參數(shù)資料
型號(hào)： LTC3766HUFD#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 316 kHz SWITCHING FREQ-MAX, PQCC28
封裝： 4 X 5 MM, LEAD FREE, PLASTIC, MO-220, QFN-28
文件頁(yè)數(shù)： 10/60頁(yè)
文件大小： 607K
代理商： LTC3766HUFD#TRPBF
LTC3766
18
3766f
OPERATION
turn on the synchronous MOSFET. This has the effect of
pulling down the output voltage to protect the load from
potential damage. Overvoltage protection is not latched,
and normal operation is restored when the output voltage
has been reduced to within 15% of its regulation level.
Third, the LTC3766 contains an adjustable synchronous
MOSFET reverse overcurrent. This is accomplished by
monitoringtheSWvoltagewhenthesynchronousMOSFET
is on (SG pin is high). If the voltage on SW exceeds a
pre-determinedthreshold,thenthesynchronousMOSFET
will be turned off, protecting it from potentially damaging
current levels. This SW threshold for reverse overcurrent
detection can be reduced by placing a resistor in series
with the SW pin, which sources a current when the SG
pin is high. Note that the SG reverse overcurrent thresh-
old and the SW pin source current are adjusted based on
the state of the MODE pin. This is done to accommodate
the use of either high voltage or low voltage MOSFETs,
which normally have significantly different on resistances.
In an overvoltage condition, the SG reverse overcurrent
will override the overvoltage protection and force SG low,
essentially regulating the reverse SG MOSFET current
at a high level while the overvoltage condition persists.
However, the SG reverse overcurrent is only active after
the LTC3766 has achieved communication lock.
Finally, the REGSD pin can be used to limit the amount
of time that the high voltage linear regulator controller
is active. This is particularly useful when the LTC3766 is
used standalone in a nonisolated forward converter. In
this application, the pass device of the linear regulator
controller may be dissipating considerable power. When
the linear regulator controller is active, the REGSD pin
sources a 13μA current. If a capacitor from REGSD to
GND charges to a voltage greater than 1.21V, then linear
regulator controller is disabled.
Gate Driver Mode Control
In addition to being used in conjunction with the LTC3765,
the LTC3766 can also be used standalone in a nonisolated
forward converter application. In this case, the MODE pin
can be used to disable gate drive encoding by tying MODE
to GND through either a 100k (for VCC = 7V operation)
or 50k (for VCC = 8.5V operation) resistor. This causes
a normal PWM signal to appear on PT+ and a reference
clock to appear on PT–.
相關(guān)PDF資料
PDF描述
LTC3766IUFD#TRPBF SWITCHING CONTROLLER, 316 kHz SWITCHING FREQ-MAX, PQCC28
LTC3766MPUFD#TRPBF SWITCHING CONTROLLER, 316 kHz SWITCHING FREQ-MAX, PQCC28
LTC3766IGN#TRPBF SWITCHING CONTROLLER, 316 kHz SWITCHING FREQ-MAX, PDSO28
LTC3766MPUFD#PBF SWITCHING CONTROLLER, 316 kHz SWITCHING FREQ-MAX, PQCC28
LTC3766EUFD#PBF SWITCHING CONTROLLER, 316 kHz SWITCHING FREQ-MAX, PQCC28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3766IGN#PBF 功能描述:IC CONTROLLER SYNCH 28SSOP RoHS:是 類(lèi)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(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
LTC3766IGN#TRPBF 功能描述:IC CONTROLLER SYNCH 28SSOP RoHS:是 類(lèi)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(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
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LTC3766IUFD#TRPBF 功能描述:IC CONTROLLER SYNCH 28QFN RoHS:是 類(lèi)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(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
LTC3766MPGN#PBF 功能描述:IC CONTROLLER SYNCH 28SSOP RoHS:是 類(lèi)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(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
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