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參數(shù)資料
| 型號： | LTC1153 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Auto-Reset Electronic Circuit Breaker |
| 中文描述： | 自動復(fù)位電子斷路器 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 342K |
| 代理商： | LTC1153 |
9
LTC1153
should be connected across the load, as shown in Figure
2, to safely divert the stored energy.
Capacitive Loads
Large capacitive loads, such as complex electrical sys-
tems with large bypass capacitors, should be powered
using the circuit shown in Figure 3. The gate drive to the
power MOSFET switch is passed through an RC delay
network, R1 and C1, which greatly reduces the turn on
ramp rate of the switch. And since the MOSFET source
voltage follows the gate voltage, the load is powered
smoothly and slowly from ground. This dramatically re-
duces the start-up current flowing into the supply capaci-
tor/s which, in turn, reduces supply transients and allows
for slower activation of sensitive electrical loads. (Diode,
D1, provides a direct path for the LTC1153 protection
circuitry to quickly discharge the gate).
U
S
A
O
PPLICATI
U
U
Using the values shown in Figure 3, the start-up current is
less than 100mA and does not false-trip the breaker.
Lamp Loads
The inrush current created by a lamp during turn-on can be
10 to 20 times greater than the rated operating current.
The circuit shown in Figure 4 shifts the trip threshold up by
a factor of 11:1 (to 30A) for 100ms while the bulb is turned
on. The trip threshold then drops down to 2.7A after the
inrush current has subsided.
The RC network, R
D
and C
D
, in series with the drain sense
input should be set to trip based on the expected charac-
teristics of the load afterstart-up. With this circuit, it is
possible to power a large capacitive load and still react
quickly (10
μ
s) to break the circuit if a short-circuit condi-
tion is encountered. The ramp rate at the output of the
switch as it lifts off ground is approximately:
dV/dt = (V
GATE
– V
TH
)/(R1
×
C1)
And therefore the current flowing into the capacitor during
start-up is approximately:
I
START-UP
= C
LOAD
×
dV/dt
BREAKER CURRENT (1 = SET CURRENT)
1
0.01
T
10
10
100
LTC1153 F05
1
0.1
Figure 5. Trip Delay Time vs Breaker Current
Selecting R
D
and C
D
Figure 5 is a graph of normalized breaker trip time versus
breaker current. This graph is used to select the two delay
components, R
D
and C
D
, which make up a simple RC delay
between the drain sense resistor and the drain sense input.
Figure 3. Powering Large Capacitive Loads
IN
C
T
STATUS
GND
V
S
DS
G
SD
LTC1153
C
0.47
μ
F
+
470
μ
F
MTP3055E
15V
12V
0.036
LTC1153 F03
C
0.01
μ
F
R
1OOk
R1
1OOk
R2
1OOk
C1
0.33
μ
F
D1
1N4148
+
C
LOAD
100
F
OUT
IN
C
T
STATUS
GND
V
S
DS
G
SD
LTC1153
C
T
0.33
μ
F
+
470
μ
F
MTP3055EL
9.1V
12V
0.036
LTC1153 F04
10k
1M
0.1
μ
F
VN2222LL
100k
12V/1A
BULB
Figure 4. Lamp Driver with Delayed Protection
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1153C | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Auto-Reset Electronic Circuit Breaker |
| LTC1153CN8 | 功能描述:IC ELECTRNC CIRCUIT BREAKER 8DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| LTC1153CN8#PBF | 功能描述:IC ELECTRNC CIRCUIT BREAKER 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| LTC1153CS8 | 功能描述:IC ELECTR CIRCUIT BREAKER 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| LTC1153CS8#PBF | 功能描述:IC ELECTR CIRCUIT BREAKER 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:熱電冷卻器 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.173"，4.40mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:28-TSSOP 裸露焊盤 包裝:管件 產(chǎn)品目錄頁面:1410 (CN2011-ZH PDF) |
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