VLD24-500

rev. page date 1 of 4 1/2009 PART NUMBER: VLD24-XXX DESCRIPTION: constant current dc-dc converter applications The VLD24-XXX series is a step-down constant current source designed for driving high power LEDs. The available output currents are: 300mA, 350mA, 500mA, 600mA, 700mA. Despite its compact size, the VLD24-XXX series is fully featured with very high efficiency, wide input voltage range, high ambient operating temperature, and two means of LED dimming: PWM digital dimming and analog dimming control, via a trim POT. features • • • • • • • • power LED driver high efficiency up to 95% wide input voltage range constant current output PWM digital dimming short-circuit protection analog dimming output on/off control model VLD24-300 VLD24-350 VLD24-500 VLD24-600 VLD24-700 input range (V dc) 5.5~36 5.5~36 5.5~36 5.5~36 5.5~36 output voltage (V dc) 2~32 2~32 2~32 2~32 2~32 output current (mA) 0~300 0~350 0~500 0~600 0~700 dimming control PWM+analog PWM+analog PWM+analog PWM+analog PWM+analog efficiency (%) 95 95 95 95 95 INPUT parameter input voltage quiescent input current in off mode input filter conditions/description absolute max before device failure opperating input range Vin = 24V, V DIM < 0 .6V capacitor min 5.5 nom 24 max 40 36 400 units VDC VDC μA OUTPUT parameter voltage range current range current accuracy current stability temp. coefficient maximum capacitive load conditions/description Vin is at least 1.5~4V higher than Vout Vin-Vout > 1.5~4V 300~700mA Vin = 24V, Vout = 2~32V -40°C ~ 71°C ambient min 2 300 nom max 32 700 ±12 ±18 ±0.03 470 units VDC mA % % %/°C μF ±8 ±10 PROTECTION CIRCUIT parameter conditions/description short-circuit protection regulated at rated output current 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 phone fax rev. page date 2 of 4 1/2009 PART NUMBER: VLD24-XXX DESCRIPTION: constant current dc-dc converter DIMMING AND CONTROL parameter remote on/off remote pin current PWM frequency conditions/description dc-dc ON (Vr on pin3) dc-dc OFF Vr = 5V min nom max open or 2.8V