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參數(shù)資料
| 型號： | L6611N |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 電源管理 |
| 英文描述： | 5-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP20 |
| 封裝： | DIP-20 |
| 文件頁數(shù)： | 15/28頁 |
| 文件大?。?/td> | 662K |
| 代理商： | L6611N |
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L6611
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DFAULT; in the "Application ideas" section, another simple circuit is showed to guarantee the same pro-
tection without the SCR.
– Dmon input undervoltage: when an undervoltage on Dmon is detected, MFAULT is put high, Cout is
pulled low (an internal OCP_BOUNCE signal is generated, see fig. 19) and PW_OK falls down. This
function is enabled 64ms after the UVLO signal falls down. Debounce logic is implemented so that
MFAULT and OCP_BOUNCE signals are generated only if the undervoltage condition lasts more than
500s.
The Dmon UV and OV protections can be set to work with thresholds set for 5V or 3.3V output voltage:
the choice depends on the IC programming.
Figure 20. Fault timing diagram
5
AC SENSE (MAINS UNDERVOLTAGE WARNING)
The device monitors the primary bulk voltage and warns the system when the power is about to be lost pulling
down the PW_OK output.
The ACsns pin is typically connected to one of the windings of the main transformer (see fig. 21). Through a
single-diode rectification filter, a voltage equal to VB = VBULK/N (where VBULK is the voltage across the bulk ca-
pacitor on primary side and N is the transformer turn ratio) is present at point B. A resistor (RF) could be useful
to clamp voltage spikes present.
The fault signal is generated by means of AC_GOOD, the output of an internal comparator; this comparator is
internally referred to a trimmable 2.5V reference and indicates an AC fault if the voltage applied at its externally
available (non-inverting) input is below the internal reference, as shown in fig. 21.
This comparator is provided with current hysteresis instead of a more usual voltage hysteresis: an internal 50A
current generator is ON if the voltage is below 2.5V and is turned off when the voltage applied at the non-invert-
ing input exceeds 2.5V.
This approach provides an additional degree of freedom: it is possible to set the ON threshold and the OFF
Dmon(*)
Mfault
POK
Dfault current
Cout
Output
Mfault
POK
Main output’s overvoltage
Output
Mfault
POK
Main output’s undervoltage
Auxiliary output’s overvoltage
Auxiliary output’s undervoltage
(*) Dmon is connected to the Auxiliary output Rail
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6615 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH/LOW SIDE LOAD SHARE CONTROLLER |
| L6615D | 功能描述:DC/DC 開關(guān)控制器 H/L Load Share Cont 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 |
| L6615D013TR | 功能描述:DC/DC 開關(guān)控制器 H/L Load Share Cont 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 |
| L6615DTR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH/LOW SIDE LOAD SHARE CONTROLLER |
| L6615N | 功能描述:DC/DC 開關(guān)控制器 H/L Load Share Cont 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 |
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