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參數(shù)資料
| 型號(hào)： | RP-21203F3-870 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSS20 |
| 封裝： | FP-20 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大?。?/td> | 335K |
| 代理商： | RP-21203F3-870 |
6
Data Device Corporation
www.ddc-web.com
RP-21200
Rev. C
FIGURE 4.
STAR Series PROGRAMMING CURVES
RP Unit
OPEN
Note 1a
I3
Note 1b
I2
Note 1c
R1
Note 1d
RP-21203
1
1.5
2.4
3
RP-21225
RP-21209
8.3
3
12.5
4.5
20
7.2
25
9
TABLE 5. PRESET PROGRAMMED
CURRENT RATINGS
Preset Current Settings (amperes): See Note 2
Notes:
1) The RP-212XX series current rating programming is as follows:
a) Minimum current is set by not connecting R1, I2, or I3.
b) The first quarter program rating requires connecting I3 to the program
reference pin.
c) The third quarter program rating requires connecting I2 to the program
reference pin.
d) The Maximum Current Rating is programmed by connecting the R1 pro-
gramming pin to the program reference pin directly.
2) An external resistor connected between the R1 input range programming
pin and program reference pin will provide infinite resolution current setting.
Reference FIGURE 4 (
STAR Series Current Programming curves).
0
20
40
60
80
100
120
10
100
1K
10K
100K
1M
(R1) Ohms
%
of
Maxim
um
Rated
Current
Set Current (% of Max)
0
20
40
60
80
100
10
100
1K
10K
100K
1M
(R2) Ohms
%
of
Rated
Current
Load Detect (%)
0
500
1000
1500
2000
2500
10
100
1K
10K
100K
(R3) Ohms
%
of
Rated
Current
Instant Trip (%)
3000
3500
1
Connections), FIGURE 4 (STAR Series Programming Curves),
and TABLE 5 (Preset Current Ratings for further details).
The Instant Trip level is independently programmable from a
nominal 200% to 3000% of the SSPCs programmed current rat-
ing. Using the RP-21203 as an example, if the current rating
range is programmed for 3 Amps [by using external R1 = 0
(shorted)], then the instant trip will be programmed from 6 to 90
Amps. On the other hand, if R1 = 4 (left open), the instant trip
can be programmed from 2 to 30 Amps. Therefore, the Instant
Trip level remains a fixed percentage of the current rating range.
The Status 1 load detect programming works the same way as the
Instant Trip level programming. The range for the Status 1 Load
detect is 10% to 95% of the SSPCs programmed current rating.
PROGRAMMING
The STAR Series can be programmed for Current Rating, Instant
Trip level and Load Detection Level. Figures 3 and 4, TABLE 5
and the Programming Explanation give detailed information on
how to program these SSPCs.
The Current Rating for each of the RP-21200 series SSPCs can
be varied over a three-to-one range to tailor each application for
the wire’s I2t rating as described above. The Current Rating can
be programmed for any value in the range by using an external
resistor. Additionally, preset programmed Current Ratings of
50%, 80% and 100% of Maximum Rated Current can be imple-
mented by simply connecting together the appropriate pins. A
Current Rating of 33% of Maximum Rated Current occurs with
no programming connections.
The Load Detection Level determines the current which will con-
trol the Status 1 output. When the load current is below the Load
Detection level, the Status 1 output is at a logic high and goes
low when the load current rises above the Load Detection level.
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