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L6564T Arkusz danych(PDF) 8 Page - STMicroelectronics

Numer części L6564T
Szczegółowy opis  10-pin transition-mode PFC controller
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6564T Arkusz danych(HTML) 8 Page - STMicroelectronics

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Pin connection
L6564T
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Doc ID 022671 Rev 1
6PFC_OK
PFC pre-regulator output voltage monitoring/disable function. This pin senses the output
voltage of the PFC pre-regulator through a resistor divider and is used for protection purposes.
If the voltage on the pin exceeds 2.5 V the IC stops switching and restarts as the voltage on the
pin falls below 2.4 V. However, if at the same time the voltage of the INV pin falls below 1.66 V,
a feedback failure is assumed. In this case the device is latched off. Normal operation can be
resumed only by cycling Vcc. bringing its value lower than 6 V before moving up to the turn-on
threshold.
If the voltage on this pin is brought below 0.23 V the IC is shut down. To restart the IC the
voltage on the pin must go above 0.27 V. This can be used as a remote on/off control input.
7ZCD
Boost inductor’s demagnetization sensing input for transition-mode operation. A negative-going
edge triggers MOSFET’s turn-on.
8
GND
Ground. Current return for both the signal part of the IC and the gate driver.
9GD
Gate driver output. The totem pole output stage is able to drive power MOSFET’s and IGBT’s
with a peak current of 600 mA source and 800 mA sink. The high-level voltage of this pin is
clamped at about 12 V to avoid excessive gate voltages.
10
Vcc
Supply voltage of both the signal part of the IC and the gate driver. Sometimes a small bypass
capacitor (0.1 µF typ.) to GND might be useful to get a clean bias voltage for the signal part of
the IC.
Table 3.
Pin description (continued)
Name
Function


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