L6713ATR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
L6713ATR
STMicroelectronics
'L6713ATR' PDF : 64 Pages View PDF
L6713A
Soft-start
Figure 19. Soft-start time for Intel mode when using RSSOSC versus SGND
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
1
Time to Vboot
Time to 1.6000V
10
100
Rssosc [kOhms] vs. SGND
1000
16.2
AMD mode
Once L6713A receives all the correct supplies and enables, and AMD mode has been
selected, it initiates the soft-start by stepping the reference from zero up to the programmed
VID code (See Figure 15); the clock now used to step the reference is the same as the main
oscillator programmed by the OSC pin, SSOSC pin is not applicable in this case. The soft-
start time results then (See Figure 20):
-d---V----O----U----T-
dT
=
3.125
⋅
FSW[kkHz]
⇒
TSS
=
-------------------V----S----S-------------------
3.125 ⋅ FSW[kHz]
where TSS is the time spent to reach VSS and FSW is the main switching frequency
programmed by OSC pin. Protections are active during soft-start, UVP is enabled after the
reference reaches 0.6 V while OVP is always active with the fixed 1.800 V threshold (or the
programmed VOVP).
Figure 20. Soft-start time for AMD mode
4
3.5
3
2.5
2
1.5
1
0.5
0
0
550
500
450
400
350
Time to 1.6000V
300
Time to 1.1000V
250
Switching Frequency per phase
200
200
400
600
800
Rosc [kOhms] to SGND
150
1000
4
3.5
3
2.5
2
1.5
1
0.5
0
0
550
500
450
400
350
Time to 1.6000V
300
Time to 1.1000V
250
Switching Frequency per phase
200
200
400
600
800
Rosc [kOhms] to SGND
150
1000
45/64
Share Link: 