The LNK420EG dramatically simplifies implementation of LED drivers requiring long lifetime, high efficiency, PF >0.9, and TRIAC dimming capability(LNK403-410). The single-stage combined power factor and constant-current controller eliminates a switching stage and the electrolytic bulk capacitor. The advanced primary-side control used by the LNK420EG device provides accurate constant current control while eliminating the need for an optocoupler and current sensing circuits. LinkSwitch-PH incorporates a 725 V power FET, a continuous-mode PWM controller, a high-voltage switched current source for self biasing, frequency jittering, protection circuitry including cycle-by-cycle current limit and hysteretic thermal shutdown.
Features:-
• Single-stage combination of power factor correction and accurate constant-current (CC) output
• Enables very long lifetime designs (no electrolytic capacitors)
• Eliminates optocoupler and all secondary current control circuitry
• Eliminates control loop compensation circuitry
• Simple primary-side PWM dimming interface
• Universal input voltage range
Specification:-
| Symbol | Parameter | Min | Type | Max | Units |
| ICD2 | Drain Supply Current | 0.5 | 0.85 | 1.2 | m A |
| VV | Voltage Monitor Pin Voltage | 2.75 | 3 | 3.25 | V |
| VV(REM) | Remote ON/OFF Threshold | 0.5 | V | ||
| DCMAX | Maximum Duty Cycle | 90 | 99.9% |
* product image for illustration purposes only. actual product may vary.
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