Infineon – XDPL8218 – High power factor constant voltage flyback IC with secondary-side regulation for cost-effective LED driver
The XDPL8218 is a digital, highly integrated, future-proof device. It combines a constant voltage quasi-resonant flyback controller with algorithms for high power factor and low THD. Main application field for XDPL8218 is for dual stage designs with a DC-DC stage at secondary side and XDPL8218 as primary side. The device manages wide load ranges and reacts fast and stable to dynamic load changes. The digital core of the XDPL8218 enables high efficiency over wide output power range. The multi-mode operation with quasi-resonant switching at high power, discontinuous conduction mode for frequency reduction at medium power and active burst mode at low power enables this.
Features
- Programmable constant voltage output with secondary-side regulation
- Supports AC and DC input
- Nominal input voltage range 100 VAC – 277 VAC or 127 VDC – 430 VDC
- Reference board efficiency > 90%
- Power factor > 0.9 and THD < 15% over wide load range
- Standby power < 100 mW
- Temperature guard with adaptive thermal management with on-chip sensor
- Digital control selects automatically best mode of operation, depending on actual requirements
- QRM (Quasi-resonant mode)
- DCM (Discontinuous conduction mode)
- ABM (Active burst mode)
- Tunable, digital parameters
- Configurable brown-out and brown-in protections
- Embedded digital filters
- Relevant error conditions are monitored and protected (Undervoltage / Overvoltage / Open load / Output shorted)
Benefits
- Enables the design of high performance and innovative value LED driver with small effort
- Reduced BoM minimizes system cost and increases flexibility
- High reliability features improve lifetime of the driver
- Fast design cycles reduce time to market and efforts for value prod-ucts
- Supply chain efficiency optimizes stock keeping and enables high flexibility
Target applications
- LED driver with constant voltage secondary-side regulation
Competitive advantage
- User settable parameters offer big flexibility
- Small standby power consumption < 100 mW
- Extensive set of configurable protection mechanisms
- Power supply for external devices with an Auxiliary winding control algorithm
Intern: LEDDRV
