參數(shù)資料
型號(hào)： LT4356MPS-2
廠商： LINEAR TECHNOLOGY CORP
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PDSO16
封裝： 0.150 INCH, PLASTIC, SOP-16
文件頁(yè)數(shù)： 3/24頁(yè)
文件大?。?/td> 214K
代理商： LT4356MPS-2
LT4356MP-1/LT4356MP-2
11
4356mp12fa
Fault Timer Current
The timer current starts at around 2μA with 0.5V or less
of VDS, increasing linearly to 50μA with 75V of VDS dur-
ing an overvoltage fault (Figure 1). During an overcurrent
fault, it starts at 4μA with 0.5V or less of VDS but increases
to 260μA with 80V across the MOSFET (Figure 2). This
arrangement allows the pass transistor to turn off faster
during an overcurrent event, since more power is dissipated
during this condition. Refer to the Typical Performance
Characteristics section for the timer current at different
VDS in both overvoltage and overcurrent events.
When the voltage at the TMR pin, VTMR, reaches the 1.25V
threshold, the FLT pin pulls low to indicate the detection
of a fault condition and provide warning to the load of
the impending power loss. In the case of an overvoltage
fault, the timer current then switches to a xed 5μA. The
interval between FLT asserting low and the MOSFET turn-
ing off is given by:
tWARNING =
CTMR 100mV
5A
APPLICATIONS INFORMATION
Figure 1. Overvoltage Fault Timer Current
Figure 2. Overcurrent Fault Timer Current
tFLT
= 15ms/μF
TOTAL FAULT TIMER = tFLT + tWARNING
tWARNING
= 20ms/μF
tFLT = 93.75ms/μF
tWARNING
= 20ms/μF
VTMR(V)
ITMR = 5μA
VDS = 75V
(ITMR = 50μA)
VDS = 10V
(ITMR = 8μA)
1.35
1.25
TIME
4356mp12 F01
0.50
tFLT
= 2.88ms/μF
TOTAL FAULT TIMER = tFLT + tWARNING
tFLT = 21.43ms/μF
tWARNING
= 2.86ms/μF
tWARNING
= 0.38ms/μF
VTMR(V)
VDS = 10V
(ITMR = 35μA)
1.35
1.25
0.50
TIME
4356mp12 F02
VDS = 80V
(ITMR = 260μA)
相關(guān)PDF資料
PDF描述
LT4356MPMS-1 SPECIALTY ANALOG CIRCUIT, PDSO10
LT4356MPMS-1#TR SPECIALTY ANALOG CIRCUIT, PDSO10
LT505-CHIP AUDIO AMPLIFIER, UUC8
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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LT4356MPS-2TR 制造商:LINER 制造商全稱:Linear Technology 功能描述:Surge Stopper
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