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參數(shù)資料
| 型號： | ADM1172-1AUJZ-RL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 電源管理 |
| 英文描述： | 2.7 V to 16.5 V Hot Swap Controller with Power-Fail Comparator |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | LEAD FREE, MO-193BA, TSOT-8 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大小： | 181K |
| 代理商： | ADM1172-1AUJZ-RL7 |
ADM1172
threshold. The device can be reset by toggling the ON-CLR
or by manually pulling the TIMER pin low. On the ADM1172-1,
the TIMER pin activates the 2 μA pull-down once the 1.3 V
threshold is reached, and continues to pull down until it reaches
the 0.2 V threshold. At this point, the 100 μA pull-down is
activated and the GATE pin is enabled. The device keeps
retrying in the manner as shown in
Rev. 0 | Page 14 of 16
The ADM1172-2 model has a latch off system whereby when a
current fault is detected, the GATE is switched off after a time
determined by the timer capacitor (see
Toggling the ON-CLR pin, or pulling the TIMER pin to GND
for a brief period, resets this condition.
pin
Figure 41 for details).
5μA
COMP1
COMP2
SHORT-
CIRCUIT
EVENT
60μA
V
TIMER
V
OUT
V
GSFET
I
RSENSE
0
Figure 40.
The duty cycle of this automatic retry cycle is set to the ratio of
2 μA/60 μA, which approximates 3.8% on. The value of the
timer capacitor determines the on time of this cycle. This time
is calculated as follows:
t
ON
= 1.3 ×
C
TIMER
/60 μA
t
OFF
= 1.1 ×
C
TIMER
/2 μA
2μA
COMP1
COMP2
SHORT-
CIRCUIT
EVENT
60μA
100μA
V
TIMER
V
OUT
V
GSFET
I
RSENSE
FAULT
CYCLE
FAULT
CYCLE
0
Figure 41. ADM1172-2 Latch Off After Overcurrent Fault
POWER-FAIL COMPARATOR
The ADM1172 has an integrated comparator that can be used
as a power
-
fail/OV/UV detector. The comparator has a 0.6 V
reference, and it is designed to be active high when the voltage
on the PFI pin drops to below this threshold. The only action
that results from the PFI pin tripping the comparator is the
change of state on the PFO pin. The PFI pin can be used to
monitor the supply on either side of the FET, for an OV or UV
condition set by a resistor divider network. The PFO can then
be sent to a control system and used as a power-good/power-fail
signal. The PFO output has a 5 μA internal pull-up. A 10 kΩ
resistor is recommended on the PFO pin to ensure that it is
either pulled up or down during power-up. The pin is in high
impedance while V
CC
< UVLO and can result in invalid power-
fail signals.
Figure 40. ADM1172-1 Automatic Retry During Overcurrent Fault
AUTOMATIC RETRY OR LATCHED OFF
The ADM1172 is available in two models. The ADM1172-1
has an automatic retry system whereby when a current fault is
detected, the FET is shut down after a time determined by the
timer capacitor, and it is switched on again in a controlled con-
tinuous cycle to determine if the fault remains (see Figure 40
for details). The period of this cycle is determined by the timer
capacitor at a duty cycle of 3.8% on and 96.2% off.
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| ADM1172-2AUJZ-RL7 | 功能描述:IC CTRLR HOTSWAP 16.5V TSOT-23-8 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 |
| ADM1175 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Hot Swap Controller and Digital Power Monitor with Convert Pin |
| ADM1175-1ARMZ-R7 | 功能描述:IC CTRLR HOTSWAP 16.5V 10-MSOP 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)品目錄頁面:1423 (CN2011-ZH PDF) |
| ADM1175-2ARMZ-R7 | 功能描述:IC CTRLR HOTSWAP 16.5V 10-MSOP 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 |
| ADM1175-3ARMZ-R7 | 功能描述:IC CTRLR HOTSWAP 16.5V 10-MSOP 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)品目錄頁面:1423 (CN2011-ZH PDF) |
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