L6714 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L6714

4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs

STMicroelectronics 

Prev 41 42 43 44 45 46 47 48 49 50 Next

Soft start

Figure 15. Soft-start time for Intel mode.

8

7

Time to Vboot

6

Time to 1.6000V

5

4

3

2

1

0

1

10

100

Rssosc [kOhms] vs. SGND

L6714

1000

15.2

AMD mode

Once L6714 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 14); 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 16):

-d---V----O----U----T- = 3.125 ⋅

dT

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 0.6V while OVP is always active with the fixed 1.800V threshold (or the

programmed VOVP).

44/70

Share Link: