General Description
The  HV9912  is  a  current  mode  control  LED  driver  IC  designed to control single switch PWM converters (buck, boost, buck-boost or SEPIC) in a constant frequency mode. The controller uses a peak  current-mode  control  scheme  with  programmable  slope compensation and includes an internal transconductance amplifier
to control the output current in closed loop enabling high output current accuracy (in the case of buck and buck-boost converters, the output current can be sensed using a high side current sensor like the HV7800).

FEATUREs
Switch mode controller for single switch
drivers
  ♦Buck
  ♦Boost
  ♦Buck-boost and SEPIC
Works with high side current sensors
Closed loop control of output current
High PWM dimming ratio
Internal 90V linear regulator (can be extended using external Zener diodes)
Internal 2% voltage reference
  (0°C < TA< 85°C)
Constant frequency operation
Programmable slope compensation
Linear & PWM dimming
+0.2A/-0.4A gate drive
Hiccup mode protection for both short circuit and open circuit conditions
Synchronization capability
Pin compatible with HV9911

Applications
LED backlight applications
General LED lighting applications
Battery powered LED lamps