DK812 is a single-stage AC-DC converter control chip, the chip integrates 700V high voltage switching power transistor and primary peak current detection circuit, the chip also contains active power factor correction, primary feedback constant current, output voltage control and Self-powered circuit, and has an automatic detection of LED load circuit, which can effectively prevent damage to the LED load, the chip using highly integrated MOS circuit design, few external components, transformer design is simple, isolated output circuit transformer only two windings, Non-isolated output circuit transformer requires only one winding; integrated active power correction circuit, can achieve very high power factor and very low harmonic distortion

DK812 - 6W primary side feedback single stage active PFC LED driver chip
Shenzhen East Branch Semiconductor Co., Ltd. Http: www.dkpower.cn TEL: 4008-781-212 1
Functional description
DK812 is a single-stage AC-DC converter control chip, the chip integrates 700V high voltage switching power tube and
Primary peak current detection circuit, the chip also contains active power factor correction, primary feedback constant current, the output limit
Voltage control and self-powered circuit, and has an automatic detection of LED load circuit, can effectively prevent the LED load loss
Bad, chip using highly integrated MOS circuit design, few external components, transformer design is simple, isolated transmission
The circuit of the transformer requires only two windings, the non-isolated output circuit of the transformer requires only one winding;
Of the active power correction circuit, can achieve very high power factor and very low harmonic distortion.
Features
Can be easily composed of a variety of different constant current limit circuit
Automatic detection of constant current load on power, can effectively prevent the power burned LED lights
Quasi-resonant work, high circuit efficiency η> 90%
Full voltage input 85V-265V
Single-stage active PFC, high PFC (PF> 0.95), low THD
Built-in 700V high voltage switching power tube
Patented primary feedback control algorithm, without auxiliary windings
Patented self-powered technology, no external winding power supply
± 3% LED output current accuracy
Over temperature, overcurrent, overvoltage, LED open / short circuit protection
Application areas
6-32W LED lighting