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參數(shù)資料
| 型號： | L6714 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| 封裝： | 10 X 10 MM, LEAD FREE, TQFP-64 |
| 文件頁數(shù)： | 33/70頁 |
| 文件大?。?/td> | 694K |
| 代理商： | L6714 |
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L6714
Dynamic VID transitions
39/70
13
Dynamic VID transitions
The device is able to manage Dynamic VID Code changes that allow Output Voltage
modification during normal device operation. OVP and UVP signals (and PGOOD in case of
AMD Mode) are masked during every VID transition and they are re-activated after the
transition finishes with a 32 clock cycles delay to prevent from false triggering due to the
transition.
When changing dynamically the regulated voltage (D-VID), the system needs to charge or
discharge the output capacitor accordingly. This means that an extra-current ID-VID needs to
be delivered, especially when increasing the output regulated voltage and it must be
considered when setting the over current threshold. This current can be estimated using the
following relationships:
where dVOUT is the selected DAC LSB (6.25mV for VR11 and VR10 Extended DAC or 25mV
for AMD DAC) and TVID is the time interval between each LSB transition (externally driven).
Overcoming the OC threshold during the dynamic VID causes the device to enter the
constant current limitation slowing down the output voltage dV/dt also causing the failure in
the D-VID test.
L6714 checks for VID code modifications (See Figure 13) on the rising edge of an internal
additional DVID-clock and waits for a confirmation on the following falling edge. Once the
new code is stable, on the next rising edge, the reference starts stepping up or down in LSB
increments every VID-clock cycle until the new VID code is reached. During the transition,
VID code changes are ignored; the device re-starts monitoring VID after the transition has
finished on the next rising edge available. VID-clock frequency (FDVID) depends on the
operative mode selected: for Intel Mode it is in the range of 1MHz to assure compatibility
with the specifications while, for AMD Mode, this frequency is lowered to about 250kHz.
When L6714 performs a D-VID transition in AMD Mode, DVID pin is pulled high as long as
the device is performing the transition (also including the additional 32clocks delay)
Warning:
If the new VID code is more than 1 LSB different from the
previous, the device will execute the transition stepping the
reference with the DVID-clock frequency FDVID until the new
code has reached: for this reason it is recommended to
carefully control the VID change rate in order to carefully
control the slope of the output voltage variation especially in
Intel Mode.
I
DVID
–
C
OUT
dV
OUT
dT
VID
------------------
=
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參數(shù)描述 |
|---|---|
| L6714TR | 功能描述:功率驅(qū)動器IC 4 Phase Controller RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6716 | 制造商:STMicroelectronics 功能描述:DC DC Cntrlr Quad-OUT Sync Step Down 48-Pin VFQFPN EP Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:2/3/4 Phase Controlr Embedded Driver |
| L6716TR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2/3/4 phase CNTRL Embedded Drivers RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6717 | 制造商:STMicroelectronics 功能描述:High-Efficiency Hybrid AM2r2 Controller 48-Pin VFQFPN Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
| L6717A | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
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