參數(shù)資料
型號: MIC2310-2ZTS TR
廠商: Micrel Inc
文件頁數(shù): 22/34頁
文件大?。?/td> 473K
描述: IC HOT SWAP CTLR 2CHAN 24TSSOP
標(biāo)準(zhǔn)包裝: 2,500
類型: 熱交換控制器
應(yīng)用: 通用
內(nèi)部開關(guān):
電流限制: 可調(diào)
電源電壓: 10.8 V ~ 13.2 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 24-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 24-TSSOP
包裝: 帶卷 (TR)
Micrel, Inc.
MIC2310
 
 
July 2008 
22
M9999-070108-A
 
HW_FLT Asserted by MOSFET DS Short after
Steady-state Operation then a Fault Condition
Figure 10 illustrates the behavior of the controller to a
shorted DS MOSFET condition after steady-state
operation is achieved via a nominal start-up. With the
occurrence of one of the following fault conditions 
UVLO, OVP, primary OC, secondary OC, open
LOADSENSE, or open GNDSENSE - the GATE drive
circuit is disabled, the GATE fault-mode pull-down
current sink is enabled, the DISCH output goes high,
and the t
DS-SSFAULT
 timer is started. The occurrence of
a primary OC fault condition is shown here. The
voltage monitor circuit for the controllers SOURCE
pin is also enabled. If there is a DS short, the voltage
at the source will not drop to 0V even though the
GATE is OFF. If the output voltage at the SOURCE
pin remains higher than the controllers V
SRCFT(EXT)
 
threshold    voltage    when    the    t
DS-SSFAULT
    timer
terminates, the HW_FLT digital output is asserted. To
repair the damaged MOSFET and to reset the
HW_FLT digital output and the controller, the service
processor instructs the main supply to turn off the V
CC
 
supply voltage to the controller such that V
REG
  falls
below the controllers V
VREG(UVLOL)
  threshold voltage.
 
 
 
V
CC
 & V
REG
ENABLE
GATE
V
OUT
I
LOAD
PWRGD
I_FLT
HW_FLT
DISCH
V
VREG(UVLOL)
VVREG(UVLOH)
DG Short
V
GSPGH
VPGH
t
POR
t
DS-SSFAULT
t
POR
VSRCFT(EXT)
t
POC
VVREG(UVLOH)
V
GSPGH
V
PGL
 
 
Figure 10. HW_FLT Asserted by a MOSFET DS Short after Steady-State Operation then a Fault Condition
 
 
 
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