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L6227Q датащи(PDF) 6 Page - STMicroelectronics

номер детали L6227Q
подробное описание детали  DMOS dual full bridge driver with PWM current controller
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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Pin connection
L6227Q
6/27
Table 4.
Pin description
Pin
Type
Function
1, 21
GND
GND
Signal ground terminals.
9OUT1B
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
IN1B
Logic input
Bridge B input 1
14
IN2B
Logic input
Bridge B input 2
15
VREFB
Analog input
Bridge B current controller reference voltage.
Do not leave this pin open or connect to GND.
16
ENB
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.
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.
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.
25
ENA
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.
If not used, it has to be connected to +5 V through a resistor.
26
VREFA
Analog input
Bridge A current controller reference voltage.
Do not leave this pin open or connect to GND.
27
IN1A
Logic input
Bridge A logic input 1.
28
IN2A
Logic input
Bridge A logic input 2.
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 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
Ω - 180 kΩ, recommended 100 kΩ.


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