M63154AFP Renesas Electronics Corporation., M63154AFP Datasheet - Page 14

• Manufacturer Part Number: M63154AFP
• Description: 3-phase Brushless Motor Driver
• Manufacturer: Renesas Electronics Corporation.

M63154AFP
Timing Chart of Voltages on Individual Pins in PWM Control
The current from the RS pin is detected at the FLT pin. This current reaching a value specified by the voltage on the
VCTL pin indicates full discharge. After charging, the voltage on the OSCC pin (pin 23) sets the off-period for PWM
current-chopping control.
Whenever a Hall input switches polarity, the voltage on the OSCC pin is temporarily reset to 0 V. While the voltage on
the OSCC pin is 0.9 V or less, the PWM waveforms are off (regenerative operation). Otherwise, PWM waveforms are
on.
The above timing chart shows the timing with which outputs for the motor are switched on and off during PWM
control. Timing for the switching of outputs in response to Hall input varies with the setting of the B1 pin.
Rev.1.0, Sep.16.2003, page 14 of 15
Hall input
Output voltage
Output current
voltage
OSCC output
voltage
Hu+
Hu-
Hv-
Hv+
Hw+
Hw-
U
V
W
U
V
W