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參數資料
| 型號： | TPS3806J20DBVRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | GREEN, PLASTIC, SOT-23, 6 PIN |
| 文件頁數： | 9/13頁 |
| 文件大小： | 513K |
| 代理商： | TPS3806J20DBVRG4 |
www.ti.com
_
+
_
+
R1
R2
Reference
Voltage of
1.207 V
RSTSENSE
RESET
LSENSE
HSENSE
VDD
GND
TPS3806
Detailed Description
Operation
Programming the Threshold Voltage Levels
V
(LSENSE) +
V
ref
R1 ) R2 ) R3
R2 ) R3
(1)
V
(HSENSE) +
V
ref
R1 ) R2 ) R3
R3
(2)
TPS3806J20
TPS3806I33
SLVS393A – JULY 2001 – REVISED NOVEMBER 2004
FUNCTIONAL BLOCK DIAGRAM
The TPS3806 is used for monitoring battery voltage and asserting RESET when a battery gets discharged below
a certain threshold voltage. The battery voltage is monitored by a comparator via an external resistor divider.
When the voltage at the LSENSE input drops below the internal reference voltage the RSTSENSE output pulls
low. The output remains low until the battery is replaced, or recharged above a second higher trip-point, set at
HSENSE. A second voltage can be monitored at VDD. The independent RESET output pulls low when the
voltage at VDD drops below the fixed threshold voltage. Because the TPS3806 outputs are open-drain MOSFETs,
most applications may require a pull-up resistor.
The low-voltage threshold at LSENSE is calculated according to Equation 1:
where Vref = 1.207 V
The high-voltage threshold at HSENSE is calculated as shown in Equation 2:
where Vref = 1.207 V
To minimize battery current draw it is recommended to use 1-M
as the total resistor value R
(tot), with
R(tot) = R1 + R2 + R3.
5
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相關代理商/技術參數 |
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| TPS3806J20DBVT | 功能描述:電壓監測器/監控器 Dl Volt Detector RoHS:否 制造商:Texas Instruments 監測電壓數:2 監測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準確性: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 安裝風格:SMD/SMT |
| TPS3806J20DBVTG4 | 功能描述:電壓監測器/監控器 Dl Volt Detector RoHS:否 制造商:Texas Instruments 監測電壓數:2 監測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準確性: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 安裝風格:SMD/SMT |
| TPS3807A30DCKR | 功能描述:監控電路 Dual-Channel Super Circuit RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 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 |
| TPS3807A30DCKRG4 | 功能描述:監控電路 Dual-Channel Super Circuit RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 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 |
| TPS3807A30DCKT | 功能描述:監控電路 Dual-Channel Super Circuit RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 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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