Vishay push white LED driver with multiple protection features

Days ago, VishayIntertechnology announced the launch of Inc., designed for LED driver solution. Both SiP12510 and SiP12511 are equipped with an internal integrated power switch and operate on the 1.25MHz high frequency conversion oscillator. This allows the use of small inductors, thereby reducing the required board space. This comprehensive LED driver solution incorporates several protection features, including overvoltage protection and 0.55A cycle by cycle current limit, up to three parallel strings, each 20mA. By closing the device when the internal temperature exceeds a typical temperature threshold of 165 DEG C, the thermal shutdown block provides another protective layer. To achieve full control of the luminous intensity of LED, SiP12510 and SiP12511 support can be adjusted LED on current linear and PWM techniques. By gradually increasing the switching current limit, the built-in three-phase soft start function can reduce the peak current required during startup. Each device were implemented by low 0.1V feedback voltage and close the switch frequency, can be used in -40 to +85 DEG C throughout the industrial operating temperature range to achieve higher conversion efficiency. Due to the combination of efficiency, less than 90% of the 1 A turn off current and small occupying area, portable application of SiP12510 and SiP12511 is especially suitable for limited space and battery power, such as mobile phone, PDA and digital camera. At present, the new SiP12510 and SiP12511 samples have been available, production quantities have been in the second quarter of 2007, orders delivery cycle for 13 weeks.

Source: the world of electronic products