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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)： | 10/56頁 |
| 文件大?。?/td> | 1081K |
| 代理商： | L6717 |
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Device description and operation
L6717
18/56
Doc ID 17326 Rev 1
4
Device description and operation
L6717 is a hybrid CPU power supply controller compatible with both parallel (PVI) and serial
(SVI) protocols for AMD Processors. The device provides complete control logic and
protections for a high-performance step-down DC-DC voltage regulator, optimized for
advanced microprocessor power supply supporting both PVI and SVI communication. It
embeds two independent controllers for CPU CORE and the integrated NB, each one with
its own set of protections. NB phase (when enabled) is automatically phase-shifted with
respect to the CORE phases in order to reduce the total input rms current amount.
The device features an additional power manager I2C interface to easy the system design
for enthusiastic application where the main parameters of the voltage regulator have to be
modified. L6717 is able to adjust the regulated voltage, the switching frequency and also the
OV protection threshold through the power manager I2C bus while the application is running
assuring fast and reliable transitions.
Dynamic phase management (DPM) allows the device to automatically adjust the phase
count according to the current delivered to the load. This feature allow the system to keep
alive only the phases really necessary to sustain the load saving in power dissipation so
optimizing the efficiency over the whole current range of the application. DPM can be
enabled through the power manager I2C bus.
L6717 is able to detect which kind of CPU is connected in order to configure itself to work as
a single-plane PVI controller or dual-plane SVI controller.
The controller performs a single-phase control for the NB section and a programmable 2-to-
4 phase control for the CORE section featuring dual-edge non-latched architecture: this
allows fast load-transient response optimizing the output filter consequently reducing the
total BOM cost. Further reduction in output filter can be achieved by enabling LTB
Technology
.
PSI_L flag is sent to the VR through the SVI bus. The controller monitors this flag and
selectively modifies the phase number in order to optimize the system efficiency when the
CPU enters low-power states. This causes the over-all efficiency to be maximized at light
loads so reducing losses and system power consumption.
Both sections feature programmable overvoltage protection and adjustable constant
overcurrent protection. Voltage positioning (LL) is possible thanks to an accurate fully-
differential current-sense across the main inductors for both sections.
L6717 features dual remote sensing for the regulated outputs (CORE and NB) in order to
recover from PCB voltage drops also protecting the load from possible feedback network
disconnections.
LSLess start-up function allows the controller to manage pre-biased start-up avoiding
dangerous current return through the main inductors as well as negative undershoot on the
output voltage if the output filter is still charged before start-up.
L6717 supports V_FIX mode for system debugging: in this particular configuration the SVI
bus is used as a static bus configuring 4 operative voltages for both the sections and
ignoring any serial-VID command.
When working in PVI mode, the device features on-the-fly VID management: VID code is
continuously sampled and the reference update according to the variation detected,
L6717 is available in VFQFPN48 package.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6728HTR | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728H | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728 | 1.5 A SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, DSO10 |
| L6728TR | 1.5 A SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, DSO10 |
| L6731BTR | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
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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