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參數(shù)資料
| 型號(hào)： | L6740LTR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Hybrid controller (4+1) for AMD SVID and PVID processors |
| 中文描述： | 混合控制器（4 1對(duì)AMD SVID和PVID）處理器 |
| 文件頁數(shù)： | 15/44頁 |
| 文件大小： | 657K |
| 代理商： | L6740LTR |
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L6740L
Device description and operation
15/44
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Device description and operation
L6740L is a hybrid CPU Power Supply Controller compatible with both Parallel (PVI) and
Serial (SVI) protocols for AMD K8 - Second Generation 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.
L6740L 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 can be achieved by enabling LTB Technology
(TM)
. NB
phase (when enabled) will be automatically phase-shifted with respect to the CORE phases
in order to reduce the total input rms current amount.
PSI_L Flag is sent to the VR through the SVI bus. The controller monitors this flag and
selctively 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 Over-Voltage protection and adjustable constant Over-
Current protection. Voltage positioning (LL) is possible thanks to an accurate fully-differential
current-sense across the main inductors for the CORE Section and thanks to the loss-less
current sense across Low-Side MOSFET R
dsON
for the NB section. In both cases, LL may
be disabled and the generated current information may be used to implement a Load Indica-
tor function.
L6740L 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 dan-
gerous current return through the main inductors as well as negative undershoot on the out-
put voltage if the output filter is still charged before start-up.
L6740L also 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,
L6740L is available in TQFP48 Package.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6741 | 功能描述:功率驅(qū)動(dòng)器IC SnglPphase Dual MOSFET Driver 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(shí)間: 下降時(shí)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 |
| L6741TR | 功能描述:功率驅(qū)動(dòng)器IC SnglPphase Dual MOSFET Driver 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(shí)間: 下降時(shí)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 |
| L6743 | 功能描述:功率驅(qū)動(dòng)器IC SnglPphase Dual MOSFET Driver 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(shí)間: 下降時(shí)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 |
| L6743_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:High current MOSFET driver |
| L6743B | 功能描述:功率驅(qū)動(dòng)器IC Hi-current MOSFET Driver 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(shí)間: 下降時(shí)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 |
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