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1. Application Scenarios
The LED driver power supply provides constant current/constant voltage driving for LED lighting, covering indoor lighting (10W-100W), outdoor lighting (50W-300W), smart street lights, plant lighting, etc.
2. System Architecture
Typical topology: AC input → rectifier bridge → PFC (single-stage/two-stage) → DC/DC (flyback/LLC) → constant current output → LED load
3. The Role of the Product in the System
| Product Category | System Function |
| Rectifier bridge | AC input full bridge rectification |
| SBD (Schottky) | Low voltage output rectification (<100V) |
| Fast recovery diode | RCD absorption circuit, or high-voltage output rectification |
| SiC diode | Outdoor high-power LED driver PFC level |
4. Recommended Product Model
| Product Category | Recommended Series/Model | Key Parameters |
| Surface mounted rectifier bridge | MBxS/DBxS series (0.5A-2A/600V-1000V) | Suitable for compact design |
| Direct insertion rectifier bridge | GBU/KBP series (2A-35A/600V-1000V) | Suitable for outdoor high-power applications |
| SBD (Schottky) | 45V–200V SBD（2A–30A） | Low voltage output rectification, VF low |
| Fast recovery diode | FRxx series (600V) | RCD absorption or auxiliary power supply |
5. AC/DC Module Application
● LED drivers typically use single-stage PFC flyback (<100W) or PFC+LLC two-stage scheme (>100W)
● The combination of rectifier bridge, MOSFET, and output SBD is the core component
6. Application of PFC Circuit
● Single stage PFC flyback: simultaneously implementing PFC and DC/DC, with fewer components and better cost
● Two level solution: PFC Boost+LLC, high efficiency, suitable for high power
7. Common Customer Needs
| Demand | Our Response |
| To pass the ErP energy efficiency command (standby<0.5W) | Recommend low starting current MOSFET and optimized control IC |
| Outdoor power sources should be protected against lightning strikes (4kV/6kV) | Provide surge resistance test data for rectifier bridge |
| No flicker requirement (mobile phone shooting) | Recommend a two-stage PFC solution with low ripple output |
| To be compatible with global wide voltage (90-305VAC) | Recommended wide voltage input MOSFET and rectifier bridge |
