24D. across the entire load range. www.power.com June 2018 This Product is Covered by Patents and/or Pending Patent Applications. FWD SR GND BPS FBLYTSwitch-6 DRAIN INPUT PRIMARY BYPASS (D) OVERVOLTAGE (V) (BPP) PRIMARY BYPASS REGULATOR ENABLE ENABLE FAULT AUTO-RESTART PRIMARY LINE COUNTER GATE BYPASS PIN RESET BPP/UV INTERFACE UNDERVOLTAGE PRIMARY BPP/UV BYPASS PIN PRIM-CLK CAPACITOR SELECT AND OV CURRENT VSHUNT OSCILLATOR/ V LIMIT ILIM V GATE BP+ TIMERS JITTER t t ON(MAX) OFF(BLOCK) THERMAL GATE SHUTDOWN GATE OV PRIM/SEC FAULT SecREQ BPP From AUTO-RESTART SecPulse SenseFET Secondary PRIM/SEC Power Controller Q S MOSFET Q R Sec- RECEIVER DRIVER FAULT CONTROLLER BPP/UV t LEB OFF(BLOCK) I S PRIM-CLK ILIM + AUTO-RESTART PRIMARY OVP V - ILIM t ON(MAX) PI-8388-020618 SOURCE (S) Figure 3. Primary Controller Block Diagram. FORWARD SYNCRONOUS RECTIFIER DRIVE OUTPUT VOLTAGE (FWD) (SR) (VOUT) SR CONTROL REGULATOR FORWARD 4.4 V INH ENABLE SECONDARY BPS UV VOUT SR BYPASS (BPS) 4.4 V DETECTOR S Q 3.8 V + Q R SR THRESHOLD QR HANDSHAKE/ SECONDARY FAULT DETECTION OVP CONTROL INH DCM To FEEDBACK Primary (FB) Receiver FEEDBACK INH DRIVER VREF QR FEEDBACK COMPENSATION Ts MAX THERMAL t OFF(MIN) FOLDBACK t OSCILLATOR/ SECINH(MAX) TIMER t SS(RAMP) SECONDARY ISENSE GROUND (IS) (GND) PI-8045e-020618 Figure 4. Secondary Controller Block Diagram. 2 Rev. E 06/18 www.power.com - + - + - + - +