參數(shù)資料
型號(hào)： L6585DETR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： POWER FACTOR CONTROLLER, PDSO20
封裝： ROHS COMPLIANT, SOP-20
文件頁(yè)數(shù)： 9/33頁(yè)
文件大?。?/td> 2064K
代理商： L6585DETR
L6585DE
Application information
17/33
5.2.4
Over-voltage protection
Two different over-voltage protections can be detected: dynamic over-voltage, usually due to
fast load transition and static over-voltage, due to an excessive input voltage.
●
Dynamic OVP
The CTR pin is connected to high voltage rail through a voltage divider. If the voltage at
this pin is above 3.4 V, the PFC gate driver is stopped until the voltage returns below
the threshold. This limits the risk of choke saturation and MOSFET's damage.
●
Static OVP
A steady over-voltage may cause abnormal behavior in both the PFC (e.g. because
input voltage is higher than PFC output voltage) and the ballast (e.g. overheating, lamp
over-current, capacitive mode operating point). A steady over-voltage causes a slow
transition of the COMP pin towards the low saturation (around 2.25 V). This fact is
considered by the L6585DE as a static over-voltage event and a Tch cycle is started.
After this cycle, if the COMP pin is saturated low the IC is latched in low consumption
mode.
5.2.5
Disabling the L6585DE
the CTR pin can be used to shut down the IC without mains disconnection. When CTR is
pulled below 0.75 V, the IC is stopped and the internal logic is reset. When CTR is released,
the IC starts with a new preheating sequence. This function is available only if the IC is not
latched due to a fault protection intervention.
5.2.6
Feedback disconnection protection
Very fast output voltage surges may damage the upper resistors of the voltage divider
feeding the INV pin, causing a feedback disconnection. In this case, the E/A saturates high
and the PFC gate drive turns on the MOSFET for a long time (the current sense threshold
assumes its maximum value equal to 1 V) and the choke may saturate, destroying the
MOSFET.
The output voltage increases very fast and may reach very high value even if OVP is
triggered.
Feedback disconnection protection is then activated if VINV < 1.2 V and dynamic over-
voltage protection is triggered.
5.2.7
PFC over-current protection
The PFC MOSFET over-current can occur in cases of PFC choke saturation or in cases of
surge from the input, due to the breakdown of the MOSFET body diode. The latter case is
observed together with an over-voltage of the PFC output.
In both cases, the PFC stage is stopped, whereas the HB stage continues switching. The
protection is not latched: once the PFCCS falls below 1.7 V, the PFC driver restarts.
相關(guān)PDF資料
PDF描述
L6598 SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDIP16
L6598D013TR SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO16
L6710 2 A SWITCHING CONTROLLER, PQFP44
L6710TR 2 A SWITCHING CONTROLLER, PQFP44
L6713ATR 2 A SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, PQFP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6585DTR 功能描述:DC/DC 開關(guān)控制器 Combo IC RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
L6590 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:FULLY INTEGRATED POWER SUPPLY FIPS
L6590A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FULLY INTEGRATED POWER SUPPLY
L6590AN 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 700 Volt Monolithic RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6590D 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 700 Volt Monolithic RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*