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參數(shù)資料
| 型號： | TL7709 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Supply voltage Supervisor |
| 中文描述： | 電源電壓監(jiān)控 |
| 文件頁數(shù)： | 15/17頁 |
| 文件大小： | 340K |
| 代理商： | TL7709 |
Design
Tips
Supply voltage Supervisor TL77xx Series
11
Figure 13. Buffered Circuit for the Reference Voltage
4. Design Tips
The application of the supply voltage supervisors of the series TL77xx is not complicated. However it
should be noticed, that this circuit is an analog circuit, whose function and performance - e.g. the stability
of the reference voltage - may be negatively influenced by noise in the neighboring circuits. Therefore the
voltage monitor should be placed on the printed circuit board, where there are no neighboring circuits in
the which switch high currents (like bus interface circuits and power switches). When laying out the layout
of the printed circuit board special care should taken with the interconnects which carry analog signals.
Beside the SENSE input these are the C
t
and V
ref
terminals. Noise coupled into the C
t
input will lead to a
reduction of the output pulse width. Noise coupled into the V
ref
input or into the filter capacitor at this input
may lead to undesired triggering of the circuit and by this to an undesired RESET pulse. Practice shows,
that this malfunction when high currents flow over the interconnects of these capacitors to the GND
terminal of the voltage monitor. To avoid these effects, the GND terminals of these capacitors must be
connected by the shortest way to the GND terminal of the voltage monitor in so that no currents caused by
other circuits flow over these wires. Figure 14 show a layout proposal for the printed circuit board.
Furthermore the resistors of the voltage divider at the SENSE input of the TL7702 (R
2
and R
3
in figure 14)
have to be placed in so, that no noise may be coupled into this circuit.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TL7709A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SUPPLY-VOLTAGE SUPERVISORS |
| TL7709ACD | 功能描述:監(jiān)控電路 7.6V Monitor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TL7709ACD | 制造商:Texas Instruments 功能描述:SUPERVISORY SINGLE PROG SOIC8 制造商:Texas Instruments 功能描述:SUPERVISORY, SINGLE, PROG, SOIC8 制造商:Texas Instruments 功能描述:SUPERVISORY, SINGLE, PROG, SOIC8; Threshold Voltage:7.6V; No. of Supervisors / Monitors:1; Supply Voltage Min:3.5V; Supply Voltage Max:18V; Reset Type:Active-High, Active-Low; Digital IC Case Style:SOIC; No. of Pins:8; Supply ;RoHS Compliant: Yes |
| TL7709ACDE4 | 功能描述:監(jiān)控電路 Sngl SVS For 9v Sys w/Prg Time Delay RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TL7709ACDG4 | 功能描述:監(jiān)控電路 Single SVS For 9v Systems RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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