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參數資料
| 型號： | TPS3106K33DBV |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | UltraLow Supply-Current/Supply-Voltage Supervisory Circuits |
| 中文描述： | 超低Supply-Current/Supply-Voltage監(jiān)控電路 |
| 文件頁數： | 13/20頁 |
| 文件大小： | 336K |
| 代理商： | TPS3106K33DBV |
www.ti.com
APPLICATION INFORMATION
R1
R2
V
TRIP
V
IT(S)
1
(1)
TPS3106E09DBV
SENSE
GND
R1
R2
V
DD
RSTVDD
RSTSENSE
R3
2 Cell
NiMH
Reset Output
MR
TPS3103xxx
TPS3106xxx
TPS3110xxx
SLVS363D–AUGUST 2001–REVISED NOVEMBER 2006
The TPS31xx family has a quiescent current in the 1-
μ
A to 2-
μ
A range. When RESET is active, triggered by the
voltage monitored at V
DD
, the quiescent current increases to about 20
μ
A (see the
Electrical Characteristics
).
In some applications it is necessary to minimize the quiescent current even during the reset period. This is
especially true when the voltage of a battery is supervised and the RESET is used to shut down the system or
for an early warning. In this case the reset condition will last for a longer period of time. The current drawn from
the battery should almost be zero, especially when the battery is discharged.
For this kind of application, either the TPS3103 or TPS3106 is a good fit. To minimize current consumption,
select a version where the threshold voltage is lower than the voltage monitored at V
DD
. The TPS3106 has two
reset outputs. One output (RSTVDD) is triggered from the voltage monitored at V
DD
. The other output
(RSTSENSE) is triggered from the voltage monitored at SENSE. In the application shown in
Figure 8
, the
TPS3106E09 is used to monitor the input voltage of two NiCd or NiMH cells. The threshold voltage (V
(TH)
= 0.86
V) was chosen as low as possible to ensure that the supply voltage is always higher than the threshold voltage
at V
. The voltage of the battery is monitored using the SENSE input. The voltage divider was calculated to
assert a reset using the RSTSENSE output at 2
×
0.8 V = 1.6 V.
where:
V
TRIP
is the voltage of the battery at which a reset is asserted and
V
IT(S)
is the threshold voltage at SENSE = 0.551 V.
R1 was chosen for a resistor current in the 1-
μ
A range.
With V
TRIP
= 1.6 V:
R1
≈
1.9
×
R2
R1 = 820 k
, R2 = 430 k
Figure 8. Battery Monitoring with 3-
μ
A Supply Current for Device and Resistor Divider
13
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS3106K33DBVR | 功能描述:監(jiān)控電路 Current/Supply-Volt Supervisory RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)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 |
| TPS3106K33DBVRG4 | 功能描述:監(jiān)控電路 Current/Supply-Volt Supervisory RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)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 |
| TPS3106K33DBVT | 功能描述:監(jiān)控電路 Current/Supply-Volt Supervisory RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)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 |
| TPS3106K33DBVTG4 | 功能描述:監(jiān)控電路 Current/Supply-Volt Supervisory RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)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 |
| TPS3106K33DVB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:ULTRALOW SUPPLY CURRENT/SUPPLY VOLTAGE SUPERVISORY CIRCUITS |
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