Leadies released four white noise LED driver circuit of LDS8845 and LDS8846 samples

Leadis Technology Co. Ltd. (Leadis Technology, Inc.) announced that it can supply efficient sample products four white noise LED driver circuit of LDS8845 and LDS8846. This series is aimed at a new generation of low-cost mobile phones and portable devices with lower VF white light LED and lower cost TFT-LCD components.

Leadies LED Driver Senior Director Adolfo Garcia said: "leadies launched LDS8845 and LDS8846, for the latest trends in the market with the mobile phone application using low VF white LED. He added: low VF white LED can reduce the need to increase the drive output voltage when the built-in boost converter, easy to make LED current up to the absolute accuracy of the current and the accuracy of the circuit pairing. Current white LED drive products are commonly used in dual mode (1 times /2 times) or a three mode (1 times / 1.5 times / 2 times) charge pump converter. Reducing the boost converter means saving up to two ceramic capacitors at a cost. Other advantages include: (1) can reduce the whole circuit of Form Factor (up to 13%); (2) the LED driver does not produce noise; and (3) because the current battery supply device and the overall LED output current of the same amount, so compared with other competitors in each time after charging provide a longer battery life. "

Although this series of white LED driver design is simplified, but its performance is not inferior. The 7.5% series of all products corresponding to each part of LED are better than the current precision, circuit between the accuracy is better than that of 3%, dual mode or three mode charge pump compared to other white LED driver with a minimum of more than 25% increase. In order to reduce or eliminate the audio noise jamming devices, these two products provide real load off the output current, overload protection, protection and 100 kHz LED rated current control interface automatically shut down overheating.

For the lithium battery to 98% efficiency, LDS8845 and LDS8846 are using PowerLite current leadies patent regulator to maintain the voltage difference is less than 50 mv. The company's PCR technology is applied to this device, so that the new series of white LED driver LDS8845 and LDS8846 can operate at lower system power down voltage, and can still maintain excellent LED rectifier function.

Source: Electronic Engineering album