LNK624DG Power Integrations

LNK623-626 LinkSwitch-CV Family Energy-Efficient, Off-line Switcher with Accurate Primary-side Constant-Voltage (CV) Control * Product Highlights Dramatically Simplifies CV Converters Eliminates optocoupler and all secondary CV control circuitry Eliminates bias winding supply IC is self biasing Advanced Performance Features Compensates for external component temperature variations Wide Range High-Voltage Very tight IC parameter tolerances using proprietary trimming DC Input D technology FB Continuous and/or discontinuous mode operation for design LinkSwitch-CV BP flexibility S Frequency jittering greatly reduces EMI filter cost Even tighter output tolerances achievable with external resistor selection/trimming PI-5195-012915 Advanced Protection/Safety Features (a) Typical Application Schematic Auto-restart protection reduces delivered power by >95% for 5% V output short-circuit and all control loop faults (open and shorted O components) Hysteretic thermal shutdown automatic recovery reduces power supply returns from the field Meets HV creepage requirements between Drain and all other pins, both on the PCB and at the package EcoSmart Energy Efficient No-load consumption <200 mW at 230 VAC and down to below 70 mW with optional external bias PI-5196-012315 I O Easily meets all global energy efficiency regulations with no added (b) Output Characteristic components Figure 1. Typical Application Schematic (a) and Output Characteristic Envelope ON/OFF control provides constant efficiency down to very light (b). *Optional with LNK623-624PG/DG. (see Key Application Consider- loads ideal for mandatory EISA and ENERGY STAR 2.0 regulations ations section for clamp and other external circuit design considerations). No primary or secondary current sense resistors maximizes efficiency Output Power Table Green Package 230 VAC 15% 85-265 VAC Halogen free and RoHS compliant package 3 Peak or Peak or Product 1 1 Adapter Open Adapter Open Applications 2 2 Frame Frame DVD/STB LNK623PG/DG 6.5 W 9 W 5.0 W 6 W Adapters Standby and auxiliary supplies LNK624PG/DG 7 W 11 W 5.5 W 6.5 W Home appliances, white goods and consumer electronics LNK625PG/DG 8 W 13.5 W 6.5 W 8 W Industrial controls LNK626PG/DG 10.5 W 17 W 8.5 W 10 W Description Table 1. Output Power Table. Based on 5 V Output. TM The LinkSwitch -CV dramatically simplifies low power, constant voltage Notes: (CV) converter design through a revolutionary control technique which 1. Minimum continuous power in a typical non-ventilated enclosed adapter measured at +50 C ambient. eliminates the need for both an optocoupler and secondary CV control 2. Maximum practical continuous power in an open frame design with adequate circuitry while providing very tight output voltage regulation. The heat sinking, measured at 50 C ambient (see Key Application Considerations combination of proprietary IC trimming and E-Shield transformer section for more information). construction techniques enables Clampless designs with the 3. Packages: P: PDIP-8C, D: SO-8C. LinkSwitch-CV LNK623/4. LinkSwitch-CV provides excellent cross-regulation for multiple-output fl yback applications such as DVDs and STBs. A 725 V power MOSFET and ON/OFF control state machine, self-biasing, frequency jittering, cycle-by-cycle current limit, and hysteretic thermal shutdown circuitry are all incorporated onto one IC. Figure 2. PDIP-8C and SO-8C Packages. www.power.com August 2016 This Product is Covered by Patents and/or Pending Patent Applications. Auto-RestartLNK623-626 DRAIN (D) REGULATOR BYPASS 6 V (BP) + 6 V FB - 5 V + OUT Reset D Q STATE FEEDBACK V TH - MACHINE (FB) V ILIMIT t SAMPLE-OUT I Drive LIM DC MAX FAULT 6.5 V FB Auto-Restart Open-Loop THERMAL SHUTDOWN DC MAX SAMPLE t DELAY SAMPLE-OUT OSCILLATOR SOURCE (S) I LIM V SOURCE ILIMIT (S) Current Limit Comparator LEADING EDGE BLANKING PI-5197-012915 Figure 3 Functional Block Diagram. Pin Functional Description DRAIN (D) Pin: This pin is the power MOSFET drain connection. It provides internal P Package (DIP-8C) D Package (SO-8C) operating current for both start-up and steady-state operation. BYPASS (BP) Pin: This pin is the connection point for an external bypass capacitor for 1 8 FB 1 8 S FB S the internally generated 6 V supply. 7 2 S BP 2 7 BP S FEEDBACK (FB) Pin: 6 During normal operation, switching of the power MOSFET is S 6 S 4 5 controlled by this pin. This pin senses the AC voltage on the bias D S D 4 5 winding. This control input regulates the output voltage based on the S flyback voltage of the bias winding. SOURCE (S) Pin: This pin is internally connected to the output MOSFET source for PI-5198-012315 high-voltage power and control circuit common returns. Figure 4. Pin Configuration. 2 Rev. I 08/16 www.power.com - +