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參數(shù)資料
| 型號(hào)： | MAX6459UT_-T |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Voltage, Low-Current Voltage Monitors in SOT Packages |
| 中文描述： | 高電壓，低電流電壓監(jiān)測(cè)器采用SOT封裝 |
| 文件頁(yè)數(shù)： | 11/15頁(yè) |
| 文件大?。?/td> | 232K |
| 代理商： | MAX6459UT_-T |
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remains high. When V
CC
exceeds V
TRIPHIGH
, OUTB
asserts low while OUTA remains high. V
TRIPLOW
and
V
TRIPHIGH
are given by the following equations:
where R
TOTAL
= R1 + R2 + R3.
Use the following steps to determine the values for R1,
R2, and R3.
1) Choose a value for R
TOTAL
, the sum of R1, R2, and
R3. Because the MAX6458/MAX6459 have very
high input impedance, R
TOTAL
can be up to 5M
.
2) Calculate R3 based on R
TOTAL
and the desired
upper trip point:
V
V
TRIPHIGH
3) Calculate R2 based on R
TOTAL
, R3, and the desired
lower trip point:
4) Calculate R1 based on R
TOTAL
, R3, and R2:
R1 = R
TOTAL
- R2 - R3
Example Calculations for Window
Detection
The following is an example for calculating R1, R2, and
R3 of Figure 11 for window detection. Select the upper
and lower trip points (V
TRIPHIGH
and V
TRIPLOW
).
V
CC
= 21V
V
TRIPHIGH
= 23.1V
V
TRIPLOW
= 18.9V
For 5% hysteresis, V
TH
+ = 1.228 and V
TH
- = 1.167.
1) Choose R
TOTAL
= 4.2M
= R1 + R2 + R3
2) Calculate R3
3) Calculate R2
R
V
R
V
V
23 1
M
V
k
TH
TOTAL
TRIPHIGH
3
1 228
223 273
.
=
×
=
=
+
)(4 2
.
)
R
V
R
V
R
TH
TOTAL
TRIPLOW
2
3
=
×
-
-
R
R
TH
TOTAL
3
=
×
+
V
V
R
R
R
V
V
R
R
TRIPLOW
TH
TOTAL
+
2
TRIPHIGH
TH
TOTAL
3
=
=
+
-
3
M
High-Voltage, Low-Current Voltage Monitors in
SOT Packages
______________________________________________________________________________________
11
MAX6457
–
MAX6460
V
MON
V
CC
V
CC
R1
R2
GND
R
PULLUP
IN+
OUT
(OUTB FOR
MAX6459)
OUT
(OUTB)
Figure 12. Monitoring Voltages Other than V
CC
MAX6457
–
MAX6460
V
CC
GND
R
PULLUP
OUT/
OUTA/
OUTB
OUT/
OUTA/
OUTB
V
CC
(4V TO 28V)
V
OUT
(UP TO 28V)
Figure 13. Interfacing to Voltages Other than V
CC
MAX6460
V
CC
V
CC
R1
R2
GND
V
NEG
R
PULLUP
IN+
REF
IN-
OUT
OUT
Figure 14. Monitoring Negative Voltages
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| MAX6460UT+T | 功能描述:監(jiān)控電路 Single Low C/V Voltage Monitor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)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(kāi)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 |
| MAX6460UT-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)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(kāi)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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