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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： | 14/15页 |
| 文件大小： | 497K |
| 代理商： | TD230IDT |
TD230
8/15
Do
no
t u
se
for
new
design
conditions, the capacitors C
TRIP 1/2 are constantly
discharged by another fixed current source IP/N3
which value is a fourth of I
P/N2
(1
A).
Figure 3 : Fault Time Limitation
Trace 1 represents the C
BOOST
Voltage (0 to
5+13,4 = 18,4V)
Trace 2 represents the C
TRIP1 Voltage.
The value of the capacitors C
TRIP 1/2 should be cho-
sen in relation with the required protection time as
indicated in equation (iv) :
u C
TRIP1/2 = (IP/N2 - IP/N3) x tPROTECT1/2 / VSPN/3(iv)
where t
PROTECT 1/2 is the time defined by the user be-
fore a definitive resettable shutdown of MOS-
FET
1/2.
Equation (iv) can be translated to :
u C
TRIP 1/2 = tPROTECT 1/2 x 3A / 1.20V (iv)
Note that the positive power supply disjonction
leads to the negative power supply disjonction,
whereas the opposite is not true.
2.3. Step-Up Converter
To ensure proper voltage on the gate of the posi-
tive supply NMOS1 (V
GS = 13.4V typ), the TD230
integrates a step-up converter which is to be
boosted with two small low cost external compo-
nents : an inductor L
BOOST and a capacitor CBOOST,
as shown in figure 4.
Figure 4 : Step Up Converter External
Components
The principle of this inductive step-up converter is
to pump charges in the tank capacitor C
BOOST fol-
lowing the equation (v) :
Figure 5 : Internal Step Up Schematic
u V(C
BOOST) = VCC+ + 13.4V typ (v)
Charges are pumped by means of an oscillator
commanded switch, and stored in the C
BOOST tank
capacitor through a diode as shown on figure 5.
When
the
voltage
across
C
BOOST
reaches
VCC
++13.4V typ, the oscillator is stopped. This cre-
ates a ripple voltage with an amplitude of 0.2V.
Note that the min and max values of V(C
BOOST)
comprised between V
CC
+ +10V and V
CC
+ +15V al-
ready take the ripple voltage into account.
Rsense
MOS
Lboost
Cboost
Sense
Step Up
Driver
TD230
Lboost
Cboost
TD230
Osc
Regulation
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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