XDPL8218 | XDP™ control IC for cost-effective, dual-stage LED drivers with constant voltage secondary-side regulation and a secondary-side DC/DC converter

Overview

The XDPL8218 integrates a constant voltage quasi-resonant digital flyback XDP™ controller with algorithms for high power factor and low THD. Main application field for XDPL8218 digital control IC for LED drivers are dual-stage designs with a DC-DC stage at secondary side and XDPL8218 as primary side. The control IC manages wide load ranges and reacts fast and stable to dynamic load changes. The digital core of the XDPL8218 control IC enables high efficiency over wide output power range. A comprehensive parameter set allows the adaptation of the circuit to a wide set of LED driver features.

Summary of Features

Programmable constant voltage output with secondary-side regulation
Supports AC and DC input
Nominal input voltage range 100V_AC – 277V_AC or 127V_DC – 430V_DC
Reference board efficiency >90%
Power factor >0.9 and THD <15% over wide load range
Standby power <100mW
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

The XDPL8218 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 products
Supply chain efficiency optimizes stock keeping and enables high flexibility

Potential Applications