L6228Q View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6228Q' PDF : 32 Pages View PDF
Pin connection
L6228Q
Table 4.
N°
Pin description
Pin
Type
Function
1, 21
GND
GND Ground terminals
9
OUT1B Power output Bridge B output 1
11
RCB
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.
12
SENSEB
Power supply
Bridge B source pin. This pin must be connected to power ground through a
sensing power resistor.
13
VREFB
Analog input
Bridge B current controller reference voltage. Do not leave this pin open or
connected to GND.
Step mode selector. HIGH logic level sets HALF-STEP mode, LOW logic level
14 HALF/FULL Logic input sets FULL-STEP mode.
If not used, it has to be connected to GND or + 5 V.
Decay mode selector. HIGH logic level sets SLOW DECAY mode. LOW logic
15 CONTROL Logic input level sets FAST DECAY mode.
If not used, it has to be connected to GND or + 5 V.
Chip enable. LOW logic level switches OFF all power MOSFETs of both
16
EN
Logic input(1)
bridge A and bridge B. This pin is also connected to the collector of the
overcurrent and thermal protection to implement overcurrent protection.
If not used, it has to be connected to +5 V through a resistor.
17
VBOOT
Supply
voltage
Bootstrap voltage needed to drive the upper power MOSFETs of both bridge
A and bridge B.
19
OUT2B Power output Bridge B output 2.
20
VSB
Power supply
Bridge B power supply voltage. It must be connected to the supply voltage
together with pin VSA
22
VSA
Power supply
Bridge A power supply voltage. It must be connected to the supply voltage
together with pin VSB
23
OUT2A Power output Bridge A output 2.
24
VCP
Output Charge pump oscillator output.
Reset pin. LOW logic level restores the home state (state 1) on the phase
25
RESET Logic input sequence generator state machine.
If not used, it has to be connected to +5 V.
26
VREFA
Analog Input
Bridge A current controller reference voltage. Do not leave this pin open or
connected to GND.
27
CLOCK Logic input Step clock input. The state machine makes one step on each rising edge.
Selects the direction of the rotation. HIGH logic level sets clockwise direction,
28 CW/CCW Logic input whereas LOW logic level sets counterclockwise direction. If not used, it has to
be connected to GND or +5 V.
29
SENSEA
Power supply
Bridge A source pin. This pin must be connected to power ground through a
sensing power resistor.
30
RCA
RC pin
RC network pin. A parallel RC network connected between this pin and
ground sets the current controller off-time of the bridge A.
31
OUT1A Power output Bridge A output 1
1. Also connected to 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 from 2.2 kΩ to180 kΩ, recommended 100 kΩ.
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Doc ID 14321 Rev 5
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