Holtek HT7L2102/7L2103 Isolated Universal LED Light Control and Driver IC

11/21/2011

After the successful release of its AC-DC converter power management and Non-isolated LED light driver ICs, Holtek is now delighted to announce the release of its new isolated universal step down LED light control and driver ICs, the HT7L2102 and HT7L2103.

The HT7L2102 and HT7L2103 are both control devices with cycle by cycle current control, peak current control and pulse width modulation power functions. Protection functions include Short Circuit Protection, Over Voltage Protection, Soft-Start and Over Temperature Protection. The additional inclusion of a Frequency Jitter function for EMI suppression, brings with it EMI reductions of 5~8dB and resulting EMI cost- savings. The HT7L2102 and HT7L2103 include an integrated advanced Green Mode for power saving, allowing users to drive a variety of LED strings and a number of load conditions only a circuit design which will not lower conversion efficiency. This greatly reduces the cost and results in faster product development cycles. The devices also have an integrated PWM dimming interface.

The HT7L2102 is especially designed for T8/T9 lamp applications, with excellent constant current capability. It has an input voltage range of Vac = 90V~265V and can maintain the current to within 1%. The over temperature protection function uses an external thermistor sensor which can be located in any possible system hot spots to achieve the best over temperature protection.

The HT7L2103 is especially designed for E26/E27 bulb applications. The E26/E27 bulb mechanism space is small, so the HT7L2103 is integrated with more features to achieve isolated AC-DC power-driven functions in a limited space. In the Primary-Side Feedback framework and with a full voltage input (Vac = 90V ~ 265V), the excellent constant current capability can maintain the current change to within 5%. The HT7L2103 over-temperature protection is integrated in the IC without an external thermistor, which enables the HT7L2103 to meet the requirements of low cost and high security over temperature protection.