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参数资料
| 型号： | L6714TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| 封装： | 10 X 10 MM, LEAD FREE, TQFP-64 |
| 文件页数： | 32/70页 |
| 文件大小： | 694K |
| 代理商： | L6714TR |
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Voltage positioning
L6714
38/70
12.2
Offset (Optional)
The OFFSET pin allows programming a positive offset (VOS) for the output voltage by
connecting a resistor ROFFSET vs. SGND; this offset has to be considered in addition to the
one already introduced during the production stage for the Intel VR10,VR11 Mode.
The OFFSET pin is internally fixed at 1.240V (See Table 4) a current is programmed by
connecting the resistor ROFFSET between the pin and SGND: this current is mirrored and
then properly sunk from the FB pin as shown in Figure 12. Output voltage is then
programmed as follow:
Offset resistor can be designed by considering the following relationship (RFB is fixed by the
Droop effect):
Offset automatically given by the DAC selection differs from the offset implemented through
the OFFSET pin: the built-in feature is trimmed in production and assures ±0.5% error
(±0.6% for the AMD DAC) over load and line variations.
Figure 12. Voltage positioning with offset
V
OUT
V
REF
R
FB
I
DROOP
I
OFFSET
–
()
–
=
R
OFFSET
1.240V
V
OS
-------------------
R
FB
=
1.240V
ROFFSET
OFFSET
VREF
FB
COMP
VSEN
64k
FBR
FBG
64k
RF
CF
RFB
To Vcore
(Remote Sense)
I DR
OOP
I OFFSET
DROOP
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| L6714 | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
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