M63154AFP Renesas Electronics Corporation., M63154AFP Datasheet - Page 10
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M63154AFP
Manufacturer Part Number
M63154AFP
Description
3-phase Brushless Motor Driver
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M63154AFP.pdf
(16 pages)
M63154AFP
PWM Function Description
Chopping PWM control is applied to supply driving current to the motor in proportion to the analog-voltage input.
This IC detects the flow of current to the motor and the power supply continues to supply current until it reaches a level
specified in terms of the input voltage (current path 1). At that time, the output transistors are switched, and energy
stored in the coil regenerates current for a period determined by the internal off-timer circuit (current path 2). When the
timer reaches the specified value, the power supply again starts to supply current. Operation proceeds through repetition
of these phases.
[ FORWARD Current path timing 1.]
[ FORWARD Current path timing 2.]
Vcc
Vcc
R
RS
R
RS
RS
RS
Current path1
OUTPUT-B
OUTPUT- A
OUTPUT- B
OUTPUT- A
GND
GND
Current path 2
Current
path 1
Control value
Current
path 2
Control value
(Vcc-VRS)
Io=
Motor current
R
RS
Off time
Time
Rev.1.0, Sep.16.2003, page 10 of 15