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參數資料
| 型號： | TPS54160DRCT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | PLASTIC, SON-10 |
| 文件頁數： | 32/50頁 |
| 文件大?。?/td> | 1375K |
| 代理商： | TPS54160DRCT |
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( )
=
÷
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2
OUT
COND
OUT
DS on
IN
V
P
I
R
V
(
)
-
=
2
9
SW
IN
SW
OUT
P
V
f
I
0.25
10
-
=
9
GD
IN
SW
P
V
3
10
f
-
=
6
Q
IN
P
116
10
V
=
TOT
COND
SW
GD
Q
P
=
+
J
A
TH
TOT
T
R
P
(
)
(
)
=
-
TH
TOT
A max
J max
T
R
P
SLVS795C – OCTOBER 2008 – REVISED OCTOBER 2010
www.ti.com
Power Dissipation Estimate
The following formulas show how to estimate the device power dissipation under continuous conduction mode
(CCM) operation. These equations should not be used if the device is working in discontinuous conduction mode
(DCM).
The power dissipation of the device includes conduction loss (Pcon), switching loss (Psw), gate drive loss (Pgd)
and supply current (Pq).
(54)
(55)
(56)
where
IOUT is the output current (A)
RDS(on) is the on-resistance of the high-side MOSFET ()
VOUT is the output voltage (V)
VIN is the input voltage (V)
fSW is the switching frequency (Hz)
(57)
(58)
For given TA,
(59)
For given TJMAX = 150°C
where
PTOT s the total device power dissipation (W)
TA is the ambient temperature (°C)
TJ is the junction temperature (°C)
RTH is the thermal resistance of the package (°C/W)
TJ(max) is maximum junction temperature (°C)
TA(max) is maximum ambient temperature (°C).
(60)
There are additional power losses in the regulator circuit due to the inductor ac and dc losses, the catch diode
and trace resistance that will impact the overall efficiency of the regulator.
38
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54160
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