AN2785 datasheet(5/51 Pages) STMICROELECTRONICS

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AN2785

Pin description

Doc ID 14785 Rev 1

5/51

Pin description

Table 1.

Pin description

Pin n.

Pin name

Type

Function

PHASE

Driver logic input (active high)

2SD

Shut-down logic input (active low)

BRAKE

Driver logic input (active low)

VCC

Lower section supply voltage

Dead time setting

CPOUT

Comparator output (open drain)

GND

Ground

CP-

Comparator negative input

CP+

Comparator positive input

LVG (1)

Low side driver output

Not connected

OUT

High side (floating) common voltage

HVG (1)

The circuit provides less than 1 V on the LVG and HVG pins (at Isink = 10 mA), with VCC > 3 V. This allows

omitting the “bleeder” resistor connected between the gate and the source of the external MOSFET

normally used to hold the pin low; the gate driver also ensures low impedance in SD condition.

High side driver output

BOOT

Floating section (bootstrap) supply voltage

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