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L99MH98 bảng dữ liệu(PDF) 133 Page - STMicroelectronics

tên linh kiện L99MH98
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L99MH98 bảng dữ liệu(HTML) 133 Page - STMicroelectronics

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The L99MH98 also allows the classic current measurement system through a sensing resistor connected to the
low side sources of an H-bridge. In this case, one of the pins of the resistor, the one connected to the low side
sources, must be connected to the SHx pin of one of the other half bridges and the second pin of the resistor to
the SL pin of L99MH98 (see the Figure 43).
Figure 43. Driving 3 DC motors: one current measurement via shunt resistor + 2 indirect current
measurement
M
VDD
EN
2x
2x
2x
2x
GH1
/2
SH1
/2
GL1
/2
GH3/4
SH3/4
GL3/4
GH5
/6
SH5
/6
GL5
/6
GH7/8
SH7/8
GL7/8
CPC1N
CPC2P
CPC2N
CSN
SCLK
SDO
SDI
SL
PWM1
PWM2
PWM3
CSO1
CSO2
DIODE3
DIODE4
DIODE1
DIODE2
CP
CP
CP
GND
M
M
VDH
µC (input)
µC (output)
µC (output)
µC (output)
µC (input)
VProtected
VBAT
10k
VProtected
µC (input)
VS
SH1
SH2
SH3
SH4
SH5
SH6
SH7
SH8
SL
VProtected
VProtected
GND
DIODE1
GND
DIODE2
GND
DIODE3
VDH
VDH
VProtected
DIAGN
SPI interface
to
watchdog
Driver
interface,
logic and
diagnostics
Charge
pump
PWMx
controller
sample and hold
Muxer
and
Current
generator
and
ADC
L99MH98
Application examples
DS14611 - Rev 3
page 133/147



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