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 

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Current reading and current sharing loop

L6714

Figure 9. Current reading connections.

LGATEx

CSx- Rg

ICSx-

25µA

CSx+ Rg

IPHASEx

PHASEx

NO Bias

ICSx-=IINFOx

CSx+

CSx-

IPHASEx

Lx RLx

R

C

Rg

LS Mosfet RdsON Current Sense

Inductor DCR Current Sense

Considering now to match the time constant between the inductor and the R-C filter applied

(Time constant mismatches cause the introduction of poles into the current reading network

causing instability. In addition, it is also important for the load transient response and to let

the system show resistive equivalent output impedance), it results:

--L---- = R ⋅ C

RL

⇒

ICSx-

=

-R----L--

Rg

⋅

IPHASEx = IINFOx ⇒

IINFOX

=

-R----L--

Rg

⋅

IPHASEx

Where IINFOx is the current information reproduced internally.

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