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参数资料
| 型号： | LTC4212IMS#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 20/24页 |
| 文件大小： | 234K |
| 描述： | IC CTRLR HOTSWAP TIMEOUT 10MSOP |
| 标准包装： | 2,500 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 2.5 V ~ 16.5 V |
| 工作温度： | -40°C ~ 85°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： | 带卷 (TR) |
20
LTC4212
4212f
OPERATIO
by the SLOW COMPs threshold, V
CB(SLOW)
= 50mV, and
occurs should a load current fault condition exist for more
than 18祍. The current level at which the electronic circuit
breaker trips is given by Equation 8:
I
V
R
mV
R
TRIP SLOW
CB SLOW
SENSE
SENSE
(
)
(
)
=
=
50
(8)
The second trip point is set by the FAST COMPs threshold,
V
CB(FAST)
= 150mV, and occurs during fast load current
transients that exist for 500ns or longer. The current level
at which the circuit breaker trips in this case is given by
Equation 9:
I
V
R
mV
R
TRIP FAST
CB FAST
SENSE
SENSE
(
)
(
)
=
=
150
(9)
As a design aid, the currents at which electronic circuit
breaker trips for common values for R
SENSE
are shown in
Table 4.
Table 4. I
TRIP(SLOW)
and I
TRIP(FAST)
vs R
SENSE
R
SENSE
I
TRIP(SLOW)
I
TRIP(FAST)
0.005&
10A
30A
0.006&
8.3A
25A
0.007&
7.1A
21A
0.008&
6.3A
19A
0.009&
5.6A
17A
0.01&
5A
15A
For proper circuit breaker operation, Kelvin-sense PCB
connections between the sense resistor and the LTC4212s
V
CC
and SENSE pins are strongly recommended. The
drawing in Figure 7 illustrates the correct way of making
connections between the LTC4212 and the sense resistor.
PCB layout should be balanced and symmetrical to mini-
mize wiring errors. In addition, the PCB layout for the
sense resistor should include good thermal management
techniques for optimal sense resistor power dissipation.
The power rating of the sense resistor should accommo-
date steady-state fault current levels so that the compo-
nent is not damaged before the circuit breaker trips.
Table 5 in the Appendix lists sense resistors that can be
used with the LTC4212s circuit breaker.
Calculating Circuit Breaker Trip Current
For a selected R
SENSE
value, the nominal load current that
trips the circuit breaker is given by Equation 10:
IRC-TT SENSE RESISTOR
LR251201R010F
OR EQUIVALENT
0.01&, 1%, 1W
CURRENT FLOW
TO LOAD
CURRENT FLOW
TO LOAD
TO
V
CC
TO
SENSE
TRACK WIDTH W:
0.03" PER AMP
ON 1 OZ COPPER
W
4212 F07
Figure 7. Making PCB Connections to the Sense Resistor
I
V
R
mV
R
TRIP NOM
CB NOM
SENSE NOM
SENSE NOM
(
)
(
)
(
)
(
)
=
=
50
(10)
The minimum load current that trips the circuit breaker is
given by Equation 11.
I
V
R
mV
R
TRIP MIN
CB MIN
SENSE MAX
SENSE MAX
( )
( )
( )
( )
=
=
40
(11)
where
R
R
R
SENSE MAX
SENSE NOM
TOL
( )
(
)
"
=
+
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
1
100
The maximum load current that trips the circuit breaker is
given in Equation 12.
I
V
R
mV
R
TRIP MAX
CB MAX
SENSE MIN
SENSE MIN
( )
( )
( )
( )
=
=
60
(12)
where
R
R
R
SENSE MIN
SENSE NOM
TOL
( )
(
)
"
=
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
1
100
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4213 | 制造商:LINER 制造商全称:Linear Technology 功能描述:No RSENSE? Electronic Circuit Breaker |
| LTC4213CDDB | 制造商:LINER 制造商全称:Linear Technology 功能描述:No RSENSE? Electronic Circuit Breaker |
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| LTC4213CDDB#TRMPBF | 功能描述:IC CIRC BREAK ELEC 8-DFN RoHS:是 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装 |
| LTC4213CDDB#TRPBF | 功能描述:IC CIRC BREAK ELEC 8-DFN RoHS:是 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装 |
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