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參數資料
| 型號： | TPS54160DGQR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 2.7 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | GREEN, PLASTIC, MSOP-10 |
| 文件頁數： | 14/50頁 |
| 文件大小： | 1375K |
| 代理商： | TPS54160DGQR |
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)
( )
+
÷
=
÷
-
+
è
L
dc
OUT
d
SW max skip
ON
IN
L
d
DS on
I
R
V
1
f
t
V
I
R
V
( )
+
÷
=
÷
-
+
è
L
dc
d
OUT sc
DIV
SWshift
ON
IN
L
d
DS on
I
R
V
f
t
V
I
R
V
Skip
Shift
10
20
30
40
50
60
2500
2000
1500
1000
500
0
f
-SwitchingFrequency-kHz
s
V -InputVoltage-V
I
V
=3.3V
O
www.ti.com
SLVS795C – OCTOBER 2008 – REVISED OCTOBER 2010
DETAILED DESCRIPTION (continued)
Selecting the Switching Frequency
The switching frequency that is selected should be the lower value of the two equations, Equation 12 and
Equation 13. Equation 12 is the maximum switching frequency limitation set by the minimum controllable on time.
Setting the switching frequency above this value causes the regulator to skip switching pulses.
Equation 13 is the maximum switching frequency limit set by the frequency shift protection. To have adequate
output short circuit protection at high input voltages, the switching frequency should be set to be less than the
fSW(maxshift) frequency. In Equation 13, to calculate the maximum switching frequency, consider that the output
voltage decreases from the nominal voltage to 0 V, the fDIV integer increases from 1 to 8 corresponding to the
frequency shift.
In Figure 42, the solid line illustrates a typical safe operating area regarding frequency shift and assumes the
output voltage is 0 V, and the resistance of the inductor is 0.1
, FET on-resistance of 0.2 and the diode
voltage drop is 0.5 V. The dashed line is the maximum switching frequency to avoid pulse skipping. Enter these
equations in a spreadsheet or other software or use the SwitcherPro design software to determine the switching
frequency.
(12)
(13)
IL
inductor current
Rdc
inductor resistance
VIN
maximum input voltage
VOUT
output voltage
VOUT(sc)
output voltage during short
Vd
diode voltage drop
RDS(on)
switch on resistance
tON
controllable on time
fDIV
frequency divide equals (1, 2, 4, or 8)
Figure 42. Maximum Switching Frequency vs. Input Voltage
Copyright 2008–2010, Texas Instruments Incorporated
21
Product Folder Link(s): TPS54160
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| TPS54160DGQRG4 | 功能描述:直流/直流開關調節器 3.5-60V,1.5A Step Down SWIFT Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54160DRCR | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.5-A, 60-V, STEP-DOWN SWIFT DC/DC CONVERTER WITH ECO-MODE |
| TPS54160DRCT | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.5-A, 60-V, STEP-DOWN SWIFT DC/DC CONVERTER WITH ECO-MODE |
| TPS54160EVM-230 | 功能描述:電源管理IC開發工具 TPS54160 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS54160EVM-535 | 功能描述:電源管理IC開發工具 Eval Mod for High Brightness LED Drvr RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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