參數(shù)資料
型號(hào)： TPS40200MDREPG4
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8
封裝： GREEN, PLASTIC, MS-012AA, SOIC-8
文件頁(yè)數(shù)： 4/43頁(yè)
文件大?。?/td> 1069K
代理商： TPS40200MDREPG4
www.ti.com
2
8
5
+
S Q
Q
R
Latched
Fault
150mV
V
IN
SS
GND
+
Fault
TPS40200
100mV
Reset
Fault
7
ISNS
Enable
EAMP
+ 300mV
EAMP
SSRef
V
S-S
100kW
300
kW
2
F
2
F
1
F
ILIM
OC
R
V
=
I
+
(3)
SW
IN
O
f
V
C
f2
f1
R
f2
f1
R
+
÷
(4)
SGLS371 – JANUARY 2007
GENERAL INFORMATION (continued)
Figure 26. Current-Limit Reset
If necessary, a small R-C filter can be added to the current-sensing network to reduce nuisance tripping due to
noise pickup. This filter also can be used to trim the overcurrent trip point to a higher level with the addition of a
single resistor. See Figure 27. The nominal overcurrent trip point using the circuit of Figure 27 is described as:
Where:
I
OC = Overcurrent trip point, peak current in the inductor
V
ILIM = Overcurrent threshold voltage for the TPS40200, typically 100 mV
R
ILIM = Value of the current sense resistor (in )
R
F1 and RF2 = Values of the scaling resistors (in )
The value of the capacitor is determined by the nominal pulse width of the converter and the values of the
scaling resistors RF1 and RF2. It is best not to have the time constant of the filter longer than the nominal pulse
width of the converter, otherwise a substantial increase in the overcurrent trip point occurs. Using this constraint,
the capacitor value may be bounded by: .
Where:
Cf = Value of the current-limit filter capacitor (in F)
VO = Output voltage of the converter
VIN = Input voltage to the converter
fSW = Converter switching frequency
Rf1 and Rf2 = Values of the scaling resistors (in )
12
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS40200-Q1 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER
TPS40200QDRQ1 功能描述:DC/DC 開(kāi)關(guān)控制器 Wide-Inp-Rng Nonsync Vltg-Mode Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40200SHKJ 功能描述:DC/DC 開(kāi)關(guān)控制器 Wide Inp Non-Sync Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40200SHKQ 功能描述:DC/DC 開(kāi)關(guān)控制器 Hi Temp Non-Sync Buck DC/DC Cntlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40200SKGD1 功能描述:DC/DC 開(kāi)關(guān)控制器 Wide Input Non-Synch RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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