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參數(shù)資料
| 型號： | LTC3765IMSE#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件頁數(shù)： | 3/24頁 |
| 文件大?。?/td> | 265K |
| 代理商： | LTC3765IMSE#TRPBF |
LTC3765
11
3765f
OPERATION
core by a resistor from the RCORE pin to ground. The mag-
netizing current is then limited during the on-time by this
accurateinternalapproximation.Unlikepreviousmethods,
the Direct Flux Limit directly measures and monitors flux
accumulation and guarantees that the transformer will
not saturate, even when starting into a pre-biased output,
without compromising transient response.
Additional Protection Features
The LTC3765 contains additional features to protect the
circuit in the event of a persistent abnormal condition.
Overcurrentandovertemperaturemonitorsensurereliable
operation even in abnormal conditions.
The overcurrent monitor is implemented with an external
sense resistor in series with the source of the primary
NMOS. When the differential voltage between the current-
sensepins,IS+andIS–,exceeds150mV,theprimaryNMOS
is immediately turned off and a fault is initiated.
The internal overtemperature monitor is set at 165°C,
with 20°C of hysteresis. This is helpful for limiting the
temperature of the DC/DC converter in the event of a
failure or abnormal condition. If the internal temperature
exceeds this level, switching immediately stops and a
fault is flagged.
Fault Indicator
A fault is initiated when any of the following conditions
are encountered: overcurrent trip, overtemperature trip,
communication loss with the LTC3766, VCC falling below
its UVLO threshold, or the RUN pin falling below its
threshold. The SSFLT pin is used to indicate these faults,
to communicate the fault in a polyphase system, and to
optionally lockout on a fault.
When a fault occurs, switching stops immediately and the
SSFLT pin is rapidly pulled up to above 6V as an indicator.
The LTC3766 will detect that switching has stopped and
will also fault and restart. As soon as the fault clears, the
voltageontheSSFLTpinwillslowlydischargetoallowtime
for the LTC3766 to prepare for a restart. When the SSFLT
voltage reaches 0.7V, the pin is momentarily grounded,
and the soft-start sequence begins again. A fault can
optionally be “l(fā)ocked out” by adding a 5.6V Zener diode
from SSFLT to ground. This will inhibit the restart until
the SSFLT pin is externally grounded, the diode clamp is
removed, or the input supply collapses.
InaPolyPhaseapplication,theSSFLTpinsoftheLTC3765s
should all be tied together. This not only ensures that all of
the LTC3765 phases begin their open-loop start-up simul-
taneously, but also provides a means for communicating
a fault condition. If one LTC3765 detects a fault, it pulls
the combined SSFLT node to above 6V. When the voltage
rises above 5V, the other LTC3765s detect this and stop
switching until the common SSFLT pin has discharged.
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| LTC3765MPMSE#PBF | 功能描述:IC CONTROLLER GATE DR 16MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:Direct Flux Limit™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| LTC3765MPMSE#TRPBF | 功能描述:IC CONTROLLER GATE DR 16MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:Direct Flux Limit™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| LTC3766EGN#PBF | 功能描述:IC CONTROLLER SYNCH 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:Direct Flux Limit™, PolyPhase® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| LTC3766EGN#TRPBF | 功能描述:IC CONTROLLER SYNCH 28SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:Direct Flux Limit™, PolyPhase® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| LTC3766EUFD#PBF | 功能描述:IC CONTROLLER SYNCH 28QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:Direct Flux Limit™, PolyPhase® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
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