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L6710

Figure 20. Demo Board Schematic

Figure 21. 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

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

– Double Supply: In this case VCC supply directly the controller (12V) while VIN supplies the HS drains

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 pro-

grammed through the jumpers JP1, JP2 and JP6 as previously illustrated. JP6 selects now VCC or

Some examples are reported in the following Figures 22 and 23.

L6710

U1

PGOOD

PGND

PGNDS

ISEN2

LGATE2

VSEN

FB

PHASE2

UGATE2

BOOT2

VCC

COMP

SGND

OSC

VID0

VID1

VID2

VID3

VID4

ISEN1

LGATE1

PHASE1

UGATE1

BOOT1

VCCDR

5

31

35

36

38

21

20

41

3

43

42

40

19

28

27

26

24

25

6, 7

39

30

13

9

8

17

18

FBR

FBG

22

C1

R8

C2

R4

R3

Q3

Q4

C3

L2

C7

R11

D3

C6

C11..C14

C15,

C24

R1

JP3

R2

S1

S0

S3

S2

S4

R5

R6

Q1

L1

Q2

C4

D4

C5

Vin

GNDin

GNDCORE

VoutCORE

PGOOD

FBG

FBR

DZ1

C8

JP2

JP1

R13

R15

R12

R14

C9,C10

R9

R18

D1

R17

R16

Q1a

Q3a

D2

R19

R20

JP5

JP4

Vcc

GNDcc

JP6

To

Vcc pin

R21

VID5

29

S5

14

REF_OUT

12

OUTEN

To

PGNDS

C25

R10

L6710 EVALUATION BOARD REV.1

NTC1

R22

To

Vcc pin

C26

OUTEN

R7a

R7

JP7

JP8

C28

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)