L6714 datasheet(44/70 Pages) STMICROELECTRONICS

Il numero della parte	L6714

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

PDF	70 Pages

Scroll/Zoom	100%

Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

Logo

44 / 70 page

Soft start

L6714

44/70

Figure 15. Soft-start time for Intel mode.

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):

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).

100

1000

Rssosc [kOhms] vs. SGND

Time to Vboot

Time to 1.6000V

OUT

------------------

3.125

SW kkHz

[]

⋅

3.125

SW kHz

[]

⋅

--------------------------------------------------

⇒

L6714 Scheda tecnica(PDF) 44 Page - STMicroelectronics