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SC4810EITMLRT bảng dữ liệu(PDF) 14 Page - Semtech Corporation

tên linh kiện SC4810EITMLRT
Giải thích chi tiết về linh kiện  High Performance Current Mode PWM Controller with Complementary Output, Programmable Delay
PDF  24 Pages
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nhà sản xuất  SEMTECH [Semtech Corporation]
Trang chủ  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4810EITMLRT bảng dữ liệu(HTML) 14 Page - Semtech Corporation

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 2004 Semtech Corp.
www.semtech.com
SC4810A/B/C/D/E
POWER MANAGEMENT
Application Information (Cont.)
FB
GND
R1
VREF
R2
Vout
VBias
R3
R4
R5
SC431
Fig.9 Cycle-by-cycle over-current limitation
)
3
........(
V
3
.
1
V
2
V
CS
FB
+
•
=
)
4
........(
R
R
R
V
V
2
1
2
REF
FB
+
•
=
Synchronization
SC4810 features a special synchronization function
which is leading-edge triggered with a threshold set to
2.1V. Applications like multi-phase interleaving can be
achieved using the SYNC pin. When the SYNC pin is con-
nected to the RCT pin of the master SC4810, the out-
puts of the two SC4810’s will be out of phase. The fre-
quency of the master SC4810 clock signal should be at
least 30% faster than that of the slave SC4810 for the
guaranteed synchronization. SYNC pin should be
grounded if synchronization is unused. (The patent for
the synchronization scheme is pending).
The synchronous function is illustrated as in Fig. 10.
VRCT
t
3V
0V
Clock Signal of the Master SC4810
0V
2.1V
0V
t
t
OUT1 of the Master SC4810
OUT1 of the Slave SC4810
Fig. 10 Illustration for Synchronization



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