參數(shù)資料
型號(hào)： L6740L
廠商： STMICROELECTRONICS
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQFP48
封裝： 7 X 7 MM, 1 MM HEIGHT, HTQFP-48
文件頁數(shù)： 22/44頁
文件大?。?/td> 755K
代理商： L6740L
L6740L
Output voltage positioning
re-starts monitoring VID after the transition has finished on the next rising-edge
available. OTFVID-clock frequency (FOTFVID) is 500 kHz.
If the new VID code is more than 1 LSB different from the previous, the device will
execute the transition stepping the reference with the OTFVID-clock frequency FOTFVID
until the new code has reached. The output voltage rate of change will be of 12.5 mV /
4
μsec. = 3.125 mV/μsec.
Figure 11.
PVI mode - on-the-fly VID transitions
●
SVI mode.
As soon as the controller receives a new valid command to set the VID level for one (or
both) of the two sections, the reference of the involved section steps up or down
according to the target-VID with a 3 mV/
μsec. slope (Typ). until the new VID code is
reached.
If a new valid command is issued during the transition, the device updates the target-
VID level and performs the on-the-fly Transition up to the new code.Pre-PWROK Metal
VID
OTF-VID are not managed in this case because the Pre-PWROK Metal VID are stored
after EN is asserted.
●
V_FIX mode.
L6740L checks for SVC/SVD modifications and, once the new code is stable, it steps
the reference of both sections up or down according to the target-VID with a
3 mV/
μsec. slope (Typ). until the new VID code is reached.
OV, UV and PWRGOOD are masked during the transition and re-activated with a 16 clock
cycle delay after the end of the transition to prevent from false triggering.
TOTFVID
x 4 Step VID Transition
t
VID
Sampled
VID
Sampled
VID
Sampled
Ref
Mo
v
ed
(1)
Ref
Mo
v
ed
(2)
Ref
Mo
v
ed
(3)
Ref
Mo
v
ed
(4)
VID
Stab
le
VID [0:5]
Int. Reference
Vout
Tsw
VID
Sampled
VID
Sampled
Ref
Mo
v
ed
(1)
Ref
Mo
v
ed
(1)
Ref
Mo
v
ed
(1)
VID
Sampled
VID
Sampled
4 x 1 Step VID Transition
TVID
VID
Sampled
VID
Sampled
VID
Sampled
VID
Sampled
VID
Sampled
VID
Stab
le
VID
Stab
le
VID
Stab
le
Ref
Mo
v
ed
(1)
VID
Sampled
VID
Sampled
VID
Stab
le
VID
Sampled
VID
Sampled
VID
Sampled
t
OTFVID Clock
Vout Slope Controlled by internal
OTFVID-Clock Oscillator
Vout Slope Controlled by external
driving circuit (TVID)
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