PD16814_15 Datasheet, PDF (10/14 Pages) Renesas Technology Corp – MONOLITHIC DUAL H BRIDGE DRIVER CIRCUIT

µPD16814
NOTES ON PWM DRIVING CONTROL
Keep in mind the following points when executing PWM.
• Be sure to input the signals to control PWM driving from IN2 and IN4.
• Because the logic of the PWM driving control inputs (IN2 and IN4) to create the Brake status is inverted depending
on whether the Forward or Reverse mode is used, care must be exercised when PWM driving is controlled at
a duty factor other than 50%.
Example 1 PWM driving in Forward mode
IN1/IN3
IN2/IN4
FB FBFB FBFB F
Correct
Example 2 PWM driving in Reverse mode
IN1/IN3
IN2/IN4
FB FBFB FBFB F
Incorrect
IN1/IN3
IN1/IN3
IN2/IN4
RB RBRB RBRB R
IN2/IN4
RB RBRB RBRB R
Correct
Incorrect
Remark This is because noise may be output due to the configuration of the internal circuit.
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