rev. page date description: dc-dc converter 1 of 4 06/2009 20050 sw 112 th ave. tualatin, oregon 97062 p h o n e phone 503.612.2300 f a x fax 503.612.2382 part number: ptk25 features industry standard pin out wide 2:1 input range fully isolated output voltage trimmable output on/off control over-current protection over-voltage protection six-sided emi shielding constant switching frequency high efficiency compact size 2.0x2.0x0.4 -40c~85c models available 3 year warranty note: 1. all models are also available in an extended temperature range of -40c~85c. for these models, append m to the model numb er, e.g. ptk25-q48-s5m. 2. ripple & noise measured with a 20mhz bandwidth, off a 10uf electrolytic and a 0.1uf ceramic cap in parallel at the ouptut. model 1 output input output output ripple & noise 2 efficiency power voltage voltage current mv p-p (typ.) (max) (max) ptk25-d24-s3 19.8w 18-36vdc 3.3vdc 6.0a 100 80% ptk25-d24-s5 25.0w 18-36vdc 5vdc 5.0a 100 85% ptk25-d24-s12 24.0w 18-36vdc 12vdc 2.0a 120 89% ptk25-d24-s15 24.0w 18-36vdc 15vdc 1.6a 150 89% ptk25-d24-d5 25.0w 18-36vdc 5vdc 2.5a 75/75 84% ptk25-d24-d12 24.0w 18-36vdc 12vdc 1.0a 120/120 88% ptk25-d24-d15 24.0w 18-36vdc 15vdc 0.8a 150/150 87% ptk25-d24-t312 19.95w 18-36vdc 3.3vdc/12vdc 3.5a/0.35a 75/120/120 83% ptk25-d24-t512 25.9w 18-36vdc 5vdc/12vdc 3.5a/0.35a 75/120/120 84% ptk25-d24-t315 19.95w 18-36vdc 3.3vdc/15vdc 3.5a/0.28a 75/150/150 83% ptk25-d24-t515 25.0w 18-36vdc 5vdc/15vdc 3.5a/0.25a 75/150/150 84% ptk25-d48-s3 19.8w 36-72vdc 3.3vdc 6.0a 100 81% ptk25-d48-s5 25.0w 36-72vdc 5vdc 5.0a 100 85% PTK25-D48-S12 24.0w 36-72vdc 12vdc 2.0a 120 89% ptk25-d48-s15 24.0w 36-72vdc 15vdc 1.6a 150 89% ptk25-d48-d5 25.0w 36-72vdc 5vdc 2.5a 75/75 84% ptk25-d48-d12 24.0w 36-72vdc 12vdc 1.0a 120/120 88% ptk25-d48-d15 24.0w 36-72vdc 15vdc 0.8a 150/150 87% ptk25-d48-t312 19.95w 36-72vdc 3.3vdc/12vdc 3.5a/0.35a 75/120/120 83% ptk25-d48-t512 25.9w 36-72vdc 5vdc/12vdc 3.5a/0.35a 75/120/120 84% ptk25-d48-t315 19.95w 36-72vdc 3.3vdc/15vdc 3.5a/0.28a 75/150/150 83% ptk25-d48-t515 25.0w 36-72vdc 5vdc/15vdc 3.5a/0.25a 75/150/150 84%
rev. page date description: dc-dc converter 2 of 4 06/2009 20050 sw 112 th ave. tualatin, oregon 97062 p h o n e phone 503.612.2300 f a x fax 503.612.2382 part number: ptk25 input parameter conditions/description min nom max units input voltage range 18 24 36 vdc 36 48 72 vdc remote on/off control output turn-on 3 2.5v (open) 5.5v output turn-off 0v (short) 0.8v switching frequency constant 300 khz note: 3 output defaults to on when there is no connection to the cnt pin. output parameter conditions/description min nom max units output trim range with external trim resistors -5% +5% set point accuracy single output -2% +2% dual output -3% +3% line regulation single output models -0.25% +0.25% (low line to high line) dual output models -2.5% +2.5% triple: main output (vout) -0.25% +0.25% auxillary outputs (+vaux / -vaux) -5% +5% load regulation single output models- no load to full load -0.25% +0.25% dual output models- balanced loads -2.5% +2.5% triple: main output (vout) -0.25% +0.25% auxillary outputs (+vaux / -vaux)- with 10% -5% +5% load on vout and balanced loads on+vaux and -vaux minimum load converters will not be damaged if loading conditions are less than minimum specified loads, but regulation specs may not be met 4 ripple and noise see chart note : 4 single output: no min. load required, dual: 10%, triple: balanced loads protection parameter conditions/description min nom max units over-current continuous auto recovery 5 105% 135% over-voltage internally zener clamped 5 110% 140% note : 5 continuous operation in a protected state may compromise long-term reliability. general parameter conditions/description min nom max units efficiency typical at full load 77% 83% isolation voltage input/case, input/output, output/case 500 vac insulation resistance at 500 vdc 100m ohms agency standards approved to ul60950(e222889), csa c22.2 no. 60950, tuv en60950 (single output only) case material zn material flammability 94 v-0 weight 80 grams (2.82) (ounces) mtbf mil-hdbk-217f 470k hours operating temperature regular models - see derating curve. -20 +71 c extended temperature models -40 +85 c storage temperature -40 +105 c humidity operating (non-condensing) 5% 95% rh washability not intended for aqueous wash
rev. page date description: dc-dc converter 3 of 4 06/2009 20050 sw 112 th ave. tualatin, oregon 97062 p h o n e phone 503.612.2300 f a x fax 503.612.2382 part number: ptk25 notes 1. all dimensions are in inches and(mm). 2. weight : 75g or less * mounting hole top view 0.30.5 (7.5) pcb layout dimensions (mm) pin definitions derating curves
rev. page date description: dc-dc converter 4 of 4 06/2009 20050 sw 112 th ave. tualatin, oregon 97062 p h o n e phone 503.612.2300 f a x fax 503.612.2382 part number: ptk25 application notes 1. output trimming the output voltages are preset to nominal values as indicated by the models table at the factory. if desired, the output volta ge may optionally be trimmed to a different value (+/- 10%) with external resistors and/or potentiometer as shown below. to trim the output voltage with fixed resistors, the output voltage can be calculated as follows. trim-up trim-down figure 2: trim-up voltage setup figure 3: trim-down voltage setup the value of r trim-up is defined as: the value of r trim-down is defined as: where: r trim-up is the external resistor in k . v o is the where: r trim-down is the external resistor in k . v o is the desired output voltage. r 1 and r 2 and v r are internal to desired output voltage. r 1 and r 2 and v r are internal to the unit and are defined in table 1. for example to trim up the unit and are defined in table 1. for example to trim down the ptk25-d5-d12 up by 5% to 25.2 v, r trim-up is calculated the ptk25-d5-d12 down by 5% to 22.8 v, r trim-down is calculated as follows: as follows: r load 10k w trimpot +vin -vin -vo trim +vo figure 1. trimming with external potentiometer 2.5 2.5 2.5 2.5 2.5 2.5 1.25 vr (v) 2.43 2.43 2.43 2.4 2.43 2.43 0.68 r2 (k ) model ptk25-dxx-d15 ptk25-dxx-d12 ptk25-dxx-d5 ptk25-dxx-s15 ptk25-dxx-s12 ptk25-dxx-s5 ptk25-dxx-s3.3 26.7 21 7.32 12.1 9.31 2.43 1.13 r1 (k ) table 1 r load r trim-up +vin -vin +vo trim -vo r load r trim-down +vin -vin +vo trim -vo v o = 25.2 / r 1 = 21 k / r 2 = 2.43 k / v r = 2.5 = = r trim_up 47.94 k 2.43 (25.2 - 2.5) - 2.5 21 2.5 21 2.43 v o = 22.8 / r 1 = 21 k / r 2 = 2.43 k / v r = 2.5 = = r trim_down 326.68 k 2.5 - 2.1 (22.8 - 2.5) 2.43 (22.8 - 2.5) 21 2.43 = r trim_up r 2 (v o - v r ) - v r r 1 v r r 1 r 2 = r trim_down v r r 1 - (v o - v r ) r 2 (v o - v r ) r 1 r 2
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