The best replacement for pwm is mppt.

The best alternatives to pwm are rated as following:
★★★★★  mppt
★★★  3 pin
★★★  ppm
★★  flx
★★  pfm
★★  non pwm
★★  mppt controller
★★  analog dimming
★  pcm
★  duty cycle
★  can
★  mppt charge controllers
★  scr
★  dac
★  pdm
★  voltage fan
  vfd
  pwk
  mppt charge controller
  pll
  voltage fan control
  igbt
  voltage control
  pid
  mppt solar controller
  svm
  randomized pwm

Your alternative for pwm is not listed? Suggest!
Speaking about pwm, one probably shouldn't forget about 555.

Other search terms related to pwm and their ratings are:
★★★★★ 555
★★ 555 timer
★★ mosfet
★★ shift register
★ h bridge
★ 8051
★ ssr
★ current limit
★ pic microcontroller
★ msp430
★ microcontroller
★ current limiter
igbt
dc motor
You have in mind a companion for pwm and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of pwm in all years. Click on graph for more.
pwm
mppt
3 pin