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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Soft start

L6714

15.3

Low-Side-Less startup

In order to avoid any kind of negative undershoot on the load side during start-up, L6714

performs a special sequence in enabling LS driver to switch: during the soft-start phase, the

LS driver results disabled (LS=OFF) until the HS starts to switch. This avoid the dangerous

negative spike on the output voltage that can happen if starting over a pre-biased output

(See Figure 17).

This particular feature of the device masks the LS turn-on only from the control loop point of

view: protections are still allowed to turn-ON the LS MOSFET in case of over voltage if

needed.

Figure 17. Low-Side-Less start-up comparison

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