參數(shù)資料
型號： L6717
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, QCC48
封裝： 7 X 7 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFQFPN-48
文件頁數(shù)： 38/56頁
文件大小： 1081K
代理商： L6717
L6717
Output voltage monitoring and protections
Doc ID 17326 Rev 1
43/56
soon as the difference between the output and the input of this OpAmp is higher than
500mV, the device latches in HiZ. FLT pin is driven high.
To recover from a latch condition, cycle VCC or EN.
Figure 14.
FB disconnection protection
8.3
PWRGOOD
It is an open-drain signal set free after the soft-start sequence has finished; it is the logic
AND between the internal CORE and NB PGOOD (or just the CORE PGOOD in PVI mode).
It is pulled low when the output voltage of one of the two sections drops 250 mV below the
programmed voltage. It is masked during on-the-fly VID transitions as well as when the
CORE section is set to OFF (from SVI bus) while the NB section is still operative.
8.4
Overcurrent
The overcurrent threshold has to be programmed to a safe value, in order to be sure that
each section doesn't enter OC during normal operation of the device. This value must take
into consideration also the extra current needed during the OTF-VID transition (IOTF-VID) and
the process spread and temperature variations of the sensing elements (Inductor DCR).
Moreover, since also the internal threshold spreads, the design has to consider the mini-
mum/maximum values of the threshold. Considering the reading method, the two sections
will show different behaviors in OC.
8.4.1
CORE section
L6717 performs two different OC protections for the CORE section: it monitors both the total
current and the per-phase current and allows to set an OC threshold for both.
–
Per-phase OC.
Maximum information current per-phase (IINFOx) is internally limited to 35 μA. This
end-of-scale current (IOC_TH) is compared with the information current generated
for each phase (IINFOx). If the current information for the single phase exceed the
end-of-scale current (i.e. if IINFOx > IOC_TH), the device will turn-on the LS
MOSFET until the threshold is re-crossed (i.e. until IINFOx < IOC_TH).
–
Total current OC.
ILIM pin allows to define a maximum total output current for the system (IOC_TOT).
ILIM current is sourced from the ILIM pin (not altered by DRP_ADJ command). By
connecting a resistor RILIM to SGND, a load indicator with 2.5 V (VOC_TOT) end-of-
CORE_REFERENCE
FB
COMP
VSEN
FBG
RF
CF
RFB
To VDD_CORE
(Remote Sense)
from DAC...
CORE and NB SECTION - VSEN AND FBG DISCONNECTION
500mV
FBG DISCONNECTED
CS1-
30
μA
600mV
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
L6717ATR 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller T/R 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Tape and Reel 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver
L6717TR 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 High-Efficienc AM2r2 Hybrid Controller 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
L6718TR 功能描述:其他電源管理 Multiphase Dual PWM VR12 25MHz LTB RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
L6720 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
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