Datasheet

L6229Q Pin connection
Doc ID 15209 Rev 3 7/28
Table 5. Pin description
N° Pin Type Function
1, 21 GND GND Ground terminals.
9TACHO
Open drain
output
Frequency-to-voltage open drain output. Every pulse from pin H
1
is shaped
as a fixed and adjustable length pulse.
11 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.
12 SENSE
B
Power supply
Half bridge 3 source Pin. This pin must be connected together with pin
SENSE
A
to power ground through a sensing power resistor. At this pin also
the Inverting Input of the sense comparator is connected.
13 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 +5 V.
14 EN Logic input
Chip enable. LOW logic level switches OFF all power MOSFETs.
If not used, it has to be connected to +5 V.
15 VREF Logic input
Current controller reference voltage.
Do not leave this pin open or connect to GND.
16 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 +5 V.
17 VBOOT
Supply
voltage
Bootstrap voltage needed for driving the upper power MOSFETs.
19 OUT
3
Power output Output half bridge 3.
20 VS
B
Power supply
Half bridge 3 power supply voltage. It must be connected to the supply
voltage together with pin VS
A
.
22 VS
A
Power supply
Half bridge 1 and half bridge 2 power supply voltage. It must be connected to
the supply voltage together with pin VS
B
.
23 OUT
2
Power output Output half bridge 2.
24 VCP Output Charge pump oscillator output.
25 H
2
Sensor input Single ended hall effect sensor input 2.
26 H
3
Sensor input Single ended hall effect sensor input 3.
27 H
1
Sensor input Single ended hall effect sensor input 1.
28 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.
29 SENSE
A
Power supply
Half bridge 1 and half bridge 2 source pin. This pin must be connected
together with pin SENSE
B
to power ground through a sensing power resistor.
30 RCOFF RC pin
RC network pin. A parallel RC network connected between this pin and
ground sets the current controller OFF-Time.
31 OUT
1
Power output Output half bridge 1.