Silan launch power LED driver IC
Hangzhou Silan Microelectronics Co. Inc. has introduced a high performance, high reliability, high power green light-driven solutions for core chip —- 6 ~ 36V input, 1A High Power LED Driver IC SD42524. The chip Silan for green energy products BCD process technology development of high-performance, single-chip integrated LDMOS power switch, built-in PWM dimming modules and multiple protection features for the buck, constant current LED driver type circuit with high efficiency, suitable for LED lights and LED solar lights and other LED lighting.
SD42524 using current-mode control with fast transient response and loop stability of simple design, good constant current characteristic. When the input voltage was varied between 6 ~ 36V or LED load change from 1 ~ 6, the chip rate of change of output current can be controlled within ± 1%, user-friendly application of different voltage or LED under load application settings output current. As the chip Silan advanced BCD process, and the internal use of the high-precision trimming technology, the chip output current consistency, different batches of chips to control the output current differences within the ± 2%.
The chip uses an advanced system architecture, system efficiency, conversion efficiency up to 96%. Single-chip integrated LDmos pipe with less than 0.3 on-resistance, making chips in the power tube's conduction cycle reduced conduction losses, while similar products of the chip industry's lowest voltage of 88mV sample, thus greatly improve the efficiency of energy conversion circuit. Because efficient chips, coupled with the SOP-8 package form, the die heat of small, excellent thermal performance.
SD42524 PWM dimming using an internal voltage regulator technology. PWM dimming of high precision, compared with analog dimming, LED color does not appear the phenomenon of migration, meet at 100Hz ~ 2kHz range from 0 to 100% dimming requirements. Chip integrated LDO, produced VDD voltage MCU can be used as a dimming power | voltage regulator so that the customers in the system development process more convenient.
In addition, the chip features built-frequency shaking, to ensure the chip in a small oscillation frequency within the jitter of the concentration of spectral energy diversification, reduce the external radiation in a single frequency, thus improving the system's EMI characteristics simplifies EMI design. In addition, the chip integrates a temperature protection circuit, thermal compensation circuit, limiting the multiple circuit protection circuit, LED lamps to ensure the normal work environment, to extend its service life.
The chip can be applied to AC input DC input and the typical applications. DC input typical application, a register of wide input voltage range of 6V ~ 36V, 1A maximum output current can be. Input voltage of 24V, it can cascade 6 LED, the system is very small external components, requires only 7 components, is suitable for 24V power supply. AC input MR16 spotlights in a typical application, the input voltage range AC12 ~ 24V, only 11 external components required.
Silan is of a few to several areas in the special process mode of operation of the circuit design IDM companies, since 2001, has worked in Hangzhou Economic and Technological Development Zone Xiasha established two integrated circuit chip production lines, has invested huge funds for a special process research and development, the current 0.8-micron BiCMOS / BCD process technology platform, the new device structure has achieved a leading R & D achievements, has established a cross-platform technology and design technology capacity building. These advanced systems integration capacity-building will help Silan advantage in power semiconductor technology products group formation.
SD42524 introduction of enriched Silan of LED lighting driver circuit product line. Before Silan has launched series of drive products with different specifications to meet a variety of LED lighting applications, such as used in miner's lamp led the SD42351, used MR16 spotlights SD42509, SD42511, etc. used in landscape lighting.
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