Datasheet

DocID022729 Rev 3 17/70
L6472 Pin connection
70
Pin list
Table 6. Pin description
No. Name Type Function
17 VDD Power Logic output supply voltage (pull-up reference)
6 VREG Power
Internal 3 V voltage regulator output and 3.3 V external logic
supply
7 OSCIN Analog input
Oscillator pin 1. To connect an external oscillator or clock source.
If this pin is unused, it should be left floating.
8 OSCOUT Analog output
Oscillator pin 2. To connect an external oscillator. When the
internal oscillator is used this pin can supply 2/4/8/16 MHz. If this
pin is unused, it should be left floating.
10 CP Output Charge pump oscillator output
11 Vboot Supply voltage
Bootstrap voltage needed for driving the high-side power DMOS
of both bridges (A and B).
5 ADCIN Analog input Internal analog-to-digital converter input
2
VSA Power supply Full bridge A power supply pin. It must be connected to VSB.
26
12
VSB Power supply Full bridge B power supply pin. It must be connected to VSA.
16
27
PGND Ground Power ground pin
13
1 OUT1A Power output Full bridge A output 1
28 OUT2A Power output Full bridge A output 2
14 OUT1B Power output Full bridge B output 1
15 OUT2B Power output Full bridge B output 2
9 AGND Ground Analog ground.
4 SW Logical input
External switch input pin. If not used the pin should be connected
to VDD.
21 DGND Ground Digital ground
22 BUSY
\SYNC Open drain output
By default, this BUSY pin is forced low when the device is
performing a command. Otherwise the pin can be configured to
generate a synchronization signal.
18 SDO Logic output Data output pin for serial interface
20 SDI Logic input Data input pin for serial interface
19 CK Logic input Serial interface clock
23 CS
Logic input Chip select input pin for serial interface
24 FLAG Open drain output
Status flag pin. An internal open drain transistor can pull the pin to
GND when a programmed alarm condition occurs (step loss,
OCD, thermal pre-warning or shutdown, UVLO, wrong command,
non-performable command).