參數(shù)資料
型號: LTC4214-1IMS#TRPBF
廠商: Linear Technology
文件頁數(shù): 22/32頁
文件大?。?/td> 277K
描述: IC CTRLR HOTSWAP NEGVOLT 10MSOP
標準包裝: 2,500
類型: 熱交換控制器
應用: 通用
內部開關:
電源電壓: 6 V ~ 16 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應商設備封裝: 10-MSOP
包裝: 帶卷 (TR)
LTC4214-1/LTC4214-2
22
421412f
Figure 10. Undervoltage Timing (All Waveforms are Referenced to V
EE
)
APPLICATIO  S I FOR  ATIO
U
U
U
(40礎 + 8 " I
DRN
) current pull-up. As the load capacitor
nears full charge, load current begins to decline. At point
8, the load current falls and the SENSE voltage drops below
V
ACL
(t). The analog current limit loop shuts off and the
GATE pin ramps further. At time point 9, the SENSE voltage
drops below V
CB
 and the fault TIMER cycle ends, followed
by a 5礎 discharge cycle (cool off). When GATE ramps
past V
GATEH
 threshold at time point 10, PWRGD pulls low.
At time point 11, GATE reaches its maximum voltage as
determined by V
IN
.
Undervoltage Timing
In Figure 10 when the UV pin drops below V
UVHI
  V
UVHST
(time point 1), the LTC4214 shuts down with TIMER, SS
and GATE all pulling low. If current has been flowing, the
SENSE pin voltage decreases to zero as GATE collapses.
When UV recovers and clears V
UVHI
 (time point 2), an
initial timer cycle begins followed by a start-up cycle.
UV
TIMER
GATE
SENSE
SS
DRAIN
PWRGD
5礎
50礎
5礎
5礎
50礎
UV DROPS BELOW V
UVHI
  V
UVHST
. GATE, SS AND TIMER ARE PULLED DOWN, PWRGD RELEASES
1
2
3 4 56    7   89
TIMER CLEARS V
TMRL
, CHECK GATE < V
GATEL
, SENSE < V
CB
 AND SS < 20 " V
OS
1011
4214 F10
UV CLEARS V
UVHI
, CHECK OV CONDITION, GATE < V
GATEL
, SENSE < V
CB
, SS < 20 " V
OS
 AND TIMER < V
TMRL
V
ACL
V
CB
40礎 + 8 " I
DRN
20 " V
OS
V
IN
  V
GATEH
V
DRNL
V
DRNCL
20 " (V
CB
 + V
OS
)
20 " (V
ACL
 + V
OS
)
V
GATEL
V
TMRL
V
TMRH
V
UVHI
V
UVHI
 
V
UVHST
GATE
START-UP
INITIAL TIMING
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