Datasheet > BD4860_09

BD4860_09

更新时间： 2022-10-15 11:30:04

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描述
Standard CMOS Voltage Detector IC

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BD4860_09 数据手册

Technical Note

BD48□□G, BD48□□FVE, BD49□□G, BD49□□FVE series

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.)

BD48□□□

BD49□□□

OUT

CIN

GND

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.

IDD

Through Current

VDD

VDET

Fig.19 Current Consumption vs. Power Supply Voltage

www.rohm.com

2009.04 - Rev.A

7/9

1...4 5 678 9 10

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型号	品牌	描述	获取价格	数据表
BD4860FVE	ROHM	Voltage Detector IC	获取价格
BD4860FVE-TL	ROHM	Standard CMOS Voltage Detector IC	获取价格
BD4860FVE-TR	ROHM	Power Supply Support Circuit, Fixed, 1 Channel, +6VV, CMOS, PDSO5, ROHS COMPLIANT, VSOF-5	获取价格
BD4860G	ROHM	Voltage Detector IC	获取价格
BD4860G-TL	ROHM	Standard CMOS Voltage Detector IC	获取价格
BD4860G-TR	ROHM	Standard CMOS Voltage Detector IC	获取价格