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| 型号： | MIC2595R-2YM |
| 厂商： | Micrel Inc |
| 文件页数： | 21/29页 |
| 文件大小： | 4205K |
| 描述： | IC CTRLR HOT SWAP NEG HV 14-SOIC |
| 标准包装： | 54 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | -19 V ~ -80 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SOIC |
| 包装： | 管件 |
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Micrel
MIC2589/MIC2595
December 2005
21
M9999-120505
(408) 955-1690
1
14
13
5
4
3
2
/PWRGD1
CFILTER
CNLD
VEE
/PWRGD3
PGTIMER
GATE
/PWRGD2
SENSE
VDD
-48V
OUT
-48V RTN
C
TIMER
R2
11.8k
1%
C
FILTER
2.2礔
C
NLD
0.068礔
*C2
0.1礔
R
SENSE
0.01
5%
R4
10
M1
SUM110N10-09
C1
0.47礔
*D1
SMAT70A
-48V RTN
(Long Pin)
-48V RTN
(Long Pin)
-48V RTN
(Short Pin)
System
Reset
UV
MIC2589-2BM
DRAIN
OV
8
7
6
12
10
11
9
N/C
R1
689k
1%
*C3
0.1礔
*M2
*D2
ZMM5266B
C4
0.1礔
C5
100礔
R5
47k
R3
12.4k
1%
*Optional components (See Functional Description and Applications Information for more details)
M2 is an SOT-323, B8S138W or equivalent
D2 is a 68V, 500mW Zener diode
Figure 7. Optional Components for Added Performance/Protection
The circuit in Figure 7 consisting of M2, R5, and a
digital control signal, can be used to reset the
controller after the GATE (and output) turns off. Once
the output has been latched off, applying a low-high-
low pulse on the GATE of M2 via the System Enable
control can toggle the UV pin. System Enable is a
user-defined signal referenced to V
EE
.
Sense Resistor Selection
The sense resistor is nominally valued at:
om)
HOT_SWAP(n
TRIP(typ)
SENSE(nom)
I
V
R
=
where V
TRIP(TYP)
is the typical (or nominal) circuit
breaker threshold voltage (50mV) and I
HOT_SWAP(NOM)
is
the nominal load current level necessary to trip the
internal circuit breaker.
To accommodate worse-case tolerances in the sense
resistor (for a ?% initial tolerance, allow ?%
tolerance for variations over time and temperature)
and circuit breaker threshold voltages, a slightly more
detailed calculation must be used to determine the
minimum and maximum hot swap load currents.
As the MIC2589s minimum current limit threshold
voltage is 40mV, the minimum hot swap load current
is determined where the sense resistor is 3% high:
(
)
SENSE(nom)
SENSE(nom)
in)
HOT_SWAP(m
R
38.8mV
R
1.03
40mV
I
=
?/DIV>
=
Keep in mind that the minimum hot swap load current
should be greater than the application circuits upper
steady-state load current boundary. Once the lower
value of R
SENSE
has been calculated, it is good
practice to check the maximum hot swap load current
(I
HOT_SWAP(MAX)
) that the circuit may let pass in the case
of tolerance build-up in the opposite direction. Here,
the worse case maximum is found using a V
TRIP(MAX)
threshold of 60mV and a sense resistor 3% low in
value:
(
)
SENSE(nom)
SENSE(nom)
ax)
HOT_SWAP(m
R
61.9mV
R
0.97
60mV
I
=
?/DIV>
=
In this case, the application circuit must be sturdy
enough to operate up to approximately 1.5x the
steady-state hot swap load current. For example, if an
MIC2589 circuit must pass a minimum hot swap load
current of 4A without nuisance trips, R
SENSE
should be
set to:
10m&
4A
40mV
R
SENSE(nom)
=
=
where the nearest 1% standard value is 10.0m&. At
the other tolerance extremes, I
HOT_SWAP(MAX)
for the
circuit in question is then simply:
6.19A
10m&
61.9mV
I
ax)
HOT_SWAP(m
=
=
With a knowledge of the application circuits maximum
hot swap load current, the power dissipation rating of
the sense resistor can be determined using P = I
2
?R.
Here, the current is I
HOT_SWAP(max)
= 6.19A and the
resistance
R
SENSE(max)
= (1.03)(R
SENSE(nom)
) = 10.3m&.
Thus, the sense resistors maximum power dissipation
is:
P
MAX
= (6.19A)
2
?(10.3m&) = 0.395W
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相关代理商/技术参数 |
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|---|---|
| MIC2595R-2YM TR | 功能描述:热插拔功率分布 Negative Voltage Hot-Swap Controller - Lead Free RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MIC2595R-2YM-TR | 功能描述:Hot Swap Controller, Sequencer 1 Channel -48V 14-SOIC 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 类型:热交换控制器，序列发生器 通道数:1 内部开关:无 应用:-48V 特性:自动重试 可编程特性:限流，故障超时，UVLO 电压 - 电源:-80 V ~ -19 V 电流 - 输出（最大值）:- 工作温度:-40°C ~ 85°C 电流 - 电源:4mA 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商器件封装:14-SOIC 功能引脚:CFILTER，CNLD，DRAIN，PGTIMER，OFF，ON，/PWRGD1，/PWRGD2，/PWRGD3 标准包装:1 |
| MIC2596-1BTS | 功能描述:IC SWITCH HOT SWAP DUAL 20-TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| MIC2596-1BTS TR | 功能描述:IC SWITCH HOT SWAP DUAL 20-TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| MIC2596-1BTSE | 功能描述:IC SWITCH HOT SWAP DUAL 20-TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
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