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參數(shù)資料
| 型號(hào)： | L6711 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 3 PHASE CONTROLLER WITH DYNAMIC VID AND SELECTABLE DACs |
| 中文描述： | 3相控制器，動(dòng)態(tài)VID和可選數(shù)模轉(zhuǎn)換器 |
| 文件頁數(shù)： | 23/38頁 |
| 文件大?。?/td> | 591K |
| 代理商： | L6711 |
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L6711
11 SOFT START
During soft start, a ramp is generated increasing the loop reference from 0V to the final value programmed
by VID in 2048 clock periods as shown in
Figure 16. Once the soft start begins, the reference is increased: upper and lower MOS begin to switch
and the output voltage starts to increase with closed loop regulation. At the end of the digital soft start, the
SS_END signal is then driven high.
The Under Voltage comparator is enabled when the reference voltage reaches 0.6V while Over Voltage
Comparator is always enabled during soft start with a threshold equal to the 115% of the programmed ref-
erence or the threshold programmed by R
OVP
(see relevant section).
Figure 16. Soft Start
12 OUTPUT VOLTAGE MONITOR AND PROTECTIONS
The device monitors through pin VSEN the regulated voltage in order to manage the OVP / UVP condi-
tions.
12.1 UVP Protection
If the output voltage monitored by VSEN drops below the 60% of the reference voltage for more than one
clock period, the device turns off all mosfets and the OSC/FAULT is driven high (5V). The condition is
latched; to recover it is required to cycle Vcc or the OUTEN pin.
12.2 Programmable OVP Protection
Once VCC crosses the turn-ON threshold and the device is enabled (OUTEN = 1), the device provides a
programmable Over Voltage protection; when the voltage sensed overcomes the programmed threshold,
the controller permanently switches on all the low-side mosfets and switches off all the high-side mosfets
in order to protect the load. The OSC/ FAULT pin is driven high (5V) and power supply or OUTEN pin cy-
cling is required to restart operations.
The OVP threshold is programmed through the OVP pin: leaving the pin floating, it is internally pulled-up
and the threshold is set at 115% (Typ.) of the programmed output voltage. Connecting the OVP pin to
SGND through a resistor R
OVP
, the OVP threshold becomes a fixed voltage as follow:
O
VPTH
= 1.455 · R
OVP
· 12.5
μ
12.3 Preliminary OVP Protection (Pre-OVP)
While VCC pin is under the turn-ON threshold, a preliminary-OVP protection turns on the low side mosfets
as long as the FBR pin voltage is greater than 1.8V. This protection is enabled when VCC stays within the
V
CC
=V
CCDR
V
LGATEx
SS_END
V
OUT
t
t
t
t
Turn ON threshold
2048 Clock Cycles
(CH1=VOUT; CH2=LGATEx; CH3=SS_END)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6711TR | 3 PHASE CONTROLLER WITH DYNAMIC VID AND SELECTABLE DACs |
| L6714 | 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs |
| L6714TR | 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6711_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3 Phase controller with dynamic VID and selectable DACs |
| L6711TR | 功能描述:DC/DC 開關(guān)控制器 3 PHASE CONTROLLER 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 |
| L6712 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712_05 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
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