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参数资料
| 型号： | TD230IDT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | MICRO, PLASTIC, SO-16 |
| 文件页数： | 4/15页 |
| 文件大小： | 497K |
| 代理商： | TD230IDT |
TD230
12/15
Do
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TD230IN | 功能描述:电源开关 IC - 配电 Circuit Breaker RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| TD230N | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:ELECTRONIC CIRCUIT BREAKER |
| TD231 | 制造商:未知厂家 制造商全称:未知厂家 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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