飞利浦路灯电源介绍.ppt

OEM Channel, Jun 2011 (China OEM) L E D D R I V E R S 32 Xitanium Outdoor Driver Programmer V1.3 ? The Xitanium Outdoor Driver Programmer is a PC application interface used to read and program settings of an LED driver. ? The programmer can adjust the following feature of driver – Adjustable Output Current (AOC) – DIMMING INTERFACE SELECTION – CONSTANT LUMEN OUTPUT (CLO) – Programme Lumistep (PLS) – NTC Temperature OEM Channel, Jun 2011 (China OEM) L E D D R I V E R S 33 OEM Channel, Jun 2011 (China OEM) L E D D R I V E R S 34 AOC Setting ? The nominal output current of the driver can be set to any value between 200mA to 700mA in increments of 1mA. This feature is known as Adjustable Output Current or AOC. The current can be set in one of two ways 1) Set the value using the programming interface. ? OR 2) Set using external resistor (RSET). The value of the external resistor determines the nominal output current. ? OEM Channel, Jun 2011 (China OEM) L E D D R I V E R S 35 DIMMING INTERFACE SELECTION OEM Channel, Jun 2011 (China OEM) L E D D R I V E R S 36 CONSTANT LUMEN OUTPUT ? The plot of reduction in lumen output of LED over life may be calculated or provided by the LED manufacturer. With this information, the driver output current over life may be compensated such that Constant Lumen Output (CLO) can be achieved from the driver-LED module system. 0 20 40 60 80 100 120 0 10000 20000 30000 40000 50000 60000 L E D l u m e n o u t p u t ( % ) LED module life (hours) Example: LED lumen output (%) versus lifetime (hours) OEM Channel, Jun 2011 (China OEM) L E D D R I V E R S 37 CONSTANT LUMEN OUTPUT ? Driver target nominal output current = CLO percentage * Adjustable Output Current (AOC) OEM Channel, Jun 2011 (China OEM) L E D D R I V E R S 38 CONSTANT LUMEN OUTPUT Output current = CLO percentage * Adjustable Output Current (AOC) 0 20 40 60 80 100 120 0 10000 20000 30000 40000 50000 60000 L