- 您现在的位置：买卖IC网 > PDF目录19743 > TPS2346PW (Texas Instruments)IC HOT SWAP POWER MGR 24-TSSOP PDF资料下载
参数资料
| 型号： | TPS2346PW |
| 厂商： | Texas Instruments |
| 文件页数： | 24/30页 |
| 文件大小： | 490K |
| 描述： | IC HOT SWAP POWER MGR 24-TSSOP |
| 标准包装： | 60 |
| 类型： | 热交换控制器 |
| 应用： | 光纤学网络（ONET） |
| 内部开关： | 无 |
| 电源电压： | -5.2V，3.3V，5V，5.15V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 24-TSSOP |
| 包装： | 管件 |
| 其它名称： | 296-12956-5 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页当前第24页第25页第26页第27页第28页第29页第30页
TPS2346
SLUS529 MAY 2002
24
www.ti.com
APPLICATION INFORMATION
To complete the design of the power interface for the plugin shown in the typical application diagram, assume
that a maximum slew rate of 1.5 A/ms is specified for each of the three positive-voltage loads. A value for
capacitor C2 must still be determined. Inspection of equation (4) indicates that, given the same di/dt requirement
on all supplies, the supply channel(s) with the lowest-value sense resistor dictates the minimum value for the
IRAMP capacitor. Therefore, the 5-V and 3.3-V supplies are suggested in this case for obtaining an initial
estimate for C
IRAMP
. Using the associated values, equation (4) produces the result shown in equation (5).
C
IRAMP2,3
+
68
67.5
(
0.002 W
)
1500 As
^ 0.336 mF
A value of 0.33 礔 can be used, or the next available standard value of 0.39 礔 provides some margin for
capacitor and sense-resistor tolerances. In either case, equation (4) can be rewritten as equation (6), which is
used here to verify that the 5.15-V slew rate is still within specification.
didt
x
+
68
67.5 R
SNSx
C
IRAMPx
where:
R
SNSx
is in ohms,
C
IRAMPx
is the value suggested by equation (5) in microfarads, and
(di/dt)
x
is given in amps/second.
For a C
IRAMP
of 0.39 礔, the maximum di/dt for the 5.15-V supply is approximately 860 mA/ms which is well
within the example requirement.
protection against faulted loads
The TPS2346 allows the time period of one IRAMP pulse for each back-end planes voltage to ramp-up to its
minimum level. After this delay period, the device latches off if an undervoltage fault is subsequently detected.
This nominal delay time, t
TIMER
, is set by the constant-current charging and subsequent discharging of C
IRAMP
,
and is therefore determined from equation (7).
t
TIMER
+ C
IRAMP
1.4
1
58
)
1
1.8
where:
C
IRAMP
is in microfarads.
The resultant fault timer period should be sufficient for most applications; however, it is good design practice
to verify that the delay is long enough for each load.
(5)
(6)
(7)
相关PDF资料 |
PDF描述 |
|---|---|
| HSC31DRYH-S734 | CONN EDGECARD 62POS DIP .100 SLD |
| P-150SCS/A02 | BATTERY 1500MAH 1.2V SC NICAD |
| MIC29310-5.0BT | IC REG LDO 5V 3A TO-220-3 |
| LC5256MB-5F256I | IC XPLD 256MC 5NS 256FPBGA |
| GRM32NR72A823KA01L | CAP CER 0.082UF 100V X7R 1210 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2346PWR | 功能描述:热插拔功率分布 Optical Network Hot Swap Controller 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 |
| TPS2346PWRG4 | 功能描述:热插拔功率分布 Optical Network Hot Swap Controller 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 |
| TPS2350D | 功能描述:热插拔功率分布 Pwr Mngr for Redund -48V Supplies 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 |
| TPS2350DG4 | 功能描述:热插拔功率分布 Pwr Mngr for Redund -48V Supplies 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 |
| TPS2350DR | 功能描述:热插拔功率分布 Pwr Mngr for Redund -48V Supplies 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 |
发布紧急采购，3分钟左右您将得到回复。