FM8301/8201 series is a high-precision step-down constant current LED control chip, which integrates high-voltage MOS tube and JFET high-voltage power supply function. Non-isolated step-down LED power supply for full range of input voltage from 85Vac to 265Vac.

FM8301? Features:

1. No VCC startup capacitor, no startup resistor

2. Internal integrated 500V power MOSFET

3. Inductor current critical continuous mode

4. ±5%_LED output current accuracy

5. LED short circuit protection

7. Chip power supply under-voltage protection

8. Overheat regulation function

9. Packaged in SOP7

FM8301 constant current principle: detect the peak current of the inductor cycle by cycle. The internal current comparator input connected to the CS end is compared with the internal 500mV reference voltage. When the CS voltage reaches the internal detection threshold, the power tube is turned off. The constant current function is realized by constant inductor peak current and cycle-by-cycle detection current control system operating in critical mode. ?

FM8301 JFET power supply and Vcc startup:

After the system is powered on, the bus voltage charges the Vcc capacitor through the JFET. When the VCC voltage reaches the chip turn-on threshold of 6.6V, the chip's internal control circuit starts to work. When the chip is working normally, the required working current is still provided to it through the internal JFET. In order to ensure sufficient power supply for the chip, it is recommended that the input and output voltage difference be greater than 30V. .

Shenzhen Ruixinsheng Technology is an agent for sales of LED driver IC/power IC, MOS tube. Agent distribution: MPS, Richtek, Macroblock (MBI accumulation),

Silan Micro, Fuman PowTech, China Resources Silicon Wei, Angbao OB, BPS Jingfeng and other brands, Ruixinsheng has a large number of spot stocks and technical support.

Contact Yang Sheng 13823608717 QQ: 1732328706?