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参数资料
| 型号： | LTC4252A-2CMS#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: 0°C to +70°C |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封装： | LEAD FREE, PLASTIC, MSOP-10 |
| 文件页数： | 25/36页 |
| 文件大小： | 394K |
| 代理商： | LTC4252A-2CMS#PBF |
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LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
31
425212fb
At power-up, Q5 and Q8 are held off low by the SS pin of
the LTC4252; resistors R5 and R8 pull the SENSE pin
closed to VEE. VEE is connected to the power supply with
lower voltage through the body diodes Q2 or Q3 until Q2
or Q3 is turned on. This allows the LTC4252 to perform a
start-up cycle and ramp up the SS and GATE voltage.
As the SS voltage ramps up to 2.2V, it turns on Q5 and Q8
and pulls TIMER low through Q6 and Q9. The sense
voltage rises as current flows into R5 and R8 through
APPLICATIO S I FOR ATIO
WU
U
resistors R3 and R6. The ACL amplifier of the LTC4252
servos the sense voltage to about 100mV as the GATE
voltage regulates Q2 and Q3. Current flows into R4, Q4 and
R7, Q7 as Q2 and Q3 turn on. The respective node voltages
at the R3 and R4 connection and the R6 and R7 connection
are always kept equal to their respective sense voltages by
the Q4 and Q2 VDS drop and the Q7 and Q3 VDS drop
assuming the Q5 and Q8 VDS drop is negligible.
4252-1/2 F20
UV
OV
VEE
VIN
SENSE
SS
TIMER
GATE
PWRGD
DRAIN
LTC4252A-1
R1
390k
1%
R2
30.1k
1%
CT
0.68
F
CSS
68nF
CC
10nF
–48V
RS
0.02
R4
38.3k
Q1
IRF530S
VOUT
RC
10
R3
5.1k
RIN
3
× 1.8k
1/4W EACH
1
9
8
10
3
2
7
6
4
5
C1
10nF
CIN
1
F
CL
100
F
–48V RTN
(SHORT PIN)
–48V RTN
(LONG PIN)
RD 1M
R5 27
LOAD
EN
*
*MOC207
+
Figure 20. Circuit Breaker with Foldback Current Limit Application
4252-1/2 F21
UV
OV
VEE
VIN
SENSE
SS
TIMER
GATE
PWRGD
DRAIN
LTC4252A-1
R1
390k
1%
R2
30.1k
1%
CT
0.68
F
CSS
68nF
C3
330nF
25V
C2
10nF
100V
–48V
R4
1k
1%
Q1
IRF530S
VOUT
R3
5.1k
RIN
3
× 1.8k
1/4W EACH
1
9
8
10
3
2
7
6
4
5
C1
10nF
CIN
1
F
CL
100
F
–48V RTN
(SHORT PIN)
–48V RTN
(LONG PIN)
RD 1M
LOAD
EN
*
*MOC207
+
Figure 21. Inrush Control Without a Sense Resistor Application
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4252A-2CMS#TRPBF | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: 0°C to +70°C |
| LTC4252A-2IMS#PBF | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: -40°C to +85°C |
| LTC4252A-2IMS#TRPBF | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: -40°C to +85°C |
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| LTC4252-2CMS8#TRPBF | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 8; Temperature Range: 0°C to +70°C |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4252A-2CMSTR | 制造商:LINER 制造商全称:Linear Technology 功能描述:Negative Voltage Hot Swap Controllers |
| LTC4252A-2CMSTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Negative Voltage Hot Swap Controllers |
| LTC4252A-2IMS | 功能描述:IC CTRLR HOTSWAP NEG VOLT 10MSOP 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 |
| LTC4252A-2IMS#PBF | 功能描述:IC CNTRLR HOTSWAP NEGVOLT 10MSOP RoHS:是 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 |
| LTC4252A-2IMS#TR | 功能描述:IC CTRLR HOTSWAP NEG VOLT 10MSOP 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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