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參數(shù)資料
| 型號： | L6585D |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.6 A POWER FACTOR AND FLUORESCENT LIGHT CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | LEAD FREE, SOP-20 |
| 文件頁數(shù)： | 8/25頁 |
| 文件大?。?/td> | 1478K |
| 代理商： | L6585D |
End of life – window comparator
L6585D
16/25
The four possible configurations are summarized in the following table, together with the
value of resistance to be connected to the EOLP pin in order to obtain the desired setting:
Tracking reference: this setting is suitable for the block capacitor to ground configuration
(Figure 6, left).
In this case the window comparator centre is set by the CTR voltage that is internally
transferred to the EOL structure.
The effect of rectification appears as shifting of the DC voltage component across the block
capacitor, which, under normal conditions, equals one half of the PFC output voltage.
A signal proportional to the DC block capacitor voltage is sent to the EOL-R pin by means of
a resistive divider (RE1 and RE2); the dividers RE1 and RE2 and RP1 and RP2 must be
designed to set the EOL-R voltage equal to CTR under nominal condition.
Fixed reference: this setting is suitable for the lamp to ground configuration (Figure 6, right).
The effect of rectification appears as shifting of the DC lamp voltage.
A resistive divider (RE1 and RE2) senses the voltage across the lamp under normal
condition, that is an AC signal with zero average value whereas in case of asymmetric
rectification the DC value can shift either in positive or negative direction. Two Zener diodes
can be connected back-to-back between the EOL-R pin and the centre of the resistive
divider.
The Zener voltages should differ by an amount as close as possible to the double of the
internal reference to have a symmetrical detection, as it can easily obtained from the
following equations:
●
VUP = VREF + W/2 + VZ1 + VR2
●
VDOWN = VREF – W/2 – VZ2 – VR1
where VUP and VDOWN are the VK values (equal in absolute value) that trigger the window
comparator.
To avoid an immediate intervention of the EOL protection, a filtering is introduced; as long as
the fault condition persists, the Tch internal generator charges the CD up to 4.63V and then
it opens. If this fault condition is still present when the Tch voltage decreases down to 1.5V,
then the half bridge is stopped, otherwise (if the fault disappears) the counting is stopped
and reset.
Table 5.
Configuration of the EOLP pin
EOLP resistor
Symbol
Reference
Half–window amplitude
REOLP > 620K
RFH
Fixed 2.5V
± 720mV
220K = REOLP = 270K
RTL
Tracking with CTR
± 220mV
75K = REOLP = 91K
RFL
Fixed 2.5V
± 220mV
22K = REOLP = 27K
RTL
Tracking with CTR
± 720mV
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6585D_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Combo IC for PFC and ballast control |
| L6585DE | 功能描述:功率因數(shù)校正 IC Combo IC for PFC Ballast control 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L6585DETR | 功能描述:功率因數(shù)校正 IC Combo IC for PFC and ballast control 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| 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 |
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