L6727

Pins description and connection diagrams

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2

Pins description and connection diagrams

Figure 3.

Pins connection (top view)

2.1

Pin descriptions

Table 2.

Pins descriptions

1

2

3

4

VCC

FB

COMP / DIS / OC

PHASE

LGATE

GND

UGATE

BOOT

5

6

7

8

L6727

Pin #

Name

Function

1BOOT

HS Driver Supply.

Connect through a capacitor (100nF) to the floating node (LS-Drain) pin

and provide necessary bootstrap diode from VCC.

2

UGATE

HS Driver Output. Connect to HS mosfet gate.

3GND

All internal references, logic and drivers are connected to this pin.

Connect to the PCB ground plane.

4

LGATE

LS Driver Output. Connect to LS mosfet gate.

5VCC

Device and LS Driver power supply.

Operative range from 4.1V to 13.2V. Filter with at least 1

µF MLCC to GND.

6FB

Error Amplifier Inverting Input.

reference.

7

COMP / DIS

/ OC

compensate the control-loop.

DIS. The device can be disabled by forcing this pin lower than 0.5V(typ). To

disable the device, the external pull-down need to overcome 10mA of

COMP output current for about 15

µs. Once disabled, COMP output current

drops to 20

µA.

(ONLY IF VCC is supplied by 5V bus) to program OC threshold. When

8

PHASE

HS Driver return path, current-reading and adaptive-dead-time monitor.

current. This pin is also used by the adaptive-dead-time control circuitry to

monitor when HS mosfet is OFF.