?/DIV>
Eq. 7
The closest standard ?% tolerance capacitor value is
3.3礔 and would be a good initial starting value for
prototyping.
Whenever the MIC2586 is not in current limit, C
TIMER
is
discharged to GND by an internal 3.5礎(chǔ) current sink
(I
TIMERDN
).
For the MIC2586R, the circuit breaker automatically
resets after (20) t
FLT_AUTO
time constants. If the fault
condition still exists, capacitor C
TIMER
will begin to charge
up to the V
TIMERH
threshold, and if exceeded, trip the
circuit breaker.
Capacitor C
TIMER
will then be discharged by I
TIMERDN
until
the voltage across C
TIMER
drops below the V
TIMERL
threshold, at which time another start cycle is initiated.
This will continue until any of the following occurs:
a) The fault condition is removed.
b) The input supply voltage power is removed/cycled
c) The ON pin is toggled LOW then HIGH.
The duty cycle of the auto-restart function is therefore
fixed at 5% and the period of the auto-restart cycle is
given by:
(
) (
)
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
=
?/DIV>
?/DIV>
=
?/DIV>
=
礔
ms
250
C
I
V
V
C
20
t
20
TIMER
RESTART
AUTO
TIMERUP
TIMERL
TIMERH
TIMER
RESTART
AUTO
FLT_AUTO
RT
AUTO_RESTA
Eq. 8
The auto-restart period for the example above where the
worse-case C
TIMER
was calculated to be 3.3礔 is:
825ms
RE TART
-
A T
=
Input Undervoltage Lockout
The MIC2586/MIC2586R have an internal undervoltage
lockout circuit that inhibits operation of the controllers
internal circuitry unless the power supply voltage is
stable and within an acceptable tolerance. If the supply
voltage to the controller with respect to ground is greater
than the V
UVH
threshold voltage (8V typical), the
controllers internal circuits are enabled and the
controller is then ready for normal operation pending the
state of the ON pin voltage. Once in steady-state
operation, the controllers internal circuits remain active
so long as the supply voltage with respect to ground is
higher than the controllers internal V
UVL
threshold
voltage (7.5V typical).
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
| MIC2586R-2YM |
功能描述:熱插拔功率分布 Positive High Voltage Hot-Swap Controller/Sequencer - Lead Free
RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MIC2586R-2YM TR |
功能描述:熱插拔功率分布 Positive High Voltage Hot-Swap Controller/Sequencer - Lead Free
RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MIC2587-1BM |
功能描述:IC CTRLR HOTSWAP 1CHAN POS 8SOIC RoHS:否 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:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(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 |
| MIC2587-1BM TR |
功能描述:IC CTRLR HOT SWAP POS HV 8-SOIC RoHS:否 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:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(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 |
| MIC2587-1YM |
功能描述:熱插拔功率分布 Positive High Voltage Hot-Swap Controller - Lead Free
RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
