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参数资料
| 型号： | LTC4251-2IS6#TRM |
| 厂商： | Linear Technology |
| 文件页数： | 18/24页 |
| 文件大小： | 266K |
| 描述： | IC CTRLR HOTSWP NEG VOLT SOT23-6 |
| 标准包装： | 500 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | -43V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 细型，TSOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 带卷 (TR) |
| 其它名称： | LTC4251-2IS6 LTC4251-2IS6-ND |
18
425112fd
LTC4251/LTC4251-1/
LTC4251-2
For more information www.linear.com/4251
APPLICATIONS INFORMATION
Analog Current Limit and Fast Current Limit
In Figure 13a, when SENSE exceeds V
ACL
, GATE is regulated
by the analog current limit amplifier loop. When SENSE
drops below V
ACL
, GATE is allowed to pull up. In Figure
13b, when a severe fault occurs, SENSE exceeds V
FCL
and GATE immediately pulls down until the analog current
amplifier can establish control. If TIMER reaches V
TMRH
,
GATE pulls low and latches off.
Resetting a Fault Latch
As shown in Figure 14, a latched fault is reset by either
pulling UV/OV below V
UVLO
or pulling TIMER below V
TMRL
.
An initial timing cycle is initiated if UV/OV is used for reset.
If TIMER is used for reset, the initial timing cycle is skipped.
Internal Soft-Start
An internal soft-start feature ramps the positive input of
the analog current limit amplifier during initial start-up.
The ramp duration is approximately 200祍. This feature
reduces load current dl/dt at start-up. As illustrated in
Figure?5, soft-start is initiated by a TIMER transition from
V
TMRH
to V
TMRL
or when UV/OV falls below the V
OVLO
threshold after an OV fault. After soft-start duration, load
current is limited by V
ACL
/R
S
.
Figure 9. Undervoltage Lockout Timing (All Waveforms are Referenced to V
EE
)
1
3
2
4 5 6
7 8 9
V
UV/0V
CLEARS V
UVHI
, CHECK TIMER < V
TMRL
, GATE < V
GATEL
AND SENSE < V
CB
.
V
UV/0V
DROPS BELOW V
UVLO
. TIMER, GATE, AND SENSE ARE PULLED TO V
EE
.
TIMER CLEARS V
TMRL
, CHECK GATE < V
GATEL
AND SENSE < V
CB
.
V
UVHI
V
UVLO
V
TMRH
V
TMRL
V
ACL
V
CB
5.8礎
230礎
58礎
58礎
5.8礎
5.8礎
INITIAL TIMING CYCLE
START-UP CYCLE
425112 F09
UV/0V
TIMER
GATE
SENSE
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4251BCS6#TRMPBF | 功能描述:IC HOT SWAP CONTROLLER 6SOT23 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 |
| LTC4251BCS6#TRMPBF | 制造商:Linear Technology 功能描述:HOT SWAP CONTROLLER -48V SOT23-6 |
| LTC4251BCS6#TRPBF | 功能描述:IC HOT SWAP CONTROLLER 6SOT23 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 |
| LTC4251BCS6-1#TRMPBF | 功能描述:IC HOT SWAP CONTROLLER 6SOT23 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 |
| LTC4251BCS6-1#TRMPBF | 制造商:Linear Technology 功能描述:HOT SWAP CONTROLLER -48V SOT23-6 |
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