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參數(shù)資料
| 型號(hào)： | BD4837FVE |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | ROHS COMPLIANT, VSOF-5 |
| 文件頁(yè)數(shù)： | 8/10頁(yè) |
| 文件大?。?/td> | 258K |
| 代理商： | BD4837FVE |
Technical Note
7/9
BD48
□□G, BD48□□FVE, BD49□□G, BD49□□FVE series
www.rohm.com
2009.04 - Rev.A
2009 ROHM Co., Ltd. All rights reserved.
Examples of the power supply with resistor dividers
In applications where the power supply input terminal (VDD) of an IC with resistor dividers, it is possible that a through
current will momentarily flow into the circuit when the output logic switches, resulting in malfunctions (such as output
oscillatory state).
(Through-current is a current that momentarily flows from the power supply (VDD) to ground (GND) when the output level
switches from “High” to “Low” or vice versa.)
Fig.18
A voltage drop of [the through-current (I1)] × [input resistor (R2)] is caused by the through current, and the input voltage to
descends, when the output switches from “Low” to “High”. When the input voltage decreases and falls below the detection
voltage, the output voltage switches from “High” to “Low”. At this time, the through-current stops flowing through output
“Low”, and the voltage drop is eliminated. As a result, the output switches from “Low” to “High”, which again causes the
through current to flow and the voltage drop. This process is repeated, resulting in oscillation.
VOUT
R2
VDD
BD48□□□
BD49□□□
GND
R1
I1
V1
CIN
CL
IDD
VDD
VDET
0
Through Current
Fig.19 Current Consumption vs. Power Supply Voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BD4837FVE-TR | 功能描述:電壓監(jiān)測(cè)器/監(jiān)控器 CMOS DETEC VOLT 4.0V RoHS:否 制造商:Texas Instruments 監(jiān)測(cè)電壓數(shù):2 監(jiān)測(cè)電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過(guò)電壓閾值: 準(zhǔn)確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風(fēng)格:SMD/SMT |
| BD4837G | 制造商:ROHM 制造商全稱:Rohm 功能描述:Voltage Detector IC |
| BD4837G-TR | 功能描述:電壓監(jiān)測(cè)器/監(jiān)控器 CMOS DETEC VOLT 3.7V RoHS:否 制造商:Texas Instruments 監(jiān)測(cè)電壓數(shù):2 監(jiān)測(cè)電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過(guò)電壓閾值: 準(zhǔn)確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風(fēng)格:SMD/SMT |
| BD4838 | 制造商:ROHM 制造商全稱:Rohm 功能描述:Standard CMOS Voltage Detector IC |
| BD4838FVE | 制造商:ROHM 制造商全稱:Rohm 功能描述:Voltage Detector IC |
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