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參數資料
| 型號： | HT7039A |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Voltage Detector |
| 中文描述： | 電壓檢測器 |
| 文件頁數： | 8/16頁 |
| 文件大小： | 162K |
| 代理商： | HT7039A |
HT70XX
Rev. 1.60
8
January 14, 2003
5V power line monitoring circuit
Generally, a minimum operating voltage of 4.5V is guar-
anteed in a 5V power line system. The HT7044A is rec-
ommended for use as 5V power line monitoring circuit.
5V power line monitor with power-on reset
with 5V voltage regulator
Change of detectable voltage
If the required voltage is not found in the standard prod-
uct selection table, it is possible to change it by using ex-
ternal resistance dividers or diodes.
Varying the detectable voltage with a resistance di-
vider
Detectable voltage =R
R
R
R
A
B
B
V
DET
Hysteresis width =R
R
A
B
B
V
HYS
Varying the detectable voltage with a diode
Detectable Voltage = V
f1
+V
f2
+V
DET
Malfunction analysis
The following circuit demonstrates the way a circuit ana-
lyzes malfunctions by monitoring the variation or spike
noise of power supply voltage.
Charge monitoring circuit
The following circuit shows a charged monitor for pro-
tection against battery deterioration by overcharging.
Whenthevoltageofthebatteryishigherthanthesetde-
tectable voltage, the transistor turns on to bypass the
charge current, protecting the battery from overcharg-
ing.
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'
(
)
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(
(
* ! +
+ & * !
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! ,
* !
* *
相關PDF資料 |
PDF描述 |
|---|---|
| HT7044A | Voltage Detector |
| HT7050A | Voltage Detector |
| HT7070A | Voltage Detector |
| HT70XX | Voltage Detector |
| HT71XX-1 | 30mA Voltage Regulator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HT7039A(SOT89) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage Detector |
| HT7039A(TO92) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage Detector |
| HT7039A-1 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:TinyPower Voltage Detector |
| HT7039A-2 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:TinyPowerTM Voltage Detector |
| HT7039A-3 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:TinyPowerTM Voltage Detector |
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