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參數(shù)資料
| 型號： | TPS40009DGQG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3.05 X 4.98 MM, GREEN, PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 3/28頁 |
| 文件大?。?/td> | 677K |
| 代理商： | TPS40009DGQG4 |
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TPS40007
TPS40009
SLUS589B NOVEMBER 2003 REVISED FEBRUARY 2005
11
www.ti.com
APPLICATION INFORMATION
SETTING THE CURRENT LIMIT
Connecting a resistor from VDD to ILIM sets the current limit. A 15-
A current sink internal to the device causes
a voltage drop at ILIM that becomes the short circuit threshold. Ensure that (VDD0.8 V) ≤ VILIM ≤ VDD. The
tolerance of the current sink is too loose to do an accurate current limit. The main purpose is for hard fault
protection of the power switches. Given the tolerance of the ILIM sink current, and the RDS(on) range for a
MOSFET, it is generally possible to apply a load that thermally damages the converter. This device is intended
for embedded converters where load characteristics are defined and can be controlled.
A local capacitor (with a value 50 pF to 150 pF) placed across the resistor between VDD and ILIM may improve
coupling a common mode noise between VDD and ILIM.
SOFT-START AND SHUTDOWN
These two functions are combined on the SS/SD pin. There is a VBE offset (0.65-V) between the external SS/SD
pin and internal soft-start voltage at the error amplifier input, allowing the device to be enabled before starting
VOUT as shown in Figure 5. This reduces the transient current required to charge the output capacitor at startup,
and allows for a smooth startup with no overshoot of the output voltage.
t Time 1 ms/div
FB
(200 mV/ div)
SS/SD
(200 mV/ div)
Figure 5. Offset Between SS/SD and FB at Startup
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相關(guān)代理商/技術(shù)參數(shù) |
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| TPS40009DGQR | 功能描述:DC/DC 開關(guān)控制器 Low Input Sync Buck src/sink w/prebias 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 |
| TPS40009DGQRG4 | 功能描述:DC/DC 開關(guān)控制器 Low Input Sync Buck src/sink w/prebias 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 |
| TPS40009EVM-001 | 功能描述:電源管理IC開發(fā)工具 TPS40009-001 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)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 |
| TPS40020 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:ENHANCED LOW INPUT VOLTAGE MODE SYNCHRONOUS BUCK CONTROLLER |
| TPS40020PWP | 功能描述:DC/DC 開關(guān)控制器 Enhanced Low Input 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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