LNK615DG-TL

The LNK615 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 tight output voltage and current regulation, compensating for transformer and internal parameter tolerances along with input voltage variations.

The device incorporates a 700 V power MOSFET, a novel ON/OFF control state machine, a high-voltage switched current source for self biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry onto a monolithic IC.

• Dramatically Simplifies CV/CC Converters
  • Eliminates optocoupler and all secondary CV/CC control circuitry
  • Eliminates all control loop compensation circuitry
• Advanced Performance Features
  • Compensates for transformer inductance tolerances
  • Compensates for input line voltage variations
  • Compensates for cable voltage drop (LNK61X series)
  • Compensates for external component temperature variations
  • Very tight IC parameter tolerances using proprietary trimming technology
  • Frequency jittering greatly reduces EMI filter cost
  • Even tighter output tolerances achievable with external resistor selection/trimming
  • Programmable switching frequency up to 85 kHz to reduce transformer size
• Advanced Protection/Safety Features
  • Auto-restart protection reduces power delivered by >95% for output short-circuit and control loop faults (open and shorted components)
  • Hysteretic ther