New AC-DC converter power management ICs from Holtek

Holtek has released two new AC to DC converter power management devices, the HT7A3942 and HT7A6003.

Holtek says the HT7A3942 and HT7A6003 are presently the only devices in the world which are fully pin compatible with the UC3842. Holtek claims both the ICs perform better than UC3842 in terms of low operating and standby current specifications, operate with a Green Mode nor operate at very low temperatures. The additional functions of HT7A3942 such as extra low operating and standby current specifications, a non-audible noise Green Mode extra low temperature operating specifications (-40? for normal operation), short circuit protection etc. Designers using UC3842 can use ICs from Holtek without altering any of the circuits. The new Holtek devices also meet with Energy Star 2.0 specifications with an input voltage range of 90~265 VAC and less than 0.3W of standby power for an application power range of between 0~250W.

Holtek says the additional external components required by the UC3842 to implement functions such as slope compensation and leading edge blanking are fully integrated within the HT7A3942, allowing it to only require 55% of the external BOM count required by that of the UC3842.

The other functions of Holtek Ics include suppression of EMI , frequency jitter,soft-start function,over-voltage protection. Suggested HT7A6003 includes LCD TVs, LED TVs, UPS products and E-bike chargers etc.