參數(shù)資料
型號(hào)： TPS40200HD
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8
封裝： PLASTIC, SOIC-8
文件頁(yè)數(shù)： 7/45頁(yè)
文件大?。?/td> 917K
代理商： TPS40200HD
2
8
5
+
S Q
Q
R
Latched
Fault
150 mV
VDD
SS
GND
+
Fault
TPS40200
100 mV
Reset
Fault
7
ISNS
Enable
EAMP
+ 300 mV
EAMP
SS Ref
V
S-S
100 kW
300
kW
www.ti.com
SGLS400B – OCTOBER 2009 – REVISED MAY 2010
Current-Limit Resistor Selection
As shown in Figure 28, a resistor in series with the power MOSFET sets the overcurrent protection level. Use a
low-inductance resistor to avoid problems with ringing signals and nuisance tripping. When the FET is on and the
controller senses 100 mV or more drop from the VDD pin to theISNS pin, an overcurrent condition is declared.
When this happens, the FET is turned off and, as shown in Figure 29, the soft-start capacitor is discharged.
When the soft-start capacitor reaches a level below 150 mV, the converter clears the overcurrent condition flag
and attempts to restart. If the condition that caused the overcurrent event to occur is still present on the output of
the converter (see Figure 28), another overcurrent condition is declared and the process repeats indefinitely.
Figure 28 shows the soft-start capacitor voltage during an extended output fault condition. The overall duty cycle
of current conduction during a persistent fault is approximately 2%.
Figure 26. Typical Soft-Start Capacitor and VOUT During Overcurrent
Figure 27. Current-Limit Reset
Copyright 2009–2010, Texas Instruments Incorporated
15
Product Folder Link(s): TPS40200-HT
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS40200-HT 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER
TPS40200MDREP 功能描述:DC/DC 開關(guān)控制器 Mil Enhanced Nonsync Vltg-Mode Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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
TPS40200MDREPG4 功能描述:電壓模式 PWM 控制器 EP DC/DC CONTROLLER RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
TPS40200-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER
TPS40200QDRQ1 功能描述:DC/DC 開關(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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