low cost, pwm control constant current output dc/dc led drivers key features: ? 300 - 700 ma output current ? constant current output ? pwm dimming ? wide 5.5v to 36v input range ? ef? ciency to 95% ? miniature case ? 4.7 mhrs mtbf ? low, low cost! series input parameter conditions min. typ. max. units input voltage range 5.5 24.0 36.0 vdc max input voltage see note 1 40.0 vdc input filter internal capacitor output parameter conditions min. typ. max. units output voltage range vin = 36v 2 32 vdc output current see model selection guide output current accuracy vin = 24v 5.0 8.0 % output current stability vin = 24v 5.0 10.0 % output capacitive load 470 f ef? ciency iout = 100% 95 % temperature coef? cient 0.03 %/ o c output short circuit regulated at rated output current environmental parameter conditions min. typ. max. units operating temperature range, ambient 300 ma, 350 ma output models -40 +25 +85 o c all other models -40 +25 +71 operating temperature range, case case +100 o c storage temperature range -55 +125 o c cooling free air convection humidity rh, non-condensing 95 % lead temperature 1.5 mm from case for 10 sec 260 oc physical case size 0.90 x 0.40 x 0.374 inches (22.80 x 10.20 x 9.50 mm) case material non-conductive black plastic (ul94-v0) weight 0.123 oz (3.5g) remote on/off control parameter conditions min. typ. max. units dc/dc on open 0r 2.8v < vcont <6.0v dc/dc off vcont <0.6v remote pin drive current vcont = 5.0v 1 ma quiescent input current (shutdown mode) vin = 24v, vcont = <0.6v 400 a pwm dimming parameter conditions min. typ. max. units operation frequency 0.2 10 khz reliability speci? cations parameter conditions min. typ. max. units mtbf mil hdbk 217f, 25 o c, gnd benign 2.0 mhours safety standards meets en 60950, iec 60950 micropower direct 292 page street suite d stoughton, ma 02072 usa t: (781) 344-8226 f: (781) 344-8481 e: sales@micropowerdirect.com w: www.micropowerdirect.com www.micropowerdirect.com electrical speci? cations speci cations typical @ +25?, nominal input voltage & rated output current, unless otherwise noted. speci cations subject to change without notice. s ld24e-xx-xxx www.datasheet.net/ datasheet pdf - http://www..co.kr/
speci? cation notes: 1. exceeding 40v on the unit input could damage the unit. 2. no connection should be made between input ground and the output. 3. these are step-down devices, the maximum output open voltage is equal to the input voltage. 4. the pwm/cont input (pin 3) should be left open if not used. 5. exceeding the speci ed maximum output power could cause damage to the unit. pwm output current control output current may be adjusted by using a pulse width modulated (pwm) signal. by vary- ing the signal duty cycle (as shown at right) the output current is adjusted up or down. output current may be calculated by the formula: where iout = required output current irated = full rated output current for the unit dpwm = duty cycle of the control signal out rated pwm i = i x d mechanical dimensions www.micropowerdirect.com micropower direct we power your success - for less! 292 page street ste d stoughton, ma 02072 ? tel: (781) 344-8226 ? fax: (781) 344-8481 ? e-mail: sales@micropowerdirect.com notes: all dimensions are typical in inches (mm) tolerance x.xx = ?.01 (?.25) pin 1 is marked by a ?ot or indentation on the top of the unit pin connections pin function 1+v in +dc supply 3 pwm pwm, on/off 4 gnd -dc supply 5-v out led cathode conn. 6 +vout led anode conn. connection notes: 1. in some noise sensitive applications, the addition of the input lter components (c 1 , l 1 & c 2 ) will help to reduce conducted emissions. 2. input gnd (pin 4) cannot be connected to the output. 3. if not being used, the pwm/control input (pin 3) should be left open. typical connection: parallel output typical connection: model number input output dimming control ef? ciency (%, max) voltage (vdc) voltage (vdc) current (ma) nominal range LD24E-07-300 24 5.5 - 36.0 2.0 - 32.0 0.0 - 300 pwm 95 ld24e-08-350 24 5.5 - 36.0 2.0 - 32.0 0.0 - 350 pwm 95 ld24e-12-500 24 5.5 - 36.0 2.0 - 32.0 0.0 - 500 pwm 95 ld24e-14-600 24 5.5 - 36.0 2.0 - 32.0 0.0 - 600 pwm 95 ld24e-17-700 24 5.5 - 36.0 2.0 - 32.0 0.0 - 700 pwm 95 model selection guide connection notes: 1. a positive temperature coef cient ptc is connected to each parallel channel for protection. www.datasheet.net/ datasheet pdf - http://www..co.kr/
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