PowTech (China Resources Silicon Wei), Angbao OB, SY Silicon Lijie, BPS Jingfeng, CL Xinlian, XL Xinlong, Ou Chuangxin OCX and other brands, Ruixinsheng has a large number of stock in stock?;_ PT4516NH is a dual channel High-precision linear LED driver chip with single-segment linear architecture and no EMI problems. System Peripheral

No magnetic components such as inductors or transformers are required, and the entire system has a simple structure and low cost.

Start-up Voltage (OUTx) The PT4516 operating voltage is provided by the OUTx pin. When the OUTx pin voltage is higher than GNDx to the chip turn-on voltage, the PT4516 starts to work

to achieve constant current control. The constant current driver (OUTx, REXTx) chip can accurately set the LED output current through the REXTx resistor.

PT4516NH overheating adjustment function;_ PT4516NH has overheating adjustment function, when the chip is overheated (>135℃typ.), it will gradually reduce the output current, so as to control the output power and temperature rise,

Keep the die temperature at a constant value to improve system reliability. The output current is reduced to a maximum of one-fourth of the set output current at the time of thermal drop current

one. The system will continuously detect the chip temperature. When the chip temperature drops below 135°C (typ.), the system current will return to normal. When the chip temperature exceeds

The chip turns off the output at 160℃(typ.). The system will continuously detect the chip temperature. When the chip temperature drops below 140°C (typ.), the system can restart.

resume normal work.

High voltage drop current function (OVPx) The PT4516NH has a high voltage drop current function. When the OVPx pin voltage of the chip is too high (>80V typ.), it will gradually reduce the output current and make the output current.

The power is kept at an approximately constant value to improve the stability of the system. The output current is reduced to a maximum of one third of the set output current at high drop current.

The system will continuously detect the OVPx pin voltage, when the OVPx pin voltage drops below 80V (typ.), the system current returns to normal. Overvoltage drop required

The OVPx pin can be shorted with the OUTx pin when the streaming function is used, and the OVPx pin can be left unconnected when this function is not needed.