L6235Q datasheet(5/33 Pages) STMICROELECTRONICS

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L6235Q

Pin connection

Doc ID 018997 Rev 2

5/33

15, 16

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 must be connected to GND or +5 V.

Logic input

Chip enable. Low logic level switches off all power MOSFETs. If not

used, it must be connected to +5 V.

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 must be

connected to +5 V.

VBOOT

Supply voltage Bootstrap voltage needed for driving the upper power MOSFETs.

22, 23

OUT3

Power output

Output 3.

26, 27

VSB

Power supply

Half bridge 3 power supply voltage. It must be connected to the

supply voltage together with pin VSA.

34, 35

VSA

Power supply

Half bridge 1 and half bridge 2 power supply voltage. It must be

connected to the supply voltage together with pin VSB.

38, 39

OUT2

Power output

Output 2.

VCP

Output

Charge pump oscillator output.

Sensor input

Single ended Hall effect sensor input 2.

Sensor input

Single ended Hall effect sensor input 3.

Table 3.

Pin description (continued)

Name

Type

Function

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