Κωδικός: LNK 625 PG

LNK625PG OFF LINE SWITCHER IC DIP-8C

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

·          Very tight IC parameter tolerances using proprietary trimming technology

·          Continuous and/or discontinuous mode operation for design flexibility

·          Frequency jittering greatly reduces EMI filter cost

·          Even tighter output tolerances achievable with external resistor selection/trimming

 

Advanced Protection/Safety Features

·          Auto-restart protection reduces delivered power by >95% for output short-circuit and all control loop faults (open and shorted 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

·          Easily meets all global energy efficiency regulations with no added components

·          ON/OFF control provides constant efficiency down to very light loads – ideal for mandatory EISA and ENERGY STAR 2.0 regulations

·          No primary or secondary current sense resistors – maximizes efficiency

 

Green Package

Halogen free and RoHS compliant package

 

Applications

·          DVD/STB

·          Adapters

·          Standby and auxiliary supplies

·          Home appliances, white goods and consumer electronics

·          Industrial controls

 

Description

The LinkSwitch^TM-CV dramatically simplifies low power, constant voltage (CV) converter design through a revolutionary control technique which eliminates the need for both an optocoupler and secondary CV control circuitry while providing very tight output voltage regulation. The combination of proprietary IC trimming and E-Shield™ transformer construction techniques enables Clampless™ designs with the LinkSwitch-CV LNK623/4.

LinkSwitch-CV provides excellent cross-regulation for multiple-output flyback 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.

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