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参数资料
| 型号： | TPS3103H20DBVRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封装： | GREEN, PLASTIC, SOT-23, 6 PIN |
| 文件页数： | 5/24页 |
| 文件大小： | 590K |
| 代理商： | TPS3103H20DBVRG4 |
www.ti.com
APPLICATION INFORMATION
R1 + R2
V
TRIP
V
IT(S)
* 1
(1)
TPS3106E09DBV
SENSE
GND
R1
R2
V
DD
RSTVDD
RSTSENSE
R3
2Cell
NiMH
ResetOutput
MR
TPS3103xxx
TPS3106xxx
TPS3110xxx
SLVS363E – AUGUST 2001 – REVISED SEPTEMBER 2007
The TPS31xx family has a quiescent current in the 1-
μA to 2-μA range. When RESET is active, triggered by the
voltage monitored at VDD, the quiescent current increases to about 20 μA (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 VDD. The TPS3106 has two
reset outputs. One output (RSTVDD) is triggered from the voltage monitored at VDD. 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 VDD. 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:
VTRIP is the voltage of the battery at which a reset is asserted and
VIT(S) is the threshold voltage at SENSE = 0.551 V.
R1 was chosen for a resistor current in the 1-
μA range.
With VTRIP = 1.6 V:
R1
≡ 1.9
× R2
R1 = 820 k
, R2 = 430 k
Figure 8. Battery Monitoring with 3-
μA Supply Current for Device and Resistor Divider
Copyright 2001–2007, Texas Instruments Incorporated
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS3103H20DBVT | 功能描述:监控电路 Lw A & V RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TPS3103H20DBVTG4 | 功能描述:监控电路 Current/Supply-Volt Supervisory RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TPS3103H20DVB | 制造商:TI 制造商全称:Texas Instruments 功能描述:ULTRALOW SUPPLY CURRENT/SUPPLY VOLTAGE SUPERVISORY CIRCUITS |
| TPS3103H20DVBR | 制造商:TI 制造商全称:Texas Instruments 功能描述:ULTRALOW SUPPLY CURRENT/SUPPLY VOLTAGE SUPERVISORY CIRCUITS |
| TPS3103H33DVB | 制造商:TI 制造商全称:Texas Instruments 功能描述:ULTRALOW SUPPLY CURRENT/SUPPLY VOLTAGE SUPERVISORY CIRCUITS |
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