Built-in MOS input 8-85V tube lights do buck constant current drive power

Shenzhen Electronics Co. Senliweier Efficient LED Driver IC fixed Toff technical design, using a unique anti-jamming technology, the LED brightness is more stable. CMOS process design, integration of the built-in voltage regulator, undervoltage protection, thermal protection, Saturation Protection, RC oscillator, dimming controller, the system controller and output drive module. In the input voltage to 85VDC range 8VDC efficient drive high brightness LED. By setting an external resistor ROSC pin to adjust the system frequency; external high-brightness LED string driven by a constant current to maintain and improve LED brightness LED reliability, its current value by CS terminal external resistor. Isolation or quarantine can be controlled, continuous or discontinuous and other types of converters. When the internal power MOSFET is turned on, depending on the type of converter, the primary inductor or transformer or inductive energy storage portion of the energy directly to the LED string or array; when the internal power MOSFET is turned off, the energy stored in the inductor converted to LED's drive current. Voltage (VDD side) higher than VUVLO, internal power station opened, this time by limiting the external transformer primary inductance or inductor peak current mode of work. External current sense resistor and the internal power source is connected to the tube, when the voltage value of the external sense resistor exceeds a set value (internally set to 210mv), turn off the internal power MOSFET.