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參數(shù)資料
| 型號： | MCZ34652EF |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 2.0 A Negative Voltage Hot Swap Controller with Enhanced Programmability |
| 中文描述： | 2.0負(fù)電壓熱插拔控制器與可編程性增強(qiáng) |
| 文件頁數(shù)： | 21/26頁 |
| 文件大?。?/td> | 647K |
| 代理商： | MCZ34652EF |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
21
34652
TYPICAL APPLICATIONS
The low charging current value of I
CHG
is intended to limit
the temperature increase during the load capacitor charging
process, and the gradual rise to I
CHG
is to prevent transient
dips in the input voltage due to sharp increases in the limit
current. This prevents the input voltage from drooping due to
current steps acting on the input line inductance, and that in
turn prevents a premature activation of the UV detection
circuit.
Choosing the External Resistor R
ICHG
Value
The user can change the value of the charging current limit
by adding a resistor (R
ICHG
) between the ICHG and VIN pins,
as shown in
Figure 19
,
page 18
. The charging current value
ranges between 50 mA and 500 mA, with a default value of
100 mA.
Table 7
lists examples of R
ICHG
for different values
of I
CHG
and
Figure 21
shows a plot of R
ICHG
versus I
CHG
It is
recommended that the closest 1% standard resistor value to
the actual value be chosen.
Note
Accuracy requirements are application dependent.
To calculate the value of the R
ICHG
resistor we use the
following equations:
I
CHG
(A)
= [ R
ICHG
(k
) + 1.4 k
] / 335
R
ICHG
(k
) = 335
*
I
CHG
(A)
- 1.4 k
Table 7. R
ICHG
Values for Some Desired I
CHG
Values
Figure 21. External Resistor (R
ICHG
) Value Versus
Charging Current Limit Value (I
CHG
)
Choosing the External Capacitor C
ICHG
Value
The user can also change the charging current rise time by
adding a capacitor (C
ICHG
) between the ICHG and VIN pins
,
as shown in
Figure 19
,
page 18
. The charging current rise
time ranges between 1.0 ms (default value) and a
recommended maximum of 10 ms.
Table 8
lists examples of
C
ICHG
for different values of t
ICHGR
and
Figure 22
shows a
plot of C
ICHG
versus t
ICHGR
.
To calculate the value of the C
ICHG
capacitor we use the
following equation:
C
ICHG
(nF) = 1000
*
t
ICHGR
(ms) / [ 3
*
R
ICHG
(k
)
I
CHG
(A)
R
ICHG
(k
)
0.05
15.35
0.1
32.10
0.15
48.85
0.2
65.60
0.25
82.35
0.3
99.10
0.35
115.85
0.4
135.60
0.45
149.35
0.5
166.10
Table 8. C
ICHG
Values for Some Desired t
CHGR
Values
at a Specific I
CHG
Value
t
ICHGR
(ms)
C
ICHG
(nF)
I
CHG
= 0.05 A
C
ICHG
(nF)
I
CHG
= 0.1 A
C
ICHG
(nF)
I
CHG
= 0.5 A
1.0
21.72
10.38
2.01
2.0
43.43
20.77
4.01
3.0
65.15
31.15
6.02
4.0
86.86
41.54
8.03
5.0
108.58
51.92
10.03
6.0
130.29
62.31
12.04
7.0
152.01
72.69
14.05
8.0
173.72
83.07
16.05
9.0
195.44
93.46
18.06
10
217.16
103.84
20.07
0
20
40
60
80
100
120
140
160
180
0
0.1
0.2
0.3
0.4
0.5
0.6
ICHG (A)
R
I
)
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MCZ34652EFR2 | 功能描述:熱插拔功率分布 Hot Swap Controllor 2.0 Neg Vltg RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MCZ34652EFR2SCALE | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:2.0 A Negative Voltage Hot Swap Controller with Enhanced Programmability |
| MCZ34653EF | 功能描述:熱插拔功率分布 Hot Swap Controller 1.0 Neg Vltg RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MCZ34653EF/R2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:1.0 A Negative Voltage Hot Swap Controller |
| MCZ34653EFR2 | 功能描述:熱插拔功率分布 Hot Swap Controller 1.0 Neg Vltg RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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