- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379479 > UCC2975TRPW (Texas Instruments, Inc.) Precision 500 mA regulators PDF資料下載
參數(shù)資料
| 型號： | UCC2975TRPW |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Precision 500 mA regulators |
| 中文描述： | 鎮(zhèn)流器/背光控制器/驅(qū)動器| TSSOP封裝| 8引腳|塑料 |
| 文件頁數(shù)： | 23/28頁 |
| 文件大?。?/td> | 433K |
| 代理商： | UCC2975TRPW |
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頁當前第23頁第24頁第25頁第26頁第27頁第28頁
SLUS499A
–
NOVEMBER 2001
–
REVISED JANUARY 2002
23
www.ti.com
APPLICATION INFORMATION
open lamp shutdown/no-lock operation (continued)
Figure 20 shows the startup performance of the UCC397x family based system with a broken or open lamp.
The open lamp trip level is typically set 20% to 50% higher than the required strike voltage of the lamp, in this
example the open lamp trip level is set at a low 500 V
RMS
. As seen in Figure 21, the lamp does not strike before
the OPEN/SD pin reaches 1.5 V indicating an open lamp, the controller retries seven times before entering an
error shutdown state (see the state diagram in the pin description section).
VCOMP
VOPEN/SD
VPZT
Figure 20. Start-Up With Open Lamp
A second type of failure mode occurs if the system fails to control lamp current. Assuming a proper feedback
network, this failure can occur if the input voltage is too low to operate the lamp or if one of the components in
the power path is open, shorted, or broken. These failures are detected at the COMP pin. Figure 21 shows the
system response where the input voltage is not sufficient for lamp operation. At startup the frequency sweeps
through the range until COMP reaches 2.5 V, the controller attempts seven retries before entering the error
shutdown state. Notice the slope on the COMP pin (trace 2) changes as the system attempts to operate the lamp
in a high gain region but is ultimately unsuccessful.
相關PDF資料 |
PDF描述 |
|---|---|
| UCC2977 | Multi-Topology Piezoelectric Transformer Controller |
| UCC2976TRPW | BALLAST/BACKLIGHT CONTROLLER/DRIVER|TSSOP|8PIN|PLASTIC |
| UCC2977TRPW | Precision 500 mA regulators |
| UCC3976TRPW | Low consumption voltage and current controller for battery chargers and adaptors |
| UCC3977TRPW | BALLAST/BACKLIGHT CONTROLLER/DRIVER|TSSOP|8PIN|PLASTIC |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC2976PW | 功能描述:LCD 驅(qū)動器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| UCC2976PWG4 | 功能描述:LCD 驅(qū)動器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| UCC2976PWR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| UCC2977EVM | 功能描述:電源管理IC開發(fā)工具 UCC2977 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 |
| UCC2977PW | 功能描述:LCD 驅(qū)動器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復。