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參數(shù)資料
| 型號： | TC1271ARVCTTR |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | LEAD FREE, PLASTIC, SOT-23, 5 PIN |
| 文件頁數(shù)： | 19/48頁 |
| 文件大?。?/td> | 541K |
| 代理商： | TC1271ARVCTTR |
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TC1270A/70AN/71A
DS22035D-page 26
2007-2011 Microchip Technology Inc.
5.4
Modifying The Trip Point, VTRIP
Although the TC127XA device has a fixed voltage trip
point (VTRIP), it can be necessary to make custom
adjustments. This is accomplished by connecting an
external resistor divider to the TC127XA VDD pin. This
causes the VSOURCE voltage to be higher than it is
when the TC127XA input equals its VTRIP voltage
(Figure 5-5).
To maintain detector accuracy, the bleeder current
through the divider should be significantly higher than
the 15 A maximum operating current required by the
TC127XA. A reasonable value for this bleeder current
is 1 mA (67 times the 10 A required by the TC127XA).
For example, if VTRIP = 2V and the desired trip point is
2.5V, the value of R1 + R2 is 2.5 k (2.5V/1 mA). The
value of R1 + R2 can be rounded to the nearest
standard value and plugged into the equation shown in
1% tolerance resistors are recommended.
FIGURE 5-5:
Modifying Trip-Point using
External Resistor Divider.
5.5
MOSFET Low-Drive Protection
Low operating power and small physical size make the
TC1270AN series ideal for many voltage detector
applications. Figure 5-6 shows a low-voltage gate drive
protection circuit that prevents the logic-level MOSFET
from overheating due to insufficient gate voltage. When
the input signal is below the threshold of the
TC1270AN, its output grounds the gate of the
MOSFET.
FIGURE 5-6:
MOSFET Low-Drive
Protection.
TC127XA
VDD
RST
VSS
R1
VSOURCE
R2
or RST
V
SOURCE
R
1
R
1
R
2
+
--------------------
V
TRIP
Where:
Note: In this example, VSOURCE must be greater
than VTRIP.
VSOURCE = Voltage to be monitored
VTRIP = Threshold Voltage setting
VDD
RST
VSS
TC1270AN
270
(1)
MTP3055EL
VDD
RL
VTRIP
Note 1:
This resistance should be sized appro-
priately for the selected trip point volt-
age related to the VOL operation.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| TC1271ARVRCTR | 功能描述:監(jiān)控電路 4Pin uP Reset Mon 4.63V Reset Thresh RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(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 |
| TC1271ASBVCTTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
| TC1271ASBVRCTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
| TC1271ASCVCTTR | 功能描述:監(jiān)控電路 Vltg Detector 2.93V Reset Threshold RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(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 |
| TC1271ASCVRCTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
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