- 您现在的位置：买卖IC网 > PDF目录19707 > MC34652EFR2 (Freescale Semiconductor)IC CTRLR HOT SWAP NEG V 16-SOIC PDF资料下载
参数资料
| 型号： | MC34652EFR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 21/26页 |
| 文件大小： | 1802K |
| 描述： | IC CTRLR HOT SWAP NEG V 16-SOIC |
| 标准包装： | 2,500 |
| 类型： | 热交换开关 |
| 应用： | 通用 |
| 内部开关： | 是 |
| 电流限制： | 2A |
| 电源电压： | 15 V ~ 80 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC N |
| 包装： | 带卷 (TR) |
Analog Integrated Circuit Device Data
Freescale Semiconductor
21
34652
TYPICAL APPLICATIONS
rchived by Freescale Semiconductor, Inc., 2008
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?/DIV>
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?/SPAN>)
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
ICHGR
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)
I
CHG
(A)
相关PDF资料 |
PDF描述 |
|---|---|
| CR2450 | BATTERY LITHIUM COIN 3V CELL |
| VI-243-CY-F4 | CONVERTER MOD DC/DC 24V 50W |
| V48A3V3E264BG3 | CONVERTER MOD DC/DC 3.3V 264W |
| VI-243-CY-F3 | CONVERTER MOD DC/DC 24V 50W |
| PAF600F280-28/T | DC-DC CONVERTR 28VDC 602W 21.5A |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC34653 | 制造商:SPC Multicomp 功能描述:HEADER R/A SQ PIN 2.54MM 10WAY 制造商:SPC Multicomp 功能描述:HEADER, R/A, SQ PIN, 2.54MM, 10WAY 制造商:SPC Multicomp 功能描述:WIRE-BOARD CONN, HEADER, 10POS, 2.54MM; Connector Type:Wire to Board; Series:2217; Contact Termination:Through Hole Right Angle; Gender:Header; No. of Contacts:10; No. of Rows:1; Pitch Spacing:2.54mm; Contact Plating:Tin ;RoHS Compliant: Yes |
| MC34653EF | 功能描述:热插拔功率分布 1A 8-LD NVHS 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 |
| MC34653EFR2 | 功能描述:热插拔功率分布 1A 8-LD NVHS 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 |
| MC34655 | 制造商:SPC Multicomp 功能描述:HEADER SQUARE PIN 2.54MM 5WAY 制造商:SPC Multicomp 功能描述:HEADER, SQUARE PIN, 2.54MM, 5WAY 制造商:SPC Multicomp 功能描述:WIRE-BOARD CONNECTOR HEADER 5POS, 2.54MM; Connector Type:Wire to Board; Series:2217; Contact Termination:Through Hole Vertical; Gender:Header; No. of Contacts:5; No. of Rows:1; Pitch Spacing:2.54mm; Contact Plating:Tin ;RoHS Compliant: Yes |
| MC34657 | 制造商:SPC Multicomp 功能描述:HEADER VERTICAL 2WAY 制造商:SPC Multicomp 功能描述:HEADER, VERTICAL, 2WAY 制造商:SPC Multicomp 功能描述:WIRE-BOARD CONNECTOR, RCPT, 2POS, 4.2MM; Series:2266(5566)S; Pitch Spacing:4.2mm; Contact Termination:Through Hole Vertical; No. of Contacts:2; No. of Rows:2; Connector Mounting:PCB; Gender:Receptacle; Contact Material:Copper Alloy ;RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。