L6227Q(2008) 데이터 시트보기 (PDF) - STMicroelectronics
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L6227Q Datasheet PDF : 27 Pages
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Pin connection
L6227Q
Table 4.
N°
Pin description
Pin
Type
Function
1, 21
GND
GND Signal 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
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.
Bridge B enable. LOW logic level switches OFF all power MOSFETs of bridge
16
ENB
Logic input (1)
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.
Bridge A enable. LOW logic level switches OFF all power MOSFETs of bridge
25
ENA
Logic input (1)
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 kΩ - 180 kΩ, recommended 100 kΩ.
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