參數(shù)資料
型號(hào)： L6563STR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： POWER FACTOR CONTROLLER, PDSO14
封裝： ROHS COMPLIANT, SOP-14
文件頁(yè)數(shù)： 27/42頁(yè)
文件大?。?/td> 1230K
代理商： L6563STR
L6563S
Application information
Doc ID 16116 Rev 3
33/42
Figure 46.
Interface circuits for actual power-up sequencing (master PFC)
Another possible use of the RUN and PWM_STOP pins (again, in systems where the PFC
stage is the master) is the brownout protection, thanks to the hysteresis provided.
The brownout protection is basically a not-latched device shutdown function that is activated
when a condition of mains undervoltage is detected. This condition may cause overheating
of the primary power section due to an excess of RMS current. Brownout can also cause the
PFC pre-regulator to work open loop and this could be dangerous to the PFC stage itself
and the downstream converter, should the input voltage return abruptly to its rated value.
Another problem is the spurious restarts that may occur during converter power down and
that cause the output voltage of the converter not to decay to zero monotonically. For these
reasons it is usually preferable to shutdown the unit in case of brownout.
IC shutdown upon brownout can be easily realized as shown in Figure 47. The scheme on
the left is of general use, that one on the right can be used if the bias levels of the multiplier
and the RFFCFF time constant are compatible with the specified brownout level and with the
specified holdup time respectively. In this latest case, an additional resistor voltage divider
and one capacitor are not needed.
In table 1 it is possible to find a summary of all of the above mentioned working conditions
that cause the device to stop operating.
Figure 47.
Brownout protection (master PFC)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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L6564 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:10 pin transition-mode PFC controller
L6564D 功能描述:IC PFC CTRLR TRANSITION 10SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - PFC（功率因數(shù)修正） 系列:- 產(chǎn)品培訓(xùn)模塊:GreenChip Synchronous Rectification Control Family of ICs 標(biāo)準(zhǔn)包裝:1 系列:- 模式:間歇導(dǎo)電（DCM） 頻率 - 開關(guān):- 電流 - 啟動(dòng):- 電源電壓:8.6 V ~ 38 V 工作溫度:-20°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:Digi-Reel® 其它名稱:568-5348-6
L6564DTR 功能描述:功率因數(shù)校正 IC Transition Mode PFC 5mA 90uA 1.5% Ref RoHS:否 制造商:Fairchild Semiconductor 開關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
L6564H 功能描述:功率因數(shù)校正 IC High Voltage Startup Trans-Mode PFC 700V RoHS:否 制造商:Fairchild Semiconductor 開關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
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