L6751 datasheet(11/59 Pages) STMICROELECTRONICS

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L6751

Pin description and connection diagrams

Doc ID 023992 Rev 1

11/59

A14

SCSP

Single-phase section current senses positive input.

Connect through an R-C filter to the phase-side of the channel 1 inductor.

B13

SCSN

Single-phase section current senses negative input.

Connect through an Rg resistor to the output-side of the channel inductor.

Filter the output-side of Rg with 100 nF (typ.) to GND.

A15

SIMON

Current monitor output.

A current proportional to the single-phase current is sourced from this pin.

Connect through a resistor RSIMON to GND.

When the pin voltage reaches 1.55 V, overcurrent protection is set and the IC

latches. Filtering through CSIMON to GND allows the delay for OC intervention

to be controlled.

B14

DPM4-6

Connect a resistor divider to GND/VCC5 in order to define the DPM and GDC

strategies. See Table 11 and Table 12 for details.

A16

SRGND

Remote buffer ground sense.

Connect to the negative side of the single-phase load to perform remote

sense.

B15

DPM1-3

Connect a resistor divider to GND/VCC5 in order to define the DPM and GDC

strategies. See Table 11 and Table 12 for details.

A17

SFBR

Remote buffer positive sense.

Connect to the positive side of the single-phase load to perform remote sense.

B16

SVSEN

Remote buffer output.

Output voltage monitor, manages OV and UV protection.

Connect with a resistor RSFB // (RSI - CSI) to SFB.

A18

SFB

Error amplifier inverting input.

Connect with a resistor RSFB // (RSI - CSI) to SVSEN and with an (RSF - CSF)//

CSH to SCOMP.

SCOMP

Error amplifier output.

Connect with an (RSF - CSF)// CSH to SFB. The device cannot be disabled by

pulling low this pin.

A19

IMAX /

SIMAX

Connect a resistor divider to GND/VCC5 in order to define the IMAX and

SIMAX registers. See Table 8 and Table 6 for details.

Table 2.

Pin description (continued)

Pin#

Name

Type

Function

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