CV/CC Switcher 7-Pin PDIP-B

LinkSwitch is specifically designed to replace low power linear transformer/RCC chargers and adapters at equal or lower system cost with much higher performance and energy efficiency. LNK500 is a lower cost version of the LNK501 with a wider tolerance output CC characteristic. LinkSwitch introduces a revolutionary patented topology for the design of low power switching power supplies that rivals the simplicity and low cost of linear adapters, and enables a much smaller, lighter, and attractive package when compared with the traditional “brick.” With efficiency of up to 75% and <300 mW no-load consumption, a LinkSwitch solution can save the end user enough energy over a linear design to completely pay for the full power supply cost in less than one year. LinkSwitch integrates a 700 V power MOSFET, PWM control, high voltage start-up, current limit, and thermal shutdown circuitry, onto a monolithic IC.

• Minimum Power Output : 3.2 W
• Typical : 4 W
• No-Load Input Power : <300 mW
• Lowest cost and component count, constant voltage (CV) or constant voltage/constant current (CV/CC) solution
• Extremely simple circuit configuration
• Up to 75% lighter power supply reduces shipping cost
• Primary based CV/CC solution eliminates 10 to 20 secondary components for low system cost
• Combined primary clamp, feedback, IC supply, and loop compensation functions – minimizes external components
• Fully integrated auto-restart for short circuit and open loop fault protection – saves external component costs
• 42 kHz operation simplifies EMI filter design