- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄381940 > ICL8212 (Intersil Corporation) Programmable Voltage Detectors PDF資料下載
參數(shù)資料
| 型號： | ICL8212 |
| 廠商： | Intersil Corporation |
| 英文描述： | Programmable Voltage Detectors |
| 中文描述： | 可編程電壓檢測器 |
| 文件頁數(shù)： | 13/14頁 |
| 文件大小： | 153K |
| 代理商： | ICL8212 |
7-173
ICL8211, ICL8212
Since there is no internal compensation in the ICL8212 it is
necessary to use a large capacitor across the output to
prevent oscillation.
Zener voltages from 2V to 30V may be programmed and typ-
ical impedance values between 300
μ
A and 25
μ
A will range
from 4
to 7
. The knee is sharper and occurs at a signifi-
cantly lower current than other similar devices available.
FIGURE 32. CONSTANT CURRENT SOURCE APPLICATIONS
FIGURE 33. PROGRAMMABLE ZENER VOLTAGE REFERENCE
Precision Voltage Regulator (Figure 34)
The ICL8212 may be used as the controller for a highly sta-
ble series voltage regulator. The output voltage is simply pro-
grammed, using a resistor divider network R
1
and R
2
. Two
capacitors C
1
and C
2
are required to ensure stability since
the ICL8212 is uncompensated internally.
FIGURE 34. PRECISION VOLTAGE REGULATOR
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
I
=
OR
V+
I
I = 25
μ
A (ICL8212)
I = 130
μ
A (ICL8211)
ICL
8212
V
TH
OUT
V+
I
S
V+
500K
150K
R
2
R
1
+
–
V
Z
5
μ
F
6
5
4
3
2
1
0
0.01
0.1
1.0
10
100
SUPPLY CURRENT (mA)
Z
1
2
3
4
8
7
6
5
V+
R
3
V+
R
1
R
2
C
2
UNREG-
ULATED
DC SUPPLY
ICL8212
Q
1
C
1
V
OUT
=R
2
+ R
1
R
1
x 1.15V
This regulator may be used with lower input voltages than
most other commercially available regulators and also con-
sumes less power for a given output control current than any
commercial regulator. Applications would therefore include
battery operated equipment especially those operating at
low voltages.
High Supply Voltage Dump Circuit (Figure 35)
In many circuit applications it is desirable to remove the
power supply in the case of high voltage overload. For
circuits consuming less than 5mA this may be achieved
using an ICL8211 driving the load directly. For higher load
currents it is necessary to use an external pnp transistor or
darlington pair driven by the output of the ICL8211.
Resistors R
1
and R
2
set up the disconnect voltage and R
3
provides optional voltage hysteresis if so desired.
FIGURE 35. HIGH VOLTAGE DUMP CIRCUITS
Frequency Limit Detector (Figure 36)
Simple frequency limit detectors providing a GO/NO-GO out-
put for use with varying amplitude input signals may be con-
veniently implemented with the ICL8211/8212. In the
application shown, the first ICL8212 is used as a zero cross-
ing detector. The output circuit consisting of R
3
, R
4
and C
2
results in a slow output positive ramp. The negative range is
much faster than the positive range. R
5
and R
6
provide hys-
teresis so that under all circumstances the second ICL8212
is turned on for sufficient time to discharge C
3
. The time con-
stant of R
7
C
3
Is much greater than R
4
C
2
. Depending upon
the desired output polarities for low and high input frequen-
cies, either an ICL8211 or an ICL8212 may be used as the
output driver.
This circuit is sensitive to supply voltage variations and
should be used with a stabilized power supply. At very low
frequencies the output will switch at the input frequency.
Switch Bounce Filter (Figure 37)
Single pole single throw (SPST) switches are less costly and
more available than single pole double throw (SPDT) switches.
1
2
3
4
8
7
6
5
R
1
R
2
R
3
ICL8211
V-
V+
(a)
1
2
3
4
8
7
6
5
R
1
R
2
R
3
ICL8211
V-
V+
CIRCUIT
BEING
PROTECTED
V-
V+
(b)
R
4
CIRCUIT
BEING
PROTECTED
V-
V+
相關PDF資料 |
PDF描述 |
|---|---|
| ICL8212CTY | Programmable Voltage Detectors |
| ICL8212MTY | Programmable Voltage Detectors |
| ICL8212CPA | FUSE, 5X20MM, 5A SB |
| ICM7209 | TIMEBASE GENERATOR |
| ICP-N15 | Circuit protection elements |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ICL8212/D WAF | 制造商:Harris Corporation 功能描述: |
| ICL8212CBA | 制造商:Harris Corporation 功能描述: |
| ICL8212CBA DIE | 制造商:Harris Corporation 功能描述: |
| ICL8212CBA WAF | 制造商:Harris Corporation 功能描述: |
| ICL8212CBA-T | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復。