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參數(shù)資料
| 型號(hào)： | TD230IDT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | MICRO, PLASTIC, SO-16 |
| 文件頁數(shù)： | 4/15頁 |
| 文件大?。?/td> | 497K |
| 代理商： | TD230IDT |
TD230
12/15
Do
no
t u
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for
new
design
Figure 10 : Visual Alarm-Shutdown
where C
ISS1/2 , CSS1/2 , VTH1/2 , IP/N1 are respectively
the input capacitance, the soft start capacitor, the
threshold voltage and the internal gate current
sources of NMOS
1/2 ; and where VSP1/2 , CTRIP1/2 , IP/
N2
are respectively the voltage source, current
source and external capacitor of the protection
mode pins PM
1/2. Considering the typical values of
V
SP1/2, IP/N2, IP/N1, and the fact that classical power
MOSFETs have a threshold voltage around 5V,
this condition can be translated to inequation (vi) :
u C
TRIP1/2 > 0.8 x (CSS1/2 + CISS ) (vi)
If C
ISS = 1nF and CSS1/2 = 4.7nF, CTRIP1/2 should be
superior to 4.56nF.
Table (b) summerizes Protection Mode Time
Constants corresponding to different CTRIP1/2 val-
ues.
Table (b) : Protection Mode Time Constants
5. ENHANCEMENTS
The performances of TD230 are well adapted to
most of the circuit breaking applications in many
differents industry segments (Telecom, Automo-
tive, Industrial, Computer etc...), but in the case of
very demanding environment, or outstanding fea-
tures, the few following advices may be helpful.
5.1. Step-Up Noise Reduction
The inductive step-up converter inevitably gener-
ates current peaks in the output of the power
switch which, in most cases are, are not worrying.
But in some very demanding applications, it is
necessary to remove this noise.
A good way to eliminate such peaks is to add a re-
sistor connected in series with the inductance and
an electrolytic capacitor between the common
point of resistor and inductance, and ground of the
Step-Up Converter as shown on figure 11.
Figure 11 : Step Up Noise Reduction
The resistor’s voltage drop will be due to the prod-
uct of the average consumption current with the
resistor’s value and the inductive current peaks
will be totally absorbed by the capacitor. With a
100
resistor, the voltage drop is negligible and
the attenuation good with a 4.7
F as shown on
figure 12.
Figure 12 : Step Up Noise Reductio
CTRIP1/2
Time Constant Range
for Protection Mode
- Shutdown -
22nF
#10ms
220nF
#100ms
2.2
F#1s
22
F
#10s
TD230
Shutdown
Vcc+
Rsense
Lboost
Cboost
TD230
C
R
Do
no
t u
se
for
new
design
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TD230IN | 功能描述:電源開關(guān) IC - 配電 Circuit Breaker RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| TD230N | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:ELECTRONIC CIRCUIT BREAKER |
| TD231 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Technical Specifications for 5 kA, Normal-Duty Distribution 4.5 kV and 5 kV VariSTAR?? MOV Disks |
| TD231-1000P | 制造商:TE Connectivity 功能描述:TIME DELAY RELAY - Trays |
| TD231-1000S | 制造商:TE Connectivity 功能描述:TIME DELAY RELAY - Trays |
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