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參數(shù)資料
| 型號： | TPS3813I50DBVTG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO6 |
| 封裝： | GREEN, PLASTIC, SOT-23, 6 PIN |
| 文件頁數(shù)： | 2/18頁 |
| 文件大?。?/td> | 536K |
| 代理商： | TPS3813I50DBVTG4 |
WDI
WDR
WDT
GND
TPS3813
I/O
GND
Position 1
Position 2
Position 3
Position 5
Position 4
R1
R2
(1)
mC
C
(ext)
V
DD
V
DD
V
DD
0.1 F
m
0.1 F
m
V
DD
V
DD
RESET
SLVS331E – DECEMBER 2000 – REVISED OCTOBER 2010
www.ti.com
APPLICATION EXAMPLE
A typical application example (see Figure 7) is used to describe the function of the watchdog in more detail.
To configure the window watchdog function, two pins are provided by the TPS3813. These pins set the window
timeout and ratio.
The window watchdog ratio is a fixed ratio, which determines the lower boundary of the window frame. It can be
configured in two different frame sizes.
If the window watchdog ratio pin (WDR) is set to VDD, Position 1 in Figure 7, then the lower window frame is a
value based on a ratio calculation of the overall window timeout size: For the watchdog timeout pin (WDT)
connected to GND, it is a ratio of 1:124.9, for WDT connected to VDD, it is a ratio of 1:127.7, and for an external
capacitor connected to WDT, it is a ratio of 1:64.5.
If the window watchdog ratio pin (WDR) is set to GND, Position 2, the lower window frame will be a value based
on a ratio calculation of the overall window timeout size: For the watchdog timeout pin (WDT) connected to GND,
it will be a ratio of 1:31.8, for WDT connected to VDD it will be 1:32, and for an external capacitor connected to
WDT it will be 1:25.8.
The watchdog timeout can be set in two fixed timings of 0.25 seconds and 2.5 seconds for the window or can by
programmed by connecting a external capacitor with a low leakage current at WDT.
Example: If the watchdog timeout pin (WDT) is connected to VDD, the timeout will be 2.5 seconds. If the window
watchdog ratio pin (WDR) is set in this configuration to a ratio of 1:127.7 by connecting the pin to VDD, the lower
boundary is 19.6 ms.
(1)
Use this pull-down resistor if a GPIO pin is used to drive the WDI input pin of the TPS3813 to keep the WDI pin from
floating during power-up.
Figure 7. Application Example
10
Copyright 2000–2010, Texas Instruments Incorporated
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| TPS3813I50QDBVRQ1 | 功能描述:監(jiān)控電路 Proc Sup Circuit W/ Window Watchdog 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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3813I50QDBVRSV | 制造商:Texas Instruments 功能描述: |
| TPS3813J25DBVR | 功能描述:監(jiān)控電路 w/Prog Watchdog Window 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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3813J25DBVRG4 | 功能描述:監(jiān)控電路 w/Prog Watchdog Window 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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3813J25DBVT | 功能描述:監(jiān)控電路 w/Prog Watchdog Window 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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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