參數(shù)資料
型號： ICL7665SACBAZ
廠商： INTERSIL CORP
元件分類： 電源管理
英文描述： CMOS Micropower Over/Under Voltage Detector
中文描述： 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝： ROHS COMPLIANT, MS-012AA, SOIC-8
文件頁數(shù)： 9/14頁
文件大小： 361K
代理商： ICL7665SACBAZ
9
FN3182.8
April 5, 2006
Applications
Single Supply Fault Monitor
Figure 12 shows an over/under voltage fault monitor for a
single supply. The overvoltage trip point is centered around
5.5V and the undervoltage trip point is centered around 4.5V.
Both have some hysteresis to prevent erratic output ON and
OFF conditions. The two outputs are connected in a wired
OR configuration with a pullup resistor to generate a power
OK signal.
Multiple Supply Fault Monitor
The ICL7665S can simultaneously monitor several supplies
when connected as shown in Figure 13. The resistors are
chosen such that the sum of the currents through R
21A
,
R
21B
, and R
31
is equal to the current through R
11
when the
two input voltage are at the desired low voltage detection
point. The current through R
11
at this point is equal to
1.3V/R
11
. The voltage at the V
SET
input depends on the
voltage of both supplies being monitored. The trip voltage of
one supply while the other supply is at the nominal voltage
will be different that the trip voltage when both supplies are
below their nominal voltages.
The other side of the ICL7665S can be used to detect the
absence of negative supplies. The trip points for OUT1
depend on both the negative supply voltages and the actual
voltage of the +5V supply.
TABLE 1. SET-POINT EQUATIONS
NO HYSTERESIS
Overvoltage V
TRIP
=
R
11
+ R
21
R
11
x V
SET1
Overvoltage V
TRIP
=
R
12
+ R
22
R
12
x V
SET2
HYSTERESIS PER FIGURE 10A
V
U1
=
R
11
+ R
21
+ R31
R
11
x V
SET1
Overvoltage V
TRIP
R
11
+ R
21
V
L1
=
R
11
x V
SET1
V
U2
=
R
12
+ R
22
+ R
32
R
12
x V
SET2
Undervoltage V
TRIP
V
L2
=
R
12
+ R
22
R
12
x V
SET2
HYSTERESIS PER FIGURE 11
V
U1
=
R
11
+ R
21
R
11
x V
SET1
Overvoltage V
TRIP
V
L1
=
R
11
+
R
21
R
31
R
21
+ R
31
x V
SET1
R
11
V
U2
=
R
12
+ R
22
R
12
x V
SET2
Overvoltage V
TRIP
V
L2
=
R
12
+
R
22
R
32
R
22
+ R
32
x V
SET2
R
12
OUT1
SET1
SET2
OUT2
V+
R
21
R
P
V
IN
R
P
R
22
R
11
R
12
HYST1
HYST2
R
31
R
32
FIGURE 11. AN ALTERNATIVE HYSTERESIS CIRCUIT
HYST1
V
SET1
V
SET2
HYST2
V+
OUT1
OUT2
324k
13M
5%
100k
249k
7.5M
5%
+5V SUPPLY
POWER
OK
100k
1M
V+
OPEN VOLTAGE
DETECTOR
V
U
= 5.55V
V
L
= 5.45V
OPEN VOLTAGE
DETECTOR
V
U
= 4.55V
V
L
= 4.45V
R
22
R
32
R
1
R
1
R
31
R
21
FIGURE 12. FAULT MONITOR FOR A SINGLE SUPPLY
ICL7665S
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICL7665SACBAZ 制造商:Intersil Corporation 功能描述:Voltage Detector / Microprocessor Superv
ICL7665SACBAZA 功能描述:電壓監(jiān)測器/監(jiān)控器 W/ANNEAL CMOS OVER/ UNDER V DETECTOR RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準(zhǔn)確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風(fēng)格:SMD/SMT
ICL7665SACBAZA-T 功能描述:電壓監(jiān)測器/監(jiān)控器 W/ANNEAL CMOS OVER/ UNDER V DETECTOR RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準(zhǔn)確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風(fēng)格:SMD/SMT
ICL7665SACBAZ-T 功能描述:電壓監(jiān)測器/監(jiān)控器 CMOS OVER/UNDER V DETECTOR COM RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準(zhǔn)確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風(fēng)格:SMD/SMT
ICL7665SACJA 制造商:Rochester Electronics LLC 功能描述:- Bulk
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