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參數(shù)資料
| 型號： | L6911D |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 5 BIT PROGRAMMABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION |
| 中文描述： | 5位可編程降壓控制器采用同步整流 |
| 文件頁數(shù)： | 8/17頁 |
| 文件大?。?/td> | 233K |
| 代理商： | L6911D |
L6911D
8/17
Figure 3. High Side driver peak current. Vboot-Vphase=12V (left) Vboot-Vphase=5V (right)
Figure 4. Low Side driver peak current. Vcc=12V (left) Vcc=5V (right)
Monitoring and Protections
The output voltage is monitored by means of pin 1 (VSEN). If it is not within ±12% (typ.) of the programmed
value, the powergood output is forced low.
The device provides overvoltage protection, when the output voltage reaches a value 17% (typ.) grater than the
nominal one. If the output voltage exceeds this threshold, the OVP pin is forced high, triggering an external SCR
to shuts the supply (VIN) down, and also the lower driver is turned on as long as the over-voltage is detected.
To perform the overcurrent protection the device compares the drop across the high side MOS, due to the
RDSON, with the voltage across the external resistor (ROCS) connected between the OCSET pin and drain of
the upper MOS. Thus the overcurrent threshold (I
P
) can be calculated with the following relationship:
Where the typical value of I
OCS
is 200
μ
A. To calculate the ROCS value it must be considered the maximum
R
DSON
(also the variation with temperature) and the minimum value of I
OCS
. To avoid undesirable trigger of
CH1 = High Side Gate
CH4 = Gate Current
CH1 = Low Side Gate
CH4 = Gate Current
I
P
I
R
R
DSON
--------------------------------
=
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| L6918A | 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER |
| L6918AD | 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6911DTR | 功能描述:DC/DC 開關(guān)控制器 5-Bit Prog Step-Down 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 安裝風格: 封裝 / 箱體:CPAK |
| L6911E | 功能描述:DC/DC 開關(guān)控制器 5-Bit Prog Step-Down 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 安裝風格: 封裝 / 箱體:CPAK |
| L6911E_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5-Bit programmable step down controller with synchronous rectification |
| L6911ETR | 功能描述:DC/DC 開關(guān)控制器 5B PROGRAMMABLE STEP DOWN CONTROLLER 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 安裝風格: 封裝 / 箱體:CPAK |
| L6912-2 | 制造商:Thomas & Betts 功能描述:1/2 CORD GRIP CONNECTOR,2/BG |
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