Datasheet
DocID9453 Rev 2 7/32
L6227 Pin connections
32
Package
Name Type Function
SO24/
PowerDIP24
PowerSO36
Pin no. Pin no.
6, 7, 18, 19 1, 18, 19, 36 GND GND
Signal ground terminals. In PowerDIP and SO
packages, these pins are also used for heat dissipation
toward the PCB.
822OUT1
B
Power output Bridge B output 1.
924RC
B
RC pin
RC network pin. A parallel RC network connected
between this pin and ground sets the current controller
OFF-time of the bridge B.
10 25 SENSE
B
Power supply
Bridge B source pin. This pin must be connected to
power ground through a sensing power resistor.
11 26 IN1
B
Logic input Bridge B input 1
12 27 IN2
B
Logic input Bridge B input 2
13 28 VREF
B
Analog input
Bridge B current controller reference voltage.
Do not leave this pin open or connect to GND.
14 29 EN
B
Logic input
(1)
Bridge B enable. LOW logic level switches OFF all
Power MOSFETs of bridge B. This pin is also
connected to the collector of the overcurrent and
thermal protection transistor to implement overcurrent
protection.
If not used, it has to be connected to +5 V through
a resistor.
15 30 VBOOT Supply voltage
Bootstrap voltage needed for driving the upper Power
MOSFETs of both bridge A and bridge B.
16 32 OUT2
B
Power output Bridge B output 2.
17 33 VS
B
Power supply
Bridge B power supply voltage. It must be connected to
the supply voltage together with pin VS
A
.
20 4 VS
A
Power supply
Bridge A power supply voltage. It must be connected to
the supply voltage together with pin VS
B
.
21 5 OUT2
A
Power output Bridge A output 2.
22 7 VCP Output Charge pump oscillator output.
23 8 EN
A
Logic input
(1)
Bridge A enable. LOW logic level switches OFF all
Power MOSFETs of bridge A. This pin is also
connected to the collector of the overcurrent and
thermal protection transistor to implement overcurrent
protection.
If not used, it has to be connected to +5 V through
a resistor.
24 9 VREF
A
Analog input
Bridge A current controller reference voltage.
Do not leave this pin open or connect to GND.
1. Also connected at the output drain of the overcurrent and thermal protection MOSFET. Therefore, it has to be driven putting
in series a resistor with a value in the range of 2.2 K - 180 K, recommended 100 K.
Table 4. Pin description (continued)