Huarun silicon launch PT4115 LED lamp driver circuit

Huarun silicon technology (Shanghai) Co., Ltd. launched a new PT4115 green lighting LED lamp driver circuit. PT4115 is a continuous inductive current mode step-down constant current source, it has a wide range of input voltage of DC 8V to 30V, the breakdown voltage of >45V, output 200mA, 1200mA constant DC, can meet the requirement of 1-7 series light driven high power LED or N a series parallel low power LED constant current drive. The size can be set according to the application program.

PT4115 uses frequency jitter technique effectively improves the EMI; from the full range down to zero by the PWM dimming, safe and reliable, the dimming ratio can reach 5000:1; using the SOT89-5 package, the tube core chip (Die) can be directly connected to the metal plate through the outer package (ExposedPAD) heat conduction is very effective. PT4115 internal temperature protection function (TSD), in order to ensure stable and reliable operation of the system. When the IC chip temperature exceeds 160 degrees, IC will enter the TSD protection state and stop the current output, and when the temperature is lower than 140 DEG C, IC will be restored to the working state.

The principle of PT4115 can use analog dimming and LED temperature on the current negative feedback LED dynamic temperature control in the lamp, as long as the optical (DIM) with a thermistor or a PN junction can be. Coupled with the rectifier bridge PT4115 can be applied to AC 12V, 24V power supply LED lamps. PT4115 application is very simple, peripheral parts only four. PT4115 efficiency of up to 97%, is the true green drive IC. PT4115 is widely used in the use of LED lights MR11, MR16, water lights, street lamps and other LED lamps.

In order to effectively shorten the design cycle of LED lighting manufacturers, Huarun powtech one step promotion model provided can be used directly in DEMO board, MR16 production of the circuit diagram, PCB board map, BOM table to the LED lamp manufacturers, and for the first time with customers to provide timely and thoughtful technical support.

Source: automotive electronics design