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參數資料
型號: RR0816P-224-D
廠商: Electronic Theatre Controls, Inc.
英文描述: 2-ch DC/DC Converter IC
中文描述: 2通道直流/直流轉換器集成電路
文件頁數: 24/36頁
文件大小: 380K
代理商: RR0816P-224-D
MB39A104
24
I
SELECTION OF COMPONENTS
Pch MOS FET
The P-ch MOSFET for switching use should be rated for at least 20% more than the maximum input voltage. To
minimize continuity loss, use a FET with low R
DS(ON)
between the drain and source. For high input voltage and
high frequency operation, on/off-cycle switching loss will be higher so that power dissipation must be considered.
In this application, the Toshiba TPC8102 is used. Continuity loss, on/off switching loss, and total loss are deter-
mined by the following formulas. The selection must ensure that peak drain current does not exceed rated values,
and also must be in accordance with overcurrent detection levels.
Continuity loss : P
C
P
C
=
I
D 2
×
R
DS (ON)
×
Duty
On-cycle switching loss : P
S (ON)
V
D (Max)
×
I
D
×
tr
×
f
OSC
Off-cycle switching loss : P
S (OFF)
V
D (Max)
×
I
D (Max)
×
tf
×
f
OSC
Total loss : P
T
P
T
=
P
C
+
P
S (ON)
+
P
S (OFF)
Example: Using the Toshiba TPC8102
CH1
Input voltage V
IN (Max)
=
19 V, output voltage V
O
=
5 V, drain current I
D
=
3 A, Oscillation frequency f
OSC
=
500 kHz,
L
=
15
μ
H, drain-source on resistance R
DS (ON)
: 50 m
, tr
=
tf : 100 ns.
Drain current (Max) : I
D (Max)
Drain current (Min) : I
D (Min)
P
S (ON)
=
6
P
S (OFF)
=
6
I
D (Max)
=
I
O
+
V
IN
V
O
2L
19
5
2
×
15
×
10
6
ton
=
3
+
×
1
×
0.263
500
×
10
3
: 3.25 (A)
I
D (Min)
=
I
O
V
IN
V
O
2L
19
5
2
×
15
×
10
6
ton
=
3
×
1
×
0.263
500
×
10
3
: 2.75 (A)
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RS-422 RS-422 AND RS-485 APPLICATION NOTE
相關代理商/技術參數
參數描述
RR0816P-224-D-C 制造商:Susumu 功能描述:Resistor,Thin Film,SMD,1608,220K
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