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参数资料
| 型号： | BD4837FVE |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封装： | ROHS COMPLIANT, VSOF-5 |
| 文件页数： | 7/10页 |
| 文件大小： | 258K |
| 代理商： | BD4837FVE |
Technical Note
6/9
BD48
□□G, BD48□□FVE, BD49□□G, BD49□□FVE series
www.rohm.com
2009.04 - Rev.A
2009 ROHM Co., Ltd. All rights reserved.
Circuit Applications
1) Examples of a common power supply detection reset circuit.
Application examples of BD48
□□G/FVE series (Open
Drain output type) and BD49
□□G/FVE series (CMOS
output type) are shown below.
CASE1: the power supply of the microcontroller (VDD2)
differs from the power supply of the reset detection
(VDD1).
Use the open drain output type (BD48
□□G/FVE) attached
a load resistance (RL) between the output and VDD2. (As
shown Fig.15)
CASE2: the power supply of the microcontroller (VDD1) is
same as the power supply of the reset detection (VDD1).
Use CMOS output type (BD49
□□G/FVE) or open drain
output type (BD48
□□G/FVE) attached a load resistance
(RL) between the output and Vdd1. (As shown Fig.16)
When a capacitance CL for noise filtering is connected to
the VOUT pin (the reset signal input terminal of the
microcontroller), please take into account the waveform of
the rise and fall of the output voltage (VOUT).
2) The following is an example of a circuit application in which an OR connection between two types of detection voltages
resets the microcontroller.
When there are many power supplies of the system, power supplies VDD1 and VDD2 are being monitored separately, and
it is necessary to reset the microcomputer, it is possible to use an OR connection on the open drain output type
BD48
□□G/FVE series to pull-up to the desired voltage (VDD3) as shown in Fig.17 and make the output “High” voltage
matches the power supply voltage VDD3 of the microcontroller.
VDD2
VDD1
VDD3
GND
Microcontroller
RL
BD48□□□
RST
VDD1
BD48□□□
VDD2
GND
Microcontroller
CL
（Noise-filtering
Capacitor）
RL
Fig.15 Open Collector Output Type
CL
(Noise-filtering
Capacitor）
VDD1
BD49□□□
Microcontroller
GND
Fig.16 CMOS Output Type
Fig.17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BD4837FVE-TR | 功能描述:电压监测器/监控器 CMOS DETEC VOLT 4.0V RoHS:否 制造商:Texas Instruments 监测电压数:2 监测电压:Adjustable 输出类型:Open Drain 欠电压阈值: 过电压阈值: 准确性:1 % 工作电源电压:1.5 V to 6.5 V 工作电源电流:1.8 uA 最大工作温度:+ 125 C 封装 / 箱体:SON-6 安装风格:SMD/SMT |
| BD4837G | 制造商:ROHM 制造商全称:Rohm 功能描述:Voltage Detector IC |
| BD4837G-TR | 功能描述:电压监测器/监控器 CMOS DETEC VOLT 3.7V RoHS:否 制造商:Texas Instruments 监测电压数:2 监测电压:Adjustable 输出类型:Open Drain 欠电压阈值: 过电压阈值: 准确性:1 % 工作电源电压:1.5 V to 6.5 V 工作电源电流:1.8 uA 最大工作温度:+ 125 C 封装 / 箱体:SON-6 安装风格:SMD/SMT |
| BD4838 | 制造商:ROHM 制造商全称:Rohm 功能描述:Standard CMOS Voltage Detector IC |
| BD4838FVE | 制造商:ROHM 制造商全称:Rohm 功能描述:Voltage Detector IC |
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