Non-isolated LED candle lamp solution based on QX6102

     QX6102 is a high-precision step-down high-power LED constant current driver chip with self-powered function . It is suitable for non-isolated LED constant current power supply with full range input voltage of AC 85Vac~265Vac and output current within 250mA.

　　The chip adopts a self-powered structure, does not require an auxiliary winding, and has a built-in NPN transistor, providing high cost performance.

　　Patented high-end current detection, fixed frequency, current mode PWM control method, with excellent linear regulation rate and load regulation rate. The chip adopts a unique constant current control method,

　　The chip integrates frequency jitter function to reduce EMI cost. Built-in loop compensation and slope compensation, no external compensation required, simple application design.

　　QX6102 has multiple protection functions, including LED open/short circuit protection, cycle-by-cycle current limiting protection, input power supply undervoltage protection and power clamping.

　　Program Features

　　1. The periphery is simple, only 8 components are needed to complete the design, and the I-shaped inductor design can be used, which has obvious cost advantages.

　　2. High constant current accuracy ≤1%

　　3. High conversion efficiency ≥92%

　　4. Output without flicker

　　5. Can replace high-voltage linear constant current drive solution

Typical application diagram