L6711

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Table of Contents

1

FEATURES ........................................................................................................................................1

2

APPLICATIONS .................................................................................................................................1

3

DESCRIPTION...................................................................................................................................1

4

DEVICE DESCRIPTION ..................................................................................................................13

5

CURRENT READING AND CURRENT SHARING CONTROL LOOP ............................................13

5.1

LOW SIDE CURRENT READING..........................................................................................14

5.2

INDUCTOR CURRENT READING ........................................................................................15

6

DAC SELECTION ............................................................................................................................16

7

REMOTE VOLTAGE SENSE...........................................................................................................16

7.1

WARNING:.............................................................................................................................16

8

VOLTAGE POSITIONING................................................................................................................17

8.1

DROOP FUNCTION ..............................................................................................................17

8.2

OFFSET .................................................................................................................................18

8.3

INTEGRATED THERMAL SENSOR......................................................................................19

9

DYNAMIC VID TRANSITION ...........................................................................................................20

9.1

VID_SEL = OPEN (SEE FIGURE 14). ...................................................................................21

9.1.1

WARNING: .....................................................................................................................21

9.2

VID_SEL = GND (SEE FIGURE 15). .....................................................................................22

10

ENABLE AND DISABLE ..................................................................................................................22

10.1 OUTEN PIN............................................................................................................................22

10.2 NOCPU (VID [0;5]=11111X) ..................................................................................................22

11

SOFT START ...................................................................................................................................23

12

OUTPUT VOLTAGE MONITOR AND PROTECTIONS ...................................................................23

12.1 UVP PROTECTION ...............................................................................................................23

12.2 PROGRAMMABLE OVP PROTECTION ...............................................................................23

12.3 PRELIMINARY OVP PROTECTION (PRE-OVP) ..................................................................23

13

OVERCURRENT PROTECTION .....................................................................................................24

13.1 LS MOSFET SENSE (CS_SEL=OPEN) OVERCURRENT ...................................................25

13.2 TON LIMITED OUTPUT VOLTAGE.......................................................................................25

13.2.1 CONSTANT CURRENT OPERATION ...........................................................................25

13.3 INDUCTOR SENSE (CS_SEL = SGND) OVER CURRENT..................................................26

14

OSCILLATOR...................................................................................................................................27

15

DRIVER SECTION...........................................................................................................................28

16

POWER DISSIPATION ....................................................................................................................28

17

SYSTEM CONTROL LOOP COMPENSATION...............................................................................29

18

LAYOUT GUIDELINES ....................................................................................................................31

18.1 POWER CONNECTIONS. .....................................................................................................31

18.2 POWER CONNECTIONS RELATED. ...................................................................................32

18.3 CURRENT SENSE CONNECTIONS.....................................................................................33

19

EMBEDDING L6711-BASED VRDS….............................................................................................34

20

TQFP48 MECHANICAL DATA & PACKAGE DIMENSIONS ...........................................................35