Interrupt time for ePWM

Have a nice day for all!

1) There are microcontroller TMS320F28035PNS and part of program for it:

PWM period = 100kHz

#define   T_pwm_UPPV     300     //   10usec = 100kHz

EPwm2Regs.TBPRD = T_pwm_UPPV; // fpwm=1/(2 x TBPRD x TBCLK)
EPwm2Regs.TBPHS.half.TBPHS = 0x0000; // 
EPwm2Regs.TBCTR = 0x0000; // 

EALLOW;
PieVectTable.EPWM2_INT = &MainISR;
EDIS;

EPwm2Regs.ETPS.bit.INTPRD = 3;  // 3 x 10usec = 30usec

interrupt subprogram:

interrupt void MainISR(void)  //avery 30usec is interrupt

{

}

For it I use the bit  <INTPRD> which can get the next meanings:

00;  01;  10;  11  =>  min=10usec;  max=30usec

Questions:

I need to increase the interrupt time for  it happens more seldom from 30usec to 50usec.

How can I do it ???

What the bit and where I must set ???

I'm looking forward to hearing from you,

Thanks a lot,

Andrey