General Description
The HV9911 is a current mode control LED driver IC designed to control single switch PWM converters (buck, boost or buck-boost), in a constant frequency or constant off-time mode. The controller uses a peak current 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 high side output current can be sensed by using the HV7800).

FEATUREs
 Switch mode controller for single switch drivers
  o Buck
  o Boost
  o Buck-boost
 Works with high side current sensing
 Closed loop control of output current
 High PWM dimming ratio
 Internal 9 to 250V linear regulator (can be extended using external zener diodes)
 Internal 2% Voltage Reference (-40°C  Constant frequency or constant off-time operation
 Programmable slope compensation
 Enable & PWM dimming
 +0.25A/-0.5A gate drive (VDD = 10V)
 Output short circuit protection
 Output over voltage protection
 Synchronization capability
 Programmable MOSFET current limit
 Soft start

APPLICATIONs
 RGB backlight applications
 Automotive LED driver application
 Battery Powered LED lamps
 Other DC/DC LED drivers