參數(shù)資料
型號(hào): MIC2310-2ZTS TR
廠商: Micrel Inc
文件頁(yè)數(shù): 20/34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 
20
M9999-070108-A
 
HW_FLT Digital Output Asserted by MOSFET DS
Short with ENABLE = LOW
In order to protect the system from the result of the
installation of a damaged MOSFET on the PCB, the
controller   incorporates   a   MOSFET   shorted   DS
detection scheme whose operation is described in
Figure 8. With the applied V
CC
 supply high such that
the internal V
REG
  voltage is above the controllers
V
VREG(UVLOH)
 threshold voltage, an elapsed POR timer,
and with the ENABLE input LOW, a voltage monitor
circuit for the controllers SOURCE pin is enabled. If
there is a DS short on the MOSFET, the external load
on the MOSFET is not capable of holding the voltage
at 0V as the SOURCE voltage tracks the MOSFETs
DRAIN voltage. The voltage monitor circuit at the
controllers SOURCE pin will be triggered once the
SOURCE voltage crosses the V
SRCFT(EXT)
  threshold
voltage. The HW_FLT digital output is subsequently
asserted within a delay approximately equal to the
delay in the logic circuits  no additional timing circuit
is required. To clear the latched source voltage
monitor circuit and to reset the HW_FLT digital output,
the applied V
CC
  supply voltage must fall such that
V
REG
  is below the controllers V
VREG(UVLOL)
  threshold
voltage.
 
 
 
 
 
Figure 8. Hardware Fault Detection of a MOSFET DS Short with ENABLE = LOW
 
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