- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44996 > LTC4215IUFD-3#PBF (LINEAR TECHNOLOGY CORP) 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC24 PDF資料下載
參數(shù)資料
| 型號： | LTC4215IUFD-3#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC24 |
| 封裝： | 4 X 5 MM, LEAD FREE, PLASTIC, MO-220, QFN-24 |
| 文件頁數(shù)： | 6/28頁 |
| 文件大小： | 307K |
| 代理商： | LTC4215IUFD-3#PBF |
第1頁第2頁第3頁第4頁第5頁當前第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
LTC4215-1/LTC4215-3
14
421513fc
(OV pin), input undervoltage (UV pin), overcurrent circuit
breaker (SENSE– pin), or EN transitioning high. Writing
a logic one into the UV, OV or OC fault bits (D0-D2 in
Table 5) also latches off the GATE if their auto-retry bits
are set to false.
Normally the MOSFET is turned off with a 1mA current
pulling down the GATE pin to ground. With the MOSFET
turned off, the SOURCE and FB voltages drop as CL dis-
charges. When the FB voltage crosses below its threshold,
GPIO1 may be congured to pull low to indicate that the
output power is no longer good.
If the VDD pin falls below 2.74V for greater than 2μs or
INTVCC drops below 2.60V for greater than 1μs, a fast shut
down of the MOSFET is initiated. The GATE pin is pulled
down with a 450mA current to the SOURCE pin.
Overcurrent Fault
The LTC4215-1/LTC4215-3 feature an adjustable current
limit that protects against short circuits or excessive load
current. An overcurrent fault occurs when the circuit
breaker 25mV threshold has been exceeded for longer than
the 20μs (LTC4215-1) or 420μs (LTC4215-3) time-out delay.
Current limiting begins immediately when the current sense
voltage between the VDD and SENSE pins reaches 75mV.
The GATE pin is then brought down and regulated in order
to limit the current sense voltage to 75mV. When the 20μs
(LTC4215-1) or 420μs (LTC4215-3) circuit breaker time
out has expired, the external MOSFET is turned off and the
overcurrent fault bit D2 is set.
After the MOSFET is turned off, the TIMER capacitor
begins discharging with a 2μA pull-down current. When
the TIMER pin reaches its 0.2V threshold the MOSFET is
allowed to turn on again if the overcurrent fault has been
cleared. However, if the overcurrent auto-retry bit, A2 has
been set then the MOSFET turns on again automatically
without resetting the overcurrent fault. Use a minimum
value of 10nF for CT. If the TIMER pin is bypassed by tying
it to INTVCC, the part is allowed to turn on again after an
internal 5 second timer has expired, in the same manner
as the TIMER pin passing its 0.2V threshold.
Overvoltage Fault
An overvoltage fault occurs when either the OV pin rises
above its 1.235V threshold, or the VDD pin rises above its
15.6V threshold, for more than 2μs. This shuts off the GATE
with a 1mA current to ground and sets the overvoltage
present bit C0 and the overvoltage fault bit D0. If the pin
subsequently falls back below the threshold for 100ms,
the GATE is allowed to turn on again unless overvoltage
auto-retry has been disabled by clearing bit A0.
Undervoltage Fault
An undervoltage fault occurs when the UV pin falls below
its 1.235V threshold for more than 2μs. This turns off the
GATE with a 1mA current to ground and sets undervoltage
present bit C1 and undervoltage fault bit D1. If the UV pin
subsequently rises above the threshold for 100ms, the
GATE is turned on again unless undervoltage auto-retry
has been disabled by clearing bit A1. When power is ap-
plied to the device, if UV is below its 1.235V threshold after
INTVCC crosses its 2.64V undervoltage lockout threshold,
an undervoltage fault is logged in the fault register.
Figure 3. Short-Circuit Waveforms
APPLICATIONS INFORMATION
VGATE
10V/DIV
VSOURCE
10V/DIV
VDD
10V/DIV
ILOAD
10A/DIV
5μs/DIV
4215 F03
RS = 5mΩ
CL = 0
RSHORT = 1Ω
R6 = 30k
C1 = 0.1μF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC4222CG#PBF | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO36 |
| LTC4222CG#TRPBF | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO36 |
| LTC4222IUH#TRPBF | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| LTC4222IUH#PBF | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| LTC4227CGN-2#TRPBF | POWER SUPPLY MANAGEMENT CKT, PDSO16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4216 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Hot Swap Controller |
| LTC4216CDE | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 6V 12-Pin DFN EP |
| LTC4216CDE#PBF | 功能描述:IC CTLR HOT SWAP 12-DFN 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(yīng)用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 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(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC4216CDE#TR | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 6V 12-Pin DFN EP T/R |
| LTC4216CDE#TRPBF | 功能描述:IC CNTRLR HOT SWAP 12-DFN 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(yīng)用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 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(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。