General Description

The Supertex HV9910DB6 is a simple, constant-current, LED driver evaluation board designed to drive OSRAM’s 6-chip or 4-chip OSTAR™ from a 24V supply. The board uses the Supertex HV9910B in a buck confi guration in a constant off-time mode. The peak current control scheme enables fairly accurate control of the LED current with a very simple control scheme and a low part count. The information in this datasheet also applies to the demoboards which have the Supertex HV9910.

Connections

1.Connect the input voltage source between VIN and GND as shown.

2.Connect the LED load between VO+ and VO- as shown (anode to VO+ and cathode to VO-).