dcdc specification led driver ? constant current output ? led drive current up to 1000 ma ? led strings from 2 v to 14 v ? pwm & analog dimming control ? high efficiency up to 93% ? open or short circuit led protection ? 3 year warranty ldu05/07/14 series input input voltage ? 7-16 vdc input filter ? capacitor input surge ? 20 vdc for 0.5 s output output voltage ? see tables (vin must be at least 2 v greater than vout) output current ? see tables output current trim ? 25-100% output current ? see tables accuracy ripple & noise ? see tables, measured with 20 mhz bandwidth short circuit protection ? current is limited to the rated output temperature ? 0.03%/c max coefficient remote on/off ? on = 0.3-1.25 v or open circuit off = 0.15 v (applied to control pin) quiescent input current is 25 a max, remote on/off signal ? 1 ma max current dimming pwm output current range ? 25% to 100% operating frequency ? 1 khz max on time ? 200 ns min off time ? 200 ns min amplitude ? 1.25 v max dc voltage control output current range ? 25% to 100% control input ? 0.3 to 1.25 v max variable resistor output current range ? 25% to 100% xppower.com general efficiency ? see tables switching frequency ? ldu05: 60-300 khz variable ldu07: 120-350 khz variable ldu14: 90-400 khz variable mtbf ? >3.3 mhrs to mil-hdbk-217f at 25 c, gb environmental operating temperature ? -40 c to +85 c except ldu14 1000 ma unit: -40 c to +70 c, storage temperature ? -40 c to +125 c humidity ? up to 95%, non-condensing thermal impedance ? 35 c/w model dependant emc emissions ? en55022 class b conducted & radiated with external components - see application notes esd immunity ? en61000-4-2, level 2 perf criteria a radiated immunity ? en61000-4-3, level 2 perf criteria a eft/burst ? en61000-4-4, level 2 perf criteria a surge ? en61000-4-5, level 2 perf criteria a conducted immunity ? en61000-4-6, level 2 perf criteria a
14-mar-12 dcdc ldu05/07/14 mechanical details application notes 12.70 (0.50) 1 0.16 (0.40) ( 7 .62 ( 0.30) bottom view 2.54 (0.10) 0.50 (0.02) 7 .62 (0.30) 0.50 (0.02) 6.85 (0.27) 3.05 0.12) pin size is 0.5 mm (0.02) dia 14 85 7 pin connections 1 +v input +dc supply 4 +v output led anode connection 5 -v output led cathode connection 7 v adj dimming control 8 -v input -dc supply models and ratings output power input voltage range output voltage output ripple & noise output current output current accuracy efficiency model number 4.2 w 7-16 v 2-14 v 120 mv 300 ma 5% 93% ldu0516s300 4.9 w 7-16 v 2-14 v 150 mv 350 ma 6% 93% ldu0516s350 7.0 w 7-16 v 2-14 v 200 mv 500 ma 7% 93% LDU0716S500 8.4 w 7-16 v 2-14 v 200 mv 600 ma 7% 93% ldu1416s600 9.8 w 7-16 v 2-14 v 250 mv 700 ma 7% 93% ldu1416s700 14.0 w 7-16 v 2-14 v 250 mv 1000 ma 8% 93% ldu1416s1000 with dimming control 1. all dimensions are in inches (mm) 2. weight: 0.003 lbs (1.8 g) approx. 3. pin diameter: 0.020.002 (0.50.05) 4. pin pitch tolerance: 0.014 (0.35) 5. case tolerance: 0.02 (0.5) notes + - + - +vout - vout c2 c1 l1 ldu input filter to meet class b conducted emissions c1 10 f c2 4.7 f l1 68 h output current adjustment by variable resistor by connecting a variable resistor between control and gnd, simple dimming can be achieved. capacitor c is optional for hf noise rejection, recommended value is 0.22 f. shorting out the control pin to gnd will turn the output off. the output current can be determined using the equation: where the value of r is between 0 and 2 m ? , the maximum adjustment range of output current is 25% to 90% (for vin-vout <20 vdc) iout = rated max i x r (r + 200 k) +vout - vout control ldu -vin rc output current adjustment by dc voltage ldu control +vout -vout + -vin the output current is given by: control voltage range: 0.3 v to 1.25 vdc iout nom = rated max i x control voltage 1.25 ldu +vout - vout -vin gnd pwm 0v 5.0v control output current adjustment by pwm a pulse width modulated ( pwm ) signal with duty cycle d pwm can be applied to the control pin. the output current can be determined using the equation : iout = rated max i x dpwm dpwm = pwm duty cycle a control voltage lower than 0.15 v will turn the output off
|
