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L6918 L6918A

Figure 20. Power supply configuration

– Single Supply: In this case JP6 has to be completely shorted. The device is supplied with the same rail

that is used for the conversion. With an additional zener diode DZ1 a lower voltage can be derived to

supply the mosfets driver if Logic level mosfet are used. In this case JP1 must be left open so that the

and JP2 can be freely shorted in one of the two positions.

for the power conversion. This last one can start indifferently from the 5V bus (Typ.) or from other buses

allowing maximum flexibility in the power conversion. Supply for the mosfet driver can be programmed

on the requirements.

Some examples are reported in the following Figures 21 and 22.

Figure 21. Jumpers configuration: Double Supply

Vin

GNDin

DZ1

JP2

JP1

Vcc

GNDcc

JP6

To Vcc pin

To HS Drains (Power Input)

To BOOTx (HS Driver Supply)

To VCCDR pin (LS Driver Supply)

Vin = 5V

GNDin

DZ1

JP2

JP1

Vcc = 12V

GNDcc

JP6

Vcc = 12V

HS Drains = 5V

HS Supply = 5V

VCCDR (LS Supply) = 5V

Vin = 5V

GNDin

DZ1

JP2

JP1

Vcc = 12V

GNDcc

JP6

Vcc = 12V

HS Drains = 5V

HS Supply = 12V

VCCDR (LS Supply) = 12V