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參數(shù)資料
| 型號： | 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)： | 15/15頁 |
| 文件大小： | 497K |
| 代理商： | TD230IDT |
TD230
9/15
Do
no
t u
se
for
new
design
Proper operation of this step-up converter is guar-
anteed at as low as 2.7V with a rise time (0 to 90%
of V(C
BOOST)) in the range of 700s at 2.7V which
is the worst case. At 5V, the rise time of V(C
BOOST)
is 250
s typ. The C
BOOST voltage wave form at
power ON under 5V supply voltage is shown on
figure 6.
Figure 6 : Step Up Converter Rise Time
Trace 1 represents the power supply voltage (0 to
5V).
Trace 2 represents the CBOOST Voltage at power
ON (0 to 5+13,4 = 18,4V).
Table (a) summerizes the recommended values
of the CBOOST and LBOOST to ensure optimized gate
charge and low ripple voltage with their corre-
sponding maximum current surge (I
PK) and nomi-
nal consumption (I
CC) of the TD230 for the most
common power supply values. For each power
supply value is also given the recommended value
of a bypass capacitor (C
BY)
on the power sup-
plies.
Note that both C
BOOST and LBOOST are available in
surface mount packages.
Table (a) : Recommended values for CBOOST and
LBOOST
2.4. Single Supply Breaker Application
The TD230 is perfectly suited to fit in single sup-
plied applications (ex 0-5V), and can drive only
one power MOSFET used as high side power
switch.
Figure 7 shows how TD230 can be used as a sin-
gle circuit breaker with the same performances.
Figure 7 : Single Electronic Circuit Breaker
Application
In this case, the external components consist in
one boost inductor, one sense resistor, three ca-
pacitors, and one power MOSFET.
2.5. Typical Telecom Line Cards Protection
Application
One of the typical applications where the TD230
can display all its technical advantages is in an ex-
change Telecom Cards protection. Sometimes fif-
ty cards or more are to be supplied with the same
power supply (+/-5V, 1kW), and a decentralized
protection is needed because one card may be
faulty, but should not penalize the others with un-
adapted protection system. The risk of complete
breakdown of the system must be eradicated.
In this application the two above described over
current causes (external line perturbation or inter-
nal component fault) are likely to happen. In the
first case, the current limitation on each card will
ensure undammaging on-board conditions, and in
the second case, the faulty card will be disjoncted
from the power supply until reset.
Figure 8 shows a typical telecom application with
decentralized protection.
In this application, the positive power supply
serves the logic control and analog signals where-
as the negative power supply is dedicated to the
analog.
VCC
+
V
CBOOST
nF
LBOOST
H
Ipk
mA
Vrip
mV
ICC
mA
Cby
F
2.7
47
100
68
60
190
100
5>1
5
100
220
35
120
2.5
1
10
100
220
470
33
220
100
2.2
1
12
220
470
39
150
2.2
1
14
220
680
34
150
2.4
1
18
220
1000
31
200
2.7
1
2
3
4
5
6
7
8
Vcc+
GND
LBOOST
CTRIP1
CBOOST
9
10
11
12
13
14
15
16
CONTROL
PVcc
LBOOST
CBOOST
PM1
GND
PM2
OSCGND
NVcc
REF1
GC1
SENSP
INHIBIT
SHUTDOWN
SENSN
GC2
REF2
RS1
NMos
to BOARD
CSS1
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 |
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| TD231-1000S | 制造商:TE Connectivity 功能描述:TIME DELAY RELAY - Trays |
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