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參數(shù)資料
| 型號(hào)： | LTC1642 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Dual LinCMOS(TM) Timer 14-PDIP |
| 中文描述： | 熱插拔控制器 |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大?。?/td> | 147K |
| 代理商： | LTC1642 |
9
LTC 1642
The OV and FB Comparators
The propagation delay through the OV and FB compara-
tors on low to high transitions depends strongly on the
differential input voltage. The relationship is shown in
Figure 11. The minimum propagation delay for large
overdrives is about 20
μ
s. In addition the comparators
have 3mV of hysteresis.
Internal Voltage Clamp Protection
The LTC1642 includes a shunt regulator to protect itself
from V
CC
and SENSE pin voltages up to 33V. The regulator
turns on when V
CC
exceeds 16.5V and limits most of the
chip’s circuitry to 15V. When it is on the chip functions
normally with one exception: if the charge pump is on, the
GATE voltage is usually near ground but this is not
guaranteed. Use the OV pin to ensure that GATE is grounded.
The pull-up voltage on the RESET and FAULT pins follows
V
CC
until the shunt regulator turns on. When the regulator
is on the pull-up voltage is 14.4V.
goes low at time 7, and GATE begins charging at time 8,
one RST TMR cycle after FAULT goes high.
Figure 10 shows typical waveforms when the OV divider is
driven from the N-channel’s low side. Because the voltage
driving the divider collapses after the OV comparator trips,
FAULT stays high and CRWBR stays near ground, which
prevents the pin from triggering an SCR. The GATE voltage
begins ramping up after a RST TMR timing cycle.
Automatic Restart
If there is an overvoltage, and the resistor divider feeding
OV is connected to the output of the N-channel pass
transistor, the LTC1642 will automatically restart even if
FAULT is not tied to ON. If the divider is connected to the
input side, the LTC1642 will restart itself only if FAULT is
tied to ON, and only after the overvoltage clears.
APPLICATIO S U
U
W
U
0V
1.23V
0V
0.41V
1.23V
1642 F10
6 7
5
4
3
2
1
GATE
V
OUT
V
CC
OV
RST TMR
FAULT
0V
CRWBR
Figure 10. Overvoltage Timing (Low Side)
OV OVERDRIVE (mV)
0
40
80
120
160
200
240
O
μ
s
1642 F11
70
60
50
40
30
20
10
0
Figure 11. OV Comparator Propagation Delay vs
Overdrive Voltage
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1642C | 8-Bit, 40 MSPS ADC Single Ch., Internal S&H, Low Power 24-SO 0 to 70 |
| LTC1642CGN | Hot Swap Controller |
| LTC1642I | 8-Bit, 40 MSPS ADC Single Ch., Internal S&H, Low Power 24-TSSOP 0 to 70 |
| LTC1643ALCGN | PCI-Bus Hot Swap Controller |
| LTC1643AHIGN | JT 5C 5#20 SKT RECP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1642ACGN | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 16.5V 16-Pin SSOP N |
| LTC1642ACGN#PBF | 功能描述:IC CONTROLLER HOTSWAP ADJ 16SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
| LTC1642ACGN#TRPBF | 功能描述:IC CONTROLLER HOTSWAP ADJ 16SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
| LTC1642AIGN | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 16.5V 16-Pin SSOP N |
| LTC1642AIGN#PBF | 功能描述:IC CONTROLLER HOTSWAP ADJ 16SSOP 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(kāi)關(guān):無(wú) 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) |
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