- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69509 > TPS40210QDGQRQ1 (TEXAS INSTRUMENTS INC) SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 PDF資料下載
參數(shù)資料
| 型號： | TPS40210QDGQRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | GREEN, PLATSIC, MSOP-10 |
| 文件頁數(shù)： | 10/41頁 |
| 文件大?。?/td> | 999K |
| 代理商： | TPS40210QDGQRQ1 |
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頁當(dāng)前第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
(
)
SS
BP
SS(ofst)
SS
BP
SS(ofst)
FB
t
C
V
R
ln
V
=
-
÷
÷
-
+
è
I
=
C(chg)
C
V
t
OUT
SS
t
>
SS
C
V
(I
I
)
OUT
OUT(oc)
EXT
-
SLVS861D – AUGUST 2008 – REVISED APRIL 2010
www.ti.com
The required capacitance for a given soft start time t3 – t1 in Figure 24 is calculated in Equation 13.
where
tSS is the soft-start time
RSS(chg) is the SS charging resistance in , typically 500 k
CSS is the value of the capacitor on the SS pin, in F
VBP is the value of the voltage on the BP pin in V
VSS(ofst) is the approximate level shift from the SS pin to the error amplifier (~1 V)
VFB is the error amplifier reference voltage, 700 mV typical
(13)
Note that tSS is the time it takes for the output voltage to rise from 0 V to the final output voltage. Also note the
tolerance on RSS(chg) given in the electrical specifications table. This contributes to some variability in the output
voltage rise time, and margin must be applied to account for it in design.
Also take note of VBP. Its value varies depending on input conditions. For example, a converter operating from a
slowly rising input initializes VBP at a fairly low value and increases during the entire startup sequence. If the
controller has a voltage above 8 V at the input and the DIS pin is used to stop and then restart the converter, VBP
is approximately 8 V for the entire startup sequence. The higher the voltage on BP, the shorter the startup time is
and conversely, the lower the voltage on BP, the longer the startup time is.
The soft-start time (tSS) must be chosen long enough so that the converter can start up without going into an
overcurrent state. Since the overcurrent state is triggered by sensing the peak voltage on the ISNS pin, that
voltage must be kept below the overcurrent threshold voltage VISNS(oc). The voltage on the ISNS pin is a function
of the load current of the converter, the rate of rise of the output voltage and the output capacitance, and the
current sensing resistor. The total output current that must be supported by the converter is the sum of the
charging current required by the output capacitor and any external load that must be supplied during startup. This
current must be less than the IOUT(oc) value used in Equation 6 or Equation 7 (depending on the operating mode
of the converter) to determine the current sense resistor value.
In these equations, the actual input voltage at the time that the controller reaches the final output voltage is the
important input voltage to use in the calculations. If the input voltage is slowly rising and is at less than the
nominal input voltage when the startup time ends, the output current limit is less than IOUT(oc) at the nominal input
voltage. The output capacitor charging current must be reduced (decrease COUT or increase the tSS) or IOUT(oc)
must be increased and a new value for RISNS calculated.
(14)
where
IC(chg) is the output capacitor charging current in A
COUT is the total output capacitance in F
VOUT is the output voltage in V
IOUT(oc) is the desired over current trip point in A
IEXT is any external load current in A
(15)
18
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS40210-Q1 TPS40211-Q1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS40304DRCT | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS40303DRCT | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS40304DRCR | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS40422RHAT | DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, QCC40 |
| TPS40422RHAR | DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, QCC40 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS40210SHKK | 功能描述:電流型 PWM 控制器 Wide Inp Range Crnt Mode Boost Contrlr RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| TPS40210SKGD1 | 功能描述:電流型 PWM 控制器 Wide Inp Range Crnt Mode Boost Contrlr RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| TPS40211 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5-V TO 52-V INPUT CURRENT MODE BOOST CONTROLLER |
| TPS40211DGQ | 功能描述:LED照明驅(qū)動器 Wide Input Rnge Crnt Mode Boost Cntrlr RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS40211DGQ | 制造商:Texas Instruments 功能描述:DC/DC Controllers (External Switch) IC 制造商:Texas Instruments 功能描述:IC, BOOST CONTROLLER, MSOP-10 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。