L6740L datasheet(8/44 Pages) STMICROELECTRONICS

8 / 44 page

Pins description and connection diagrams

L6740L

8/44

Pins description and connection diagrams

Figure 5.

Pins connection (Top View)

2.1

Pin descriptions

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

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CS1+

CS1-

CS2+

CS2-

CS3+

CS3-

CS4+

CS4-

OC_PHASE

N.C.

NB_ISEN

N.C.

PWM1

PWM2

PWM3

PWM4

NB_PWM

ENDRV

NB_ENDRV

PWRGOOD

SVD

SVC

PWROK

L6740L

Table 2.

Pin description

Pin#

Name

Function

1VCC

Device power supply.

Operative voltage is 12V ±15%. Filter with 1

µF MLCC to SGND.

2SGND

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

Signal Ground.

COMP

Error amplifier output.

Connect with an RF - CF to FB. The CORE section or the device cannot

be disabled by grounding this pin.

4FB

Error amplifier inverting input.

Connect with a resistor RFB to VSEN and with an RF - CF to COMP. Off-

set current programmed by OS is sunk through this pin.

5DROOP

A current proportional to the total current read is sourced from this pin

according to the Current Reading Gain.

Short to FB to implement Droop Function, if not used, short to SGND.

VSEN

Output voltage monitor.

It manages OVP and UVP protections and PWRGOOD. Connect to the

positive side of the load for remote sensing. See Section 7 for details.

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