MT7930 Просмотр технического описания (PDF) - Unspecified
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MT7930 Datasheet PDF : 8 Pages
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Maximizing IC Performance
MT7930
Single Stage, High PFC, AC-DC LED Driver
threshold, and then the system will be re-started.
It is highly recommended to set up the VDD
voltage between 12V and 16V by designed a
proper Na to Ns ratio of the transformer.
Short-circuit Protection
The short-circuit protection is triggered if the
DSEN pin voltage is detected below 200mV for a
continuous time of 640us. The gate drive
switching will be turned off, and a restart process
will be kicked off when the VDD voltage drops
below the UVLO threshold.
This re-start process will repeat if the short-circuit
condition continues to exist.
Over-current Protection
MT7930 immediately turns off the power
MOSFET once the voltage at CS pin exceeds
2.2V. This cycle by cycle current limitation
scheme prevents the relevant components, such
as power MOSFET, transformer, etc. from
damage.
MT7930 Rev. 1.30
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Copyright © 2011 Maxic Technology Corporation
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