STMicroelectronics Demonstration board using a dual full-bridge L6227Q EVAL6227QR EVAL6227QR Hoja De Datos
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EVAL6227QR
Pin connection
L6227Q
6/27
Table 4.
Pin description
N°
Pin
Type
Function
1, 21
GND
GND
Signal ground terminals.
9
OUT1
B
Power output Bridge B output 1.
11
RC
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.
ground sets the current controller OFF-time of the bridge B.
12
SENSE
B
Power supply
Bridge B source pin. This pin must be connected to power ground through a
sensing power resistor.
sensing power resistor.
13
IN1
B
Logic input
Bridge B input 1
14
IN2
B
Logic input
Bridge B input 2
15
VREF
B
Analog input
Bridge B current controller reference voltage.
Do not leave this pin open or connect to GND.
Do not leave this pin open or connect to GND.
16
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 over current protection.
B. This pin is also connected to the collector of the overcurrent and thermal
protection transistor to implement over current protection.
If not used, it has to be connected to +5 V through a resistor.
17
VBOOT
Supply
voltage
Bootstrap voltage needed for driving the upper power MOSFETs of both
bridge A and Bridge B.
bridge A and Bridge B.
19
OUT2
B
Power output Bridge B output 2.
20
VS
B
Power supply
Bridge B power supply voltage. It must be connected to the supply voltage
together with pin VS
together with pin VS
A
.
22
VS
A
Power supply
Bridge A power supply voltage. It must be connected to the supply voltage
together with pin VS
together with pin VS
B
.
23
OUT2
A
Power output Bridge A output 2.
24
VCP
Output
Charge pump oscillator output.
25
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 over current protection.
A. This pin is also connected to the collector of the overcurrent and thermal
protection transistor to implement over current protection.
If not used, it has to be connected to +5 V through a resistor.
26
VREF
A
Analog input
Bridge A current controller reference voltage.
Do not leave this pin open or connect to GND.
Do not leave this pin open or connect to GND.
27
IN1
A
Logic input
Bridge A logic input 1.
28
IN2
A
Logic input
Bridge A logic input 2.
29
SENSE
A
Power supply
Bridge A source pin. This pin must be connected to power ground through a
sensing power resistor.
sensing power resistor.
30
RC
A
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.
ground sets the current controller OFF-time of the bridge A.
31
OUT1
A
Power output Bridge A output 1.
1.
Also connected at the output drain of the over current 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
putting in series a resistor with a value in the range of 2.2 k
Ω - 180 kΩ, recommended 100 kΩ.