Improved specs on UVLO and hysteresis provide more predictable start-up and shutdown
The BCT3843 control IC provides pin-for-pin replacement of the industry standard UC3843 series of devices. The devices are redesigned to provide significantly improved tolerances in power supply manufacturing. The 2.5 V reference has been trimmed to 1.0% tolerance. The oscillator discharge current is trimmed to provide guaranteed duty cycle clamping rather than specified discharged current. The circuit is more completely specified to guarantee all parameters impacting power supply manufacturing tolerances.
In addition, the oscillator and flip-flop sections have been enhanced to provide additional performance. The RT/CT pin now doubles as a synchronization input that can be easily driven from open collector/open drain logic inputs. This sync input is a high impedance input and can easily be used for externally clocked systems.
The BCT3843 requires less than 0.5mA of start-up current over the full temperature range.
Relevant Support for the BCT3843
Below is the support information available for the BCT3843 - select a link to download the relevant documentation.
DATA-0454
- Product Datasheet Datasheet for the BlueChips BCT384x range of Current Mode Power Supply Control ICs Dated : 14 January 2009 ( Uploaded ) Relevant to : BCT3842 / BCT3843 / BCT3844 / BCT3845
Relevant News for the BCT3843
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