If limiting the rise or fall times to the power device is the primary goal, then an external resistance is highly recommended between the output of the driver and the power device instead of adding delays on the input signal. This external resistor has the additional benefit of reducing part of the gate charge related power dissipation in the gate-driver device package and transferring the gate driver into the external resistor.
这个芯片手册说输出串联一个电阻可以改变导通速度，就是上升沿和下降沿，这个电阻是必须的吗，没有特殊要求接多大电阻，有没有推荐值。
