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參數(shù)資料
| 型號(hào)： | LT1640LIS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Negative Voltage Hot Swap Controller |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SO-8 |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大?。?/td> | 292K |
| 代理商： | LT1640LIS8 |
9
LT1640L/LT1640H
APPLICATIO
S I
N
FOR
ATIO
U
Under some conditions, a short circuit at the output can
cause the input supply to dip below the UV threshold,
resetting the circuit breaker immediately.
The LT1640 then cycles on and off repeatedly until the
short is removed. This can be minimized by adding a
deglitching delay to the UV pin with a capacitor from UV to
V
EE
. This capacitor forms an RC time constant with the
resistors at UV, allowing the input supply to recover before
the UV pin resets the circuit breaker.
A circuit that automatically resets the circuit breaker after
a current fault is shown in Figure 9.
Transistors Q2 and Q3 along with R7, R8, C4 and D1 form
a programmable one-shot circuit. Before a short occurs,
W
U
the GATE pin is pulled high and Q3 is turned on, pulling
node 2 to V
EE
. Resistor R8 turns off Q2. When a short
occurs, the GATE pin is pulled low and Q3 turns off. Node
2 starts to charge C4 and Q2 turns on, pulling the UV pin
low and resetting the circuit breaker. As soon as C4 is fully
charged, R8 turns off Q2, UV goes high and the GATE
starts to ramp up. Q3 turns back on and quickly pulls node
2 back to V
EE
. Diode D1 clamps node 3 one diode drop
below V
EE
. The duty cycle is set to 10% to prevent Q1 from
overheating.
Undervoltage and Overvoltage Detection
The UV (Pin 3) and OV (Pin 2) pins can be used to detect
undervoltage and overvoltage conditions at the power
V
EE
V
DD
LT1640L
PWRGD
SENSE
C1
0.033
μ
F
24V
C4
1
μ
F
100V
C3
100
μ
F
100V
Q1
IRF530
R2
10
5%
R8
510k
5%
R3
10k
5%
C2
3.3nF
100V
R4
562k
1%
R7
1M
5%
R5
9.09k
1%
R6
10k
1%
Q3
ZVN3310
Q2
2N2222
D1
1N4148
R1
0.02
5%
4
3
2
OV
GND
–48V
UV
5
6
8
7
1
GATE
DRAIN
1640 F09a
3
2
+
Figure 9. Automatic Restart After Current Fault
1640 F09b
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1640LIS8#PBF | 功能描述:IC CONTRLR HOTSWAP NEGVOLT 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁(yè)面:1423 (CN2011-ZH PDF) |
| LT1640LIS8#PBF | 制造商:Linear Technology 功能描述:Hot Swap Controller IC |
| LT1640LIS8#TR | 功能描述:IC CTRLR HOTSWAP NEG VOLT 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LT1640LIS8#TRPBF | 功能描述:IC CONTRLR HOTSWAP NEGVOLT 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LT1641 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Positive High Voltage Hot Swap Controller |
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