Power Integrations LYTSwitch-2 Primary-Side Regulation Switcher ICs
Power Integrations LYTSwitch-2 Primary-Side Regulation CC/CV Switcher ICs dramatically simplify low power CC LED drivers by eliminating the optocoupler and secondary control circuitry. They introduce a revolutionary control technique to provide accurate output current regulation, compensating for transformer and external component variations, and device parameter tolerances as well as input voltage variations. Power Integrations LYTSwitch-2 incorporates a high-voltage switching MOSFET, a novel ON/OFF control state machine, a high-voltage switched current source for self-biasing, frequency jitter to reduce EMI, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry into a monolithic IC.
Features
- Controller automatically compensates for
- Transformer inductance variation
- External component changes with temperature
- Input line voltage variations
- Small-size designs
- Eliminates the optocoupler and secondary CC control circuitry
- Eliminates control loop compensation circuitry
- Frequency jittering greatly reduces EMI filter cost
- Programmable switching frequency reduces transformer size
- 725V switching power MOSFET enables clampless flyback designs
- Advanced protection/safety features
- Auto-restart protection reduces power delivered by >90% for output short-circuit and control loop faults (open and short-circuit components)
- Hysteretic thermal shutdown - with automatic recovery
- Reduced field returns
- Meets high-voltage creepage requirements between DRAIN and all other pins both on the PCB and at the package
- EcoSmart™ - energy efficient
- No-load consumption <30mW
- No current sense resistors - maximizes efficiency
Applications
- LED bulbs
- Down lights
- Luminaires
- Ballasts
- T8 tubes
Videos
Functional Block Diagram
Related Products
Power Integrations LYTSwitch-3 Single-Stage LED Driver ICs
Ideal for single-stage power factor corrected constant current LED bulbs and downlighters.
公開: 2014-06-11
| 更新済み: 2022-03-11