參數資料
型號: MIC2310-2ZTS TR
廠商: Micrel Inc
文件頁數: 29/34頁
文件大?。?/td> 473K
描述: IC HOT SWAP CTLR 2CHAN 24TSSOP
標準包裝: 2,500
類型: 熱交換控制器
應用: 通用
內部開關:
電流限制: 可調
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)
供應商設備封裝: 24-TSSOP
包裝: 帶卷 (TR)
Micrel, Inc.
MIC2310
 
 
July 2008 
29
M9999-070108-A
 
Open LOADSENSE Detector Trips CB
In order to protect the system from the result of an
open LOADSENSE pin, the controller incorporates an
open   LOADSENSE   detection   scheme.   An   open
LOADSENSE pin could result in the effective primary
OC detection threshold being at an unsafe level. The
timing diagram in Figure 15 describes the operation of
this function. 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 application of an ENABLE LOW-to-HIGH
transition, the GATE drive circuitry is enabled and the
GATE   voltage   begins   to   rise.   As   the   external
MOSFET turns ON, the SOURCE voltage begins to
rise also. Normally, the LOADSENSE voltage would
rise with the SOURCE voltage. However, if the
LOADSENSE pin is open, the LOADSENSE voltage
will remain at a lower voltage due to the load of other
internal   circuitry.   An   open   LOADSENSE   pin   is
detected by comparing the voltage at the SOURCE
pin to the voltage at the LOADSENSE pin. Once the
voltage at the SOURCE pin differs from the voltage at
the LOADSENSE pin by V
THLOADSENSE
, a circuit
breaker   is   tripped,   the   GATE   drive   circuitry   is
disabled, the GATE fault-mode pull-down current sink
is enabled, and the DISCH output goes high. This
circuit breaker can be reset, such that the GATE drive
circuitry can be re-enabled, by either a HIGH-to-LOW
transition on ENABLE or turning 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
LOADSENSE
DISCH
V
VREG(UVLOL)
VGSPGH
V
PGH
t
POR
V
VREG(UVLOH)
V
THLOADSENSE
LOADSENSE OPEN
VVREG(UVLOH)
LOADSENSE CONNECTED
t
POR
 
 
Figure 15. Open LOADSENSE Detector Trips CB
 
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