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LM2647 bảng dữ liệu(PDF) 23 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
tên linh kiện LM2647
Giải thích chi tiết về linh kiện  Dual Synchronous Buck Regulator Controller
PDF  25 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
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LM2647 bảng dữ liệu(HTML) 23 Page - National Semiconductor (TI)

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Bill of Materials
Designator
Function
Descrtiption
Type
Vendor
C1
Cin (Ch #2)
10µF, 25V, X7R
1812
TDK
C4
Comp cap (across RC, Ch #2)
15pF, 6.3V, X7R
1206
Vishay
C5
Comp cap (series with R, Ch #2)
680pF, 6.3V, X7R
1206
Vishay
C6
Comp cap (series with R, Ch #1)
680pF, 6.3V, X7R
1206
Vishay
C7
Comp cap (across RC, Ch #1)
15pF, 6.3V, X7R
1206
Vishay
C14
Cff (Ch #2)
680pF, 6.3V, X7R
1206
Vishay
C15
Soft-start cap (Ch #2)
0.1µF, 6.3V/25V, X7R
1206
Vishay
C16
Soft-start cap (Ch #1)
0.1µF, 6.3V/25V, X7R
1206
Vishay
C17
Cff (Ch #1)
680pF, 6.3V, X7R
1206
Vishay
C22
Cout1 (Ch #2) (optional)
330µF,10V, Ta
593 Series
Vishay
C23
Cout2 (Ch #2)
330µF,10V, Ta
593 Series
Vishay
C25
Cout1 (Ch #1)
330µF,10V, Ta
593 Series
Vishay
C26
Cout2 (Ch #1) (optional)
330µF,10V, Ta
593 Series
Vishay
C28
Cboot (Ch #2)
0.1µF, 6.3V, X7R
1206
Vishay
C29
V5 decoupling
0.1µF, 6.3V, X7R
1206
Vishay
C30
Cboot (Ch #1)
0.1µF, 6.3V, X7R
1206
Vishay
C31
VDD decoupling
0.1µF, 6.3V, X7R
1206
Vishay
C32
Cin (Ch #1)
10µF, 25V, X7R
1812
TDK
R1
V5 to VDD series pass
10
Ω, 5%
1812
Vishay
R6
Comp res (series with C, Ch #2)
57.6k, 1%
1206
Vishay
R7
RLIM (Ch #2)
2.94k, 1%
1206
Vishay
R8
RLIM (Ch #1)
2.94k, 1%
1206
Vishay
R9
Comp res (series with C, Ch #1)
57.6k, 1%
1206
Vishay
R14
Rff (Ch #2)
12.7k, 1%
1206
Vishay
R15
Res divider, upper (Ch #2)
43.2k, 1%
1206
Vishay
R16
Res divider, lower (Ch #2)
9.53k, 1%
1206
Vishay
R17
Enable pullup
12.7k, 1%
1206
Vishay
R18
FPWM pullup
12.7k, 1%
1206
Vishay
R19
Freq Adjust
22.1k, 1%
1206
Vishay
R20
PGOOD pullup
12.7k, 1%
1206
Vishay
R21
Res divider, upper (Ch #1)
43.2k, 1%
1206
Vishay
R22
Res divider, lower (Ch #1)
5.9k, 1%
1206
Vishay
R23
Rff (Ch #1)
12.7k, 1%
1206
Vishay
L1
Inductor (Ch #1)
10µH,4.4A
CDRH104R
Sumida
L2
Inductor (Ch #2)
10µH,4.4A
CDRH104R
Sumida
D1
Bootstrap diode (Ch #2)
BAT54LT1
SOT-23
Onsemi
D2
Bootstrap diode (Ch #1)
BAT54LT1
SOT-23
Onsemi
Q1
Upper FET (Ch #1)
Si4828DY (half)
SO-8
Vishay
Q2
Lower FET (Ch #1)
Si4828DY (half)
SO-8
Vishay
Q3
Upper FET (Ch #2)
Si4828DY (half)
SO-8
Vishay
Q4
Lower FET (Ch #2)
Si4828DY (half)
SO-8
Vishay
Q5
Controller
LM2647
TSSOP
National
U1
Dual SPDT switch (see Schematic)
CKN1276-ND
DIP
Grayhill
www.national.com
23



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