參數(shù)資料
型號(hào): L6714TR
廠商: 意法半導(dǎo)體
英文描述: 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs
中文描述: 4英特爾VR10,VR11和AMD的6位嵌入式CPU的司機(jī)相控制器
文件頁(yè)數(shù): 28/70頁(yè)
文件大?。?/td> 572K
代理商: L6714TR
Configuring the device
L6714
28/70
8
Configuring the device
Multiple DACs and different current reading methodologies need to be configured before the
system starts-up by programming the apposite pin DAC/CS_SEL.
The configuration of this pin identifies two main working areas (
See Table 10
) distinguishing
between compliancy with Intel VR10,VR11 or AMD 6BIT specifications. According to the
main specification considered, further customs can be done: main differences are regarding
the DAC table, soft-start implementation, protection management and Dynamic VID
Transitions. Of course, the Current Reading method can be still selected through DAC /
CS_SEL pin.
See Table 11
and
See Table 12
for further details about the device configuration.
8.1
DAC selection
L6714 embeds a selectable DAC (through DAC/CS_SEL,
See Table 10
) that allows to
regulate the output voltage with a tolerance of ±0.5% (±0.6% for AMD DAC) recovering from
offsets and manufacturing variations. In case of selecting Intel Mode, the device
automatically introduces a -19mV (both VRD10.x and VR11) offset to the regulated voltage
in order to avoid any external offset circuitry to worsen the guaranteed accuracy and, as a
consequence, the calculated system TOB.
Note:
Filter DAC/CS_SEL pin with 100pF(max) vs. SGND.
Output voltage is programmed through the VID pins: they are inputs of an internal DAC that
is realized by means of a series of resistors providing a partition of the internal voltage
reference. The VID code drives a multiplexer that selects a voltage on a precise point of the
divider. The DAC output is delivered to an amplifier obtaining the voltage reference (i.e. the
set-point of the error amplifier, V
REF
).
Table 10.
DAC / CS_SEL settings (
See Note
).
DAC / CS_SEL
Resistance vs. SGND
DAC
Current sense
method
OVP
UVP
0 (Short)
Intel
Inductor DCR
VID + 150mV
(typ) or
Programmable
-750mV (typ)
170k
MOSFET R
dsON
270k
AMD
Inductor DCR
1.800V (typ) or
Programmable
-750mV (typ)
OPEN
MOSFET R
dsON
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