參數(shù)資料
型號(hào): MAX5954LETX+T
廠商: Maxim Integrated
文件頁(yè)數(shù): 18/22頁(yè)
文件大小: 1027K
描述: IC PCI EXP/HOT-PLUG CTRLR 36TQFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 2,500
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: 36-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 36-TQFN 裸露焊盤(pán)(6x6)
包裝: 帶卷 (TR)
Single PCI Express, Hot-Plug
Controller
18   ______________________________________________________________________________________
N
Y
POWER-ON MAIN
SUPPLIES FAULT
AND PWRGD ARE
HIGH IMPEDANCE
N
ENABLE CHARGE ON
12G AND 3.3G
PINS. START
COUNTING tSU
HAS t
SU
 
ELAPSED?
N
POWER-ON AUXILIARY
SUPPLIES FAULT
AND PWRGD ARE
HIGH IMPEDANCE
N
ENABLE CHARGE ON
INTERNAL AUXILIARY
MOSFET, BEGIN
COUNTING t
SU
HAS tSU ELAPSED?
N
Y
N
Y
Y
ARE PWRGD
THRESHOLDS
REACHED?
ASSERT
 PWRGD
AFTER t
POR_HL
 DELAY
12V AND 3.3V
OUTPUTS
ARE ENABLED
WAS CURRENT
LIMIT DETECTED ON ANY
12V OR
3.3V OUTPUT?
START COUNTING
t
FAULT
HAS t
FAULT
ELAPSED?
N
Y
RESET t
FAULT
COUNTER
Y
SHUT DOWN
12V AND 3.3V OUTPUTS.
ASSERT FAULT
STAY WAITING FOR
t
RESTART
LATCH-OFF
OPTION?
Y
STAY WAITING FOR
ON_ TRANSITION
HIGH->LOW->HIGH
AUX SUPPLY OUTPUT
IS ENABLED
WAS CURRENT LIMIT
DETECTED ON AUXILIARY
OUTPUT?
IS tFAULT
ELAPSED?
N
N
Y
Y
SHUT DOWN
ALL OUTPUTS,
ASSERT FAULT,
STAY WAITING FOR
tRESTART ELAPSED.
LATCH-OFF
OPTION?
Y
RESET FAULT
AND
RESTART ALL SUPPLIES
STAY WAITING FOR BOTH
ON AND AUXON
TRANSITION
HIGH->LOW->HIGH
RESET FAULT
AND
RESTART 12V, 3.3V
SUPPLIES
IS FAULT STILL
PRESENT?
Y
N
IS FAULT STILL
PRESENT?
N
START COUNTING
tFAULT
RESET t
FAULT
COUNTER
RESET
 PWRGD
AFTER t
POR_LH
 DELAY
3.3AUXIN IS ON
AND ABOVE UVLO
Figure 6. Fault Management Flow Chart
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