參數(shù)資料
型號(hào): MIC2310-2ZTS TR
廠商: Micrel Inc
文件頁(yè)數(shù): 21/34頁(yè)
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(kāi)關(guān): 無(wú)
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 
21
M9999-070108-A
 
HW_FLT Asserted by MOSFET DS Short after
Steady-state Operation then ENABLE = HIGH-to-
LOW
Figure 9 illustrates the behavior of the controller to a
shorted DS MOSFET condition after steady-state
operation is achieved via a nominal start-up. Note that
the load capacitor at start-up was charged in a
controlled dI
D
/dt mode and assertion of the controllers
PWRGD digital output occurs when the output load
voltage profile is higher than the controllers V
PGH
 
threshold   voltage   and   the   V
GS
   of   the   external
MOSFET is higher than the controllers V
GSPGH
 
threshold voltage. Upon the application of a HIGH-to-
LOW transition on ENABLE by the service processor,
the GATE drive circuit is disabled, the weak GATE
current sink is enabled, the DISCH output goes high,
and the t
DS-SSFAULT
 timer is started. With the ENABLE
input LOW, a voltage monitor circuit for the controllers
SOURCE pin (i.e., V
OUT
) is 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.
 
 
Figure 9. Hardware Fault by a MOSFET DS Short after Steady-State Operation
 (ENABLE = HIGH-to-LOW)
 
 
 
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