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参数资料
| 型号： | LTC4253AIGN#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | -48V Hot Swap Controller with Sequencer; Package: SSOP; No of Pins: 16; Temperature Range: -40°C to +85°C |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-16 |
| 文件页数： | 7/34页 |
| 文件大小： | 369K |
| 代理商： | LTC4253AIGN#PBF |
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LTC4253/LTC4253A
15
425353afd
applicaTions inForMaTion
An OV hysteretic comparator detects overvoltage condi-
tions at the OV pin, with the following thresholds:
OV low-to-high (VOVHI) = 6.150V
OV high-to-low (VOVLO) = 5.850V
The UV and OV trip point ratio is designed to match the
standard telecom operating range of 43V to 82V when
connectedtogetherasintheTypicalApplication.Aresistive
divider is used to scale the supply voltage. Using 402k and
32.4k gives a typical operating range of 43.2V to 82.5V.
The undervoltage shutdown and overvoltage recovery
thresholds are then 39.2V and 78.4V. 1% divider resistors
are recommended to preserve threshold accuracy.
The resistive divider values shown set a standing current
of slightly more than 100A and define an impedance at
UV/OV of 30kΩ. In most applications, 30kΩ impedance
coupled with 300mV UV hysteresis make the LTC4253
insensitive to noise. If more noise immunity is desired,
add a 1nF to 10nF filter capacitor from UV/OV to VEE.
pulse. To protect VIN against damage from higher am-
plitude spikes, clamp VIN to VEE with a 13V Zener diode.
Star connect VEE and all VEE-referred components to the
sense resistor Kelvin terminal as illustrated in Figure 3,
keeping trace lengths between VIN, CIN, DIN and VEE as
short as possible.
INTERNAL UNDERVOLTAGE LOCKOUT (UVLO)
Ahystereticcomparator,UVLO,monitorsVINforundervolt-
age. The thresholds are defined by VLKO and its hysteresis
VLKH. When VIN rises above VLKO, the chip is enabled;
below (VLKO – VLKH), it is disabled and GATE is pulled low.
The UVLO function at VIN should not be confused with the
UV and OV pins. These are completely separate functions.
UV/OV COMPARATORS (LTC4253)
A UV hysteretic comparator detects undervoltage condi-
tions at the UV pin, with the following thresholds:
UV low-to-high (VUVHI) = 3.225V
UV high-to-low (VUVLO) = 2.925V
Figure 3. –48V/2.5A Application for the LTC4253A
(Refer to Block Diagram)
R5
2.2k
R4
2.2k
R6
2.2k
PWRGD1
VIN
VEE
LTC4253A
POWER
MODULE 1
PWRGD2
PWRGD3
EN3
EN2
UV
OV
RESET
DRAIN
SS
GATE
SQTIMER
SENSE
TIMER
EN
POWER
MODULE 2
EN
POWER
MODULE 3
EN
RIN
10k
20k(1/4W)/2
PUSH
RESET
EN3
4253 F03
EN2
RC
10
RD 1M
RS
0.02
Q1
IRF530S
Q2
FZT857
VIN1
CC
10nF
CT
0.68F
C1
10nF
CSQ
0.1F
CSS 33nF
R7
POWER
MODULE 1
OUTPUT
POWER
MODULE 2
OUTPUT
VIN1
R8
+
CL
100F
CIN
1F
R1
30.1k
1%
R2
392k
1%
R9
47k
R3 22k
VIN1
–48V RTN
(SHORT PIN)
–48V RTN
(LONG PIN)
–48V
(LONG PIN)
DIN
DDZ13B*
*DIODES, INC.
MOC207
RECOMMENDED FOR HARSH ENVIRONMENTS.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4253AIGN#TRPBF | -48V Hot Swap Controller with Sequencer; Package: SSOP; No of Pins: 16; Temperature Range: -40°C to +85°C |
| LTC4253CGN#PBF | -48V Hot Swap Controller with Sequencer; Package: SSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| LTC4253CGN#TRPBF | -48V Hot Swap Controller with Sequencer; Package: SSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| LTC4253IGN#PBF | -48V Hot Swap Controller with Sequencer; Package: SSOP; No of Pins: 16; Temperature Range: -40°C to +85°C |
| LTC4253IGN#TRPBF | -48V Hot Swap Controller with Sequencer; Package: SSOP; No of Pins: 16; Temperature Range: -40°C to +85°C |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4253BCGN#PBF | 功能描述:IC HOT SWAP CONTROLLER 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 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:管件 |
| LTC4253BCGN#PBF | 制造商:Linear Technology 功能描述:HOT SWAP CONTROLLER -48V SSOP-16 |
| LTC4253BCGN#TRPBF | 功能描述:IC HOT SWAP CONTROLLER 16SSOP 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 |
| LTC4253BIGN#PBF | 功能描述:IC HOT SWAP CONTROLLER 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 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:管件 |
| LTC4253BIGN#PBF | 制造商:Linear Technology 功能描述:HOT SWAP CONTROLLER -48V SSOP-16 |
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