参数资料
型号: LTC4211CMS
厂商: Linear Technology
文件页数: 32/40页
文件大小: 321K
描述: IC CONTROLLER HOT SWAP 10-MSOP
标准包装: 50
类型: 热交换控制器
应用: 通用
内部开关:
电源电压: 2.5 V ~ 16.5 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-MSOP
包装: 管件
LTC4211
32
4211fb
APPLICATIONS INFORMATION
1
V
CC
ON
TIMER
GATE
RESET
FILTER
>V
REF
 80mV
FAULT
V
OUT
GATE
V
OUT
2
3
5
6
7
2A
4
8
A
B
C
SLOW COMPARATOR ARMED
IF OVERVOLTAGE GOES
AWAY, SECOND CYCLE
CONTINUES
OVERVOLTAGE
IF ANY FAULT HAPPENS
AFTER THIS POINT, THE
CIRCUIT BREAKER TRIPS
AND FAULT LATCHES LOW
OVERVOLTAGE CIRCUIT BREAKER
TRIPS, GATE PULLS DOWN AND
FAULT LATCHES LOW
FAULT IS PULLED LOW (BUT NOT LATCHED)
DUE TO A START-UP OVERVOLTAGE PROBLEM
POWER GOOD
V
FB
 > V
REF
POWER BAD
V
FB
 < V
REF
FPD
4211 F24
>V
REF
FAULT
LATCHED LOW
Low Side (Output) Overvoltage Protection
A Zener diode can be used in a similar fashion to detect/
protect the system against a supply overvoltage condition
on the load (or low) side of the pass transistor. In this
case, the Zener diode is connected from the load to the
LTC4211s FILTER pin, as shown in Figure 25. An additional
diode, D1, prevents the FILTER pin from pulling low during
an output short-circuit. Figure 26 illustrates the timing
diagram for a low side output overvoltage condition. In
this example, V
CC
 starts up in an overvoltage condition
but the LTC4211 can only sense the overvoltage supply
condition at Time Point 6 when the GATE pin has ramped
up. At Time Point 6, V
FILTER
 is greater than 1.236V, the
circuit breaker is tripped, the GATE pin voltage is pulled
to ground and FAULT is asserted low and latched.
Figure 24. High Side Overvoltage Protection
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相关代理商/技术参数
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