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參數資料
| 型號： | LTC4251IS6 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | 1 MM HEIGHT, PLASTIC, MO-193, TSOT-23, 6 PIN |
| 文件頁數： | 9/20頁 |
| 文件大小： | 235K |
| 代理商： | LTC4251IS6 |
LTC4251/LTC4251-1/
LTC4251-2
17
425112fa
APPLICATIO S I FOR ATIO
WU
UU
Figure 9. Undervoltage Lockout Timing (All Waveforms are Referenced to VEE)
Figure 10. Undervoltage Timing with an Overvoltage Glitch (All Waveforms are Referenced to VEE)
13
24
5 6
7 8 9
VUV/0V CLEARS VUVHI, CHECK TIMER < VTMRL, GATE < VGATEL AND SENSE < VCB.
VUV/0V DROPS BELOW VUVLO. TIMER, GATE, AND SENSE ARE PULLED TO VEE.
TIMER CLEARS VTMRL, CHECK GATE < VGATEL AND SENSE < VCB.
VUVHI
VUVLO
VTMRH
VTMRL
VACL
VCB
5.8
A
230
A
58
A
58
A
5.8
A
5.8
A
INITIAL TIMING CYCLE
START-UP CYCLE
425112 F09
UV/0V
TIMER
GATE
SENSE
13
24 5
6 7
8 9
VUV/0V DROPS BELOW VOVLO AND TIMER RESTARTS INITIAL TIMING CYCLE.
VUV/0V CLEARS VUVHI. CHECK TIMER < VTMRL, GATE < VGATEL AND SENSE < VCB.
VUV/0V OVERSHOOTS VOVHI AND TIMER ABORTS INITIAL TIMING CYCLE.
TIMER CLEARS VTMRL, CHECK GATE < VGATEL AND SENSE < VCB.
VOVHI
VUVHI
VOVLO
VTMRH
VTMRL
VACL
VCB
5.8
A
230
A
58
A
58
A
5.8
A
5.8
A
INITIAL TIMING CYCLE
START-UP CYCLE
425112 F10
UV/0V
TIMER
GATE
SENSE
10
SENSE pin is less than VCB. In Figure 12b, when TIMER
exceeds VTMRH, TIMER is latched high by the 5.8A pull-
up and GATE pulls down immediately. In Figure 12c,
multiple momentary faults cause the TIMER capacitor to
integrate until it latches.
Analog Current Limit and Fast Current Limit
In Figure 13a, when SENSE exceeds VACL, GATE is regu-
lated by the analog current limit amplifier loop. When
SENSE drops below VACL, GATE is allowed to pull up. In
Figure 13b, when a severe fault occurs, SENSE exceeds
VFCL and GATE immediately pulls down until the analog
current amplifier can establish control. If TIMER reaches
VTMRH, 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 VUVLO or pulling TIMER below VTMRL.
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.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC4251IS6#PBF | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 6-Pin TSOT-23 |
| LTC4251IS6#TR | 功能描述:IC CTRLR HOTSWAP NEGVOLT SOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內部開關:無 電流限制:可調 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:10-MSOP 包裝:管件 |
| LTC4251IS6#TRM | 功能描述:IC CNTRLR HOTSWAP NEGVOLT SOT236 RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內部開關:無 電流限制:可調 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:10-MSOP 包裝:管件 |
| LTC4251IS6#TRMPBF | 功能描述:IC CTRLR HOTSWAP NEGVOLT SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內部開關:無 電流限制:可調 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:10-MSOP 包裝:管件 |
| LTC4251IS6#TRPBF | 功能描述:IC CTRLR HOTSWAP NEGVOLT SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內部開關:無 電流限制:可調 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:10-MSOP 包裝:管件 |
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