L6727 datasheet(26/34 Pages) STMICROELECTRONICS

26 / 34 page

20 A demonstration board

L6727

26/34

Doc ID 12933 Rev 4

11.1

Board description

11.1.1

Power input (VIN)

This is the input voltage for the power conversion. The high-side MOSFET drain is

connected to this input. Supply must be compliant with VIN recommended operating

conditions and capacitors rating.

If VIN voltage is compliant also to VCC range listed in recommended operating conditions, it

can supply also the device through R16 resistor. When VCC > 5 V, R6 need to be removed.

11.1.2

Power output (VOUT)

This is the output voltage of the power conversion. The output voltage is programmed to

1.25 V. It can be changed by replacing R13. R6 allows to adjust OCP threshold when

VCC = 5 V.

11.1.3

IC additional supply (VCC)

The controller can be supplied separately from the power conversion through VCC input. In

this case, to separate VCC from VIN, R16 resistor must be removed. When VCC > 5 V, R6

need to be removed.

11.1.4

Test points

The following test points are provided to allow easy probing of important signals:

–

COMP: output of the error amplifier;

–

FB: inverting input of the error amplifier;

–

PH: Phase pin of the device;

–

LG: Low-Side gate pin of the device;

–

UG: High-Side gate pin of the device.

11.1.5

Demonstration board efficiency

Figure 15.

20 A demonstration board efficiency

L6727 Datasheet(PDF) 26 Page - STMicroelectronics