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參數資料
| 型號： | L6591TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO16 |
| 封裝： | ROHS COMPLIANT, SOP-16 |
| 文件頁數： | 10/32頁 |
| 文件大?。?/td> | 560K |
| 代理商： | L6591TR |
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Application information
L6591
18/32
Doc ID 14821 Rev 4
Figure 11.
Hiccup-mode OCP: timing diagram (device self-supplied)
5.5
Latched shutdown
The L6591 is equipped with a comparator having the non-inverting input externally available
at the pin DIS (#2) and with the inverting input internally referenced to 4.5 V. As the voltage
on the pin exceeds the internal threshold, the IC is immediately shut down and its
consumption reduced at a low value.
The information is latched and it is necessary to let the voltage on the Vcc pin go below the
UVLO threshold to reset the latch and restart the IC. To keep the latch supplied as long as
the converter is connected to the input source, the HV generator is activated periodically so
that Vcc oscillates between the start-up threshold VccON and VccON – 1 V. It is then
necessary to disconnect the converter from the input source to restart the IC. This operation
is shown in the timing diagram of Figure 12. Activating the HV generator in this way cuts its
power dissipation approximately by three (as compared to the case of continuous
conduction) and keeps peak silicon temperature close to the average value.
Vc c
LVG, HV G
OC P latch
Sec ondary diode is s horted here
t
V
CS
Vcc_ OK
t
1.5 V
PFC _S top
t
Vcc
on
Vccoff
Vcc
resta rt
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相關代理商/技術參數 |
參數描述 |
|---|---|
| L6598 | 功能描述:PMIC 解決方案 High Volt Reson Cont RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| L6598_04 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH VOLTAGE RESONANT CONTROLLER |
| L6598D | 功能描述:PMIC 解決方案 High Volt Reson Cont RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| L6598D013TR | 功能描述:PMIC 解決方案 High Volt Reson Cont RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| L6598D016TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:High voltage resonant controller |
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