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MCR03EZPFX1002 bảng dữ liệu(PDF) 15 Page - International Rectifier

tên linh kiện MCR03EZPFX1002
Giải thích chi tiết về linh kiện  HIGHLY EFFICIENT INTEGRATED SYNCHRONOUS BUCK REGULATOR FOR DDR APPLICATIONS
PDF  32 Pages
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nhà sản xuất  IRF [International Rectifier]
Trang chủ  http://www.irf.com
Logo IRF - International Rectifier

MCR03EZPFX1002 bảng dữ liệu(HTML) 15 Page - International Rectifier

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Rev 16.0
15
PD-97660
IR3831WMPbF
Thermal Shutdown
Temperature
sensing
is
provided
inside
IR3831W. The trip threshold is typically set to
140oC. When trip threshold is exceeded, thermal
shutdown
turns
off
both
MOSFETs
and
discharges the soft start capacitor.
Automatic restart is initiated when the sensed
temperature drops within the operating range.
There is a 20oC hysteresis in the thermal
shutdown threshold.
Power Good Output
The IC continually monitors the output voltage via
Feedback (Fb pin). The Power Good signal is
flagged when the Fb pin voltage is above 0.5V
and between 85% to 115 % of Vp. This pin is
open drain and it needs to be externally pulled
high. High state indicates that output is in
regulation. Fig. 8a shows the PGood timing
diagram for non-tracking operation. In this case,
during startup, PGood goes high after the SS
voltage reaches 2.1V if the Fb voltage is within
the PGood comparator window. Fig. 8a. and Fig
8b. also show a 256 cycle delay between the Fb
voltage entering within the thresholds defined by
the PGood window and PGood going high.
Fig.8a IR3831W Non-Tracking Operation
TIMING DIAGRAM OF PGOOD FUNCTION
Fig.8b IR3831W Tracking Operation



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