参数资料
型号: MAX5957LETN+T
厂商: Maxim Integrated
文件页数: 19/25页
文件大小: 634K
描述: IC TRPL PCI EXP/HOT-PLUG 56-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
类型: 热交换控制器
应用: 通用型,PCI Express?
内部开关:
电源电压: 3.3V,12V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 56-WFQFN 裸露焊盘
供应商设备封装: 56-TQFN-EP(7x7)
包装: 带卷 (TR)
Triple PCI Express, Hot-Plug Controllers
______________________________________________________________________________________   19
ENABLE CHARGE ON
INTERNAL AUXILIARY
MOSFET DRIVING 3.3AUXO_.
START COUNTING t
SU
FAULT ON 12V
OR 3.3V OUTPUTS
RESET t
FAULT
COUNTER
FAULT
STILL PRESENT?
Y
Y
Y
Y
Y
SHUT DOWN
12V AND 3.3V OUTPUTS.
ASSERT FAULT_
STAY WAITING FOR
t
RESTART
t
FAULT
 ELAPSED?
N
N
N
N
3.3VAUXIN IS OK,
AUXON_ IS HIGH,
PRES_DET IS LOW
RESET FAULT_
START COUNTING
t
FAULT
Y
N
N
N
ARE ALL
MAIN OUTPUTS OK?
NO FAULT
DETECTED
LATCH-OFF
OPTION?
N
ON_ TOGGLED
HIGH e LOW e HIGH
MAIN INPUTS ARE
OK, ON_ IS HIGH
Y
Y
N
ENABLE CHARGE
 ON 3.3G_ AND 12G_.
START
COUNTING t
SU
t
SU
 
ELAPSED?
Y
START PGOOD
THRESHOLD
MONITORING
START COUNTING
t
FAULT
ALL PGOOD
THRESHOLDS
REACHED?
N
N
N
N
Y
Y
Y
Y
ASSERT PWRGD_
AFTER t
POR_HL
 
DELAY
RESET PWRGD_
POWER ON
AUXILIARY OUTPUT.
FAULT_ AND PWRGD_ ARE
HIGH IMPEDANCE
SHUT DOWN ALL OUTPUTS.
ASSERT FAULT_.
STAY WAITING
FOR tRESTART
RESET FAULT_
ON_ AND
AUXON_ TOGGLED
HIGH e LOW
e HIGH
t
SU
 
ELAPSED?
AUX OUTPUT OK?
NO FAULT DETECTED
FAULT ON 3.3AUXO_?
N
N
t
FAULT
 ELAPSED?
Y
FAULT
STILL PRESENT?
N
Y
Y
LATCH-OFF
OPTION?
RESET t
FAULT
COUNTER
Figure 6. Fault Management Flowchart
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