- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98282 > TPS54160DGQ (TEXAS INSTRUMENTS INC) 2.7 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 PDF資料下載
參數(shù)資料
| 型號： | TPS54160DGQ |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)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(shù)： | 21/50頁 |
| 文件大?。?/td> | 1375K |
| 代理商： | TPS54160DGQ |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當(dāng)前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁
+
2.2
F
m
2.2
F
m
0.1
F
m
332kW
61.9kW
0.01
F
m
90.9kW
C2
C3
C4
R3
R4
CSS
RT
U1
TPS54160DGQ
C1
0.1
F
m
L1
10
H
m
D1
B220A
C
OUT
47
F/6.3V
m
CF
6.8pF
RC
76.8kW
CC
2700pF
R1
31.6kW
R2
10kW
VIN
BOOT
EN
SS/TR
RT/CLK
PwPd PWRGD
VSNS
COMP
GND
PH
8-18V
3.3Vat1.5 A
SLVS795C – OCTOBER 2008 – REVISED OCTOBER 2010
www.ti.com
APPLICATION INFORMATION
Design Guide — Step-By-Step Design Procedure
This example details the design of a high frequency switching regulator design using ceramic output capacitors.
A few parameters must be known in order to start the design process. These parameters are typically determined
at the system level. For this example, we will start with the following known parameters:
Output Voltage
3.3 V
Transient Response 0 to 1.5A load step
ΔVOUT= 4%
Maximum Output Current
1.5 A
Input Voltage
12 V nom. 8 V to 18 V
Output Voltage Ripple
< 33 mVpp
Start Input Voltage (rising VIN)
7.25 V
Stop Input Voltage (falling VIN)
6.25 V
Selecting the Switching Frequency
The first step is to decide on a switching frequency for the regulator. Typically, the user will want to choose the
highest switching frequency possible since this will produce the smallest solution size. The high switching
frequency allows for lower valued inductors and smaller output capacitors compared to a power supply that
switches at a lower frequency. The switching frequency that can be selected is limited by the minimum on-time of
the internal power switch, the input voltage and the output voltage and the frequency shift limitation.
Equation 12 and Equation 13 must be used to find the maximum switching frequency for the regulator, choose
the lower value of the two equations. Switching frequencies higher than these values will result in pulse skipping
or the lack of overcurrent protection during a short circuit.
The typical minimum on time, tonmin, is 130 ns for the TPS54160. For this example, the output voltage is 3.3 V
and the maximum input voltage is 18 V, which allows for a maximum switch frequency up to 1600 kHz when
including the inductor resistance, on resistance and diode voltage in Equation 12. To ensure overcurrent
runaway is not a concern during short circuits in your design use Equation 13 or the solid curve in Figure 42 to
determine the maximum switching frequency. With a maximum input voltage of 20 V, for some margin above 18
V, assuming a diode voltage of 0.5 V, inductor resistance of 100 m
, switch resistance of 200m, a current limit
value of 2.7 A, the maximum switching frequency is approximately 2500kHz.
Choosing the lower of the two values and adding some margin a switching frequency of 1200 kHz is used. To
determine the timing resistance for a given switching frequency, use Equation 11 or the curve in Figure 40.
Figure 51. High Frequency, 3.3V Output Power Supply Design with Adjusted UVLO.
28
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54160
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS54160DGQR | 2.7 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS5420MDREPG4 | 5.2 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS5420MDREP | 5.2 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS54225PWP | 4.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14 |
| TPS54225PWPR | 4.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54160DGQG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)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(guān)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(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54160DGQR | 功能描述:直流/直流開關(guān)調(diào)節(jié)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(guān)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(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54160DGQRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)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(guān)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(shù)量: 最大工作溫度: 安裝風(fēng)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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。