LNK6407D-TL

LinkSwitch™-3 family of ICs dramatically simplifies low power CV/ CC charger designs by eliminating an optocoupler and secondary control circuitry. The device introduces a revolutionary control technique to provide very accurate output voltage and current regulation, compensating for transformer and internal parameter tolerances along with input voltage variations. The device incorporates 725V power MOSFET, novel ON/OFF control state machine, high-voltage switched current source for self-biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry onto monolithic IC. It compensates for transformer inductance tolerances, input line voltage variations, cable voltage drop and external component temperature variations. Auto-restart protection reduces power delivered by <gt/>90% for output short-circuit and control loop faults (open/shorted components). Used in chargers for cell/cordless phones, PDAs, MP3/portable audio devices, adapters, etc.

• Output power of 7.5W (adapter), 7.5W (open frame) at 90-264VAC
• Energy efficient, accurate primary side regulation CV/CC switcher for adapters and chargers
• Dramatically simplifies CV/CC converters, EcoSmart™ energy efficient
• Eliminates optocoupler, all secondary CV/CC control and all control loop compensation circuitry
• Very accurate IC parameter tolerances using test trimming technology
• Easily meets all global energy efficiency regulations with no added components
• No-load consumption at 230VAC input with bias winding <lt/>30mW, hysteretic thermal shutdown
• No current sense resistors, maximizes efficiency, frequency jittering reduces EMI filter cost
• Meets high-voltage creepage requirements between DRAIN and all other pins both on PCB and at package
• Minimum operation frequency fixed to improve transient load response