L6711 datasheet(3/38 Pages) STMICROELECTRONICS

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L6711

Figure 3. Pin Connections (Top view)

Table 4. Pin Function

N°

Name

Description

VCCDR1

Channel 1 LS driver supply: it can be varied from 5V to 12V buses.

It must be connected together with other VCCDRx pins.

Filter locally with at least 1

µF ceramic cap vs. PGND1.

LGATE1

Channel 1 LS driver output.

A little series resistor helps in reducing device-dissipated power.

PGND1

Channel 1 LS driver return path.

Connect to Power Ground Plane.

VCC

Device supply voltage. The operative supply voltage is 12V ±15%.

Filter with 1

µF capacitor (Typ.) vs. SGND.

SGND

All the internal references are referred to this pin. Connect it to the PCB signal ground.

OFFSET Offset programming pin, internally fixed at 1.240V.

Short to SGND to disable the offset generation or connect through a resistor ROFFSET to SGND

to program an offset (positive or negative, depending on TC status) to the regulated output volt-

age as reported in the relative section.

COMP

This pin is connected to the error amplifier output and is used to compensate the control feed-

back loop.

This pin is connected to the error amplifier inverting input and is used to compensate the voltage

control feedback loop.

Connecting a resistor between this pin and VSEN pin allows programming the droop effect.

OVP

Over Voltage protection setup pin: it allows programming the OVP intervention.

Internally pulled-up to 5V, it sources a constant 12.5

µA current.

Leaving the pin floating the OVP threshold is set to 115% (Typ.) of the programmed voltage

Connecting a resistor ROVP to SGND, it sets the OVP threshold to a fixed programmable voltage

(see relevant section for further details). Filter with 10nF vs. SGND in this case.

VSEN

Manages Over&Under-voltage conditions. It is internally connected with the output of the

Remote Sense Buffer for Remote Sense of the regulated voltage.

If no Remote Sense is implemented, connect it directly to the regulated voltage in order to man-

age OVP and UVP.

36 35 34 33 32 31 30 29 28 27 26 25

123456789

10 11 12

OUTEN

CS1-

CS1+

CS2-

CS2+

CS3-

CS3+

CS_SEL

OSC / FAULT

VID5

VID0

N.C.

PHASE1

UGATE1

BOOT1

BOOT2

UGATE2

PHASE2

VCCDR2

LGATE2

PGND2

VCCDR3

N.C.

L6711

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