L6235PD datasheet(4/25 Pages) STMICROELECTRONICS

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L6235

4/25

PIN DESCRIPTION

PACKAGE

Name

Type

Function

SO24/

PowerDIP24

PowerSO36

PIN #

110

Sensor Input

Single Ended Hall Effect Sensor Input 1.

DIAG

Open Drain

Output

Overcurrent Detection and Thermal Protection pin. An

internal open drain transistor pulls to GND when an

overcurrent on one of the High Side MOSFETs is

detected or during Thermal Protection.

SENSEA

Power Supply

Half Bridge 1 and Half Bridge 2 Source Pin. This pin

must be connected together with pin SENSEB to

Power Ground through a sensing power resistor.

RCOFF

RC Pin

RC Network Pin. A parallel RC network connected

between this pin and ground sets the Current

Controller OFF-Time.

OUT1

Power Output

Output 1

6, 7,

18, 19

1, 18,

19, 36

GND

Ground

terminals.

PowerDIP24

and

SO24

packages,

these

pins

are

also

used

for

heat

dissipation toward the PCB. On PowerSO36 package

the slug is connected on these pins.

TACHO

Open Drain

Output

Frequency-to-Voltage open drain output. Every pulse

from pin H1 is shaped as a fixed and adjustable length

pulse.

RCPULSE

RC Pin

RC Network Pin. A parallel RC network connected

between this pin and ground sets the duration of the

Monostable Pulse used for the Frequency-to-Voltage

converter.

SENSEB

Power Supply

Half Bridge 3 Source Pin. This pin must be connected

together with pin SENSEA to Power Ground through a

sensing power resistor. At this pin also the Inverting

Input of the Sense Comparator is connected.

FWD/REV

Logic Input

Selects the direction of the rotation. HIGH logic level

sets Forward Operation, whereas LOW logic level sets

Reverse Operation.

If not used, it has to be connected to GND or +5V..

Logic Input

Chip Enable. LOW logic level switches OFF all Power

MOSFETs.

If not used, it has to be connected to +5V.

VREF

Logic Input

Current Controller Reference Voltage.

Do not leave this pin open or connect to GND.

BRAKE

Logic Input

Brake Input pin. LOW logic level switches ON all High

Side Power MOSFETs, implementing the Brake

Function.

If not used, it has to be connected to +5V.

VBOOT

Supply Voltage Bootstrap Voltage needed for driving the upper Power

MOSFETs.

OUT3

Power Output

Output 3.

VSB

Power Supply

Half Bridge 3 Power Supply Voltage. It must be

connected to the supply voltage together with pin VSA.

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