ro associates, inc. sunnyvale, ca 408 744-1450 fax:408 744-1521 email:sales@roassoc.com ? 40a dc-dc converter model: qv24-1.8-40-1 advance data sheet ? input: 18 ? 36vdc ? output: 1.8vdc @ 40a features ? 40a output current ? standard quarter brick package ? ultra-high efficiency: 88% ? fast transient response ? extended thermal performance ? no heat sink required ? light weight ? smt version available ? recovers automatically from all protection modes ? trim range: 80 to 110% ? remote sense ? constant frequency ? meets basic insulation requirements of en60950 see last page for available options efficiency efficiency (%) 70 72 74 76 78 80 82 84 86 88 90 0 5 10 15 20 25 30 35 40 (24vin) load current (amps) description the quattroverter qv24-1.8-40-1 is a member of ro?s second generation of quarter-brick modules. this improved series of converters pushes the performance envelope to ultra-high levels, with this model producing 40a of 1.8v power at an astonishing 87% efficiency. the minimal power loss performance is maintained across the load range and is complimented by advanced thermal management and packaging techniques. this combination of performance and packaging makes reliable operation at high currents possible without the use of a heat sink. the quattroverter family of modules is available in both thru-hole and surface mount versions. an evaluation board is available
quattroverter ? dc-dc converters model: qv24-1.8-40-1 ro associates, inc. sunnyvale, ca 408 744-1450 fax:408 744-1521 email:sales@roassoc.com absolute maximum ratings parameter min max units conditions continuous input voltage (+in to ?in) -0.3 36 vdc transient input voltage (+in to ?in) -0.3 40 vdc up to 100ms on/off voltage (on/off to ?in) -0.3 40 vdc storage temperature -40 +125 c operating temperature -40 +85 c ambient soldering temperature (wave solder) +260 c < 5 sec. specifications input parameters min typ max units conditions input voltage 18 24 36 vdc startup voltage 15.5 16 16.5 vdc shut down voltage 14 14.5 15 vdc maximum input current tbd a v in = 18v output parameters min typ max units conditions voltage set point 1.77 1.8 1.83 vdc 24v in , full load load regulation 1 4 mv 0 a to full load, at any v in within range line regulation 1 4 mv over v in range voltage drift w/temperature 0.02 %/c -40 to +100 c ripple 75 150 mv p-p 5hz to 20 mhz, at any v in within range, c ext = 10f tantalum + 1f ceramic rated current 0 40 a current limit inception 110 120 133 % f.l. v out = 95% v out nominal short circuit current 170 % f.l. v out = 250mv transient response peak deviation settling time 90 100 mv sec load change from 50% to 75% full load slew rate = 1a/sec v out within 1% v out nominal external load capacitance 0 30,000 f efficiency (see curve) 88 % 24v in , 3/4 load specifications apply with 24vin, full load, 25c unless indicated otherwise. exceeding absolute maximum ratings may cause permanent damage and may reduce reliability
quattroverter ? dc-dc converters model: qv24-1.8-40-1 ro associates, inc. sunnyvale, ca 408 744-1450 fax:408 744-1521 email:sales@roassoc.com specifications (continued) isolation parameters min typ max units conditions input/output isolation 1500 vdc input-to-output capacitance 50 pf input-to-output resistance 10 m ohms mechanical parameters min typ max units conditions weight 35 (1.24) g (oz.) size 2.3 x 1.45 x 0.42 inches feature parameters min typ max units conditions trim range -20 +10 % over voltage protection (non- shutdown, auto. recovery) 115 120 140 % v out (nom) ovp threshold does not change when vo is trimmed over temperature shut-down (automatic recovery) 120 c pcb temperature turn-on time 12 20 msec 80% f.l., v out within 1% logic on/off logic low 0.5 v v out = 0 on/off source current 2 ma @v on/off < 0.5v logic high 15 v on/off sink current 50 a @v on/off = 15v logic turn-on time 2 msec 80% f.l., v out settled within 1% trim circuit configurations trim resistor calculations (standard trim) ? ? ? ? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ? ? ? ? + + + + ? ?? ? ? ?? ? = = = = ? ? ? ? k 2 10 511 225 1 100 v 11 5 r o up trim . % % . %) ( . ? ? ? ? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? = = = = ? ? ? ? k 2 10 511 r dn trim . % +out +sense trim -sense -out trim-up load r trim-up +out +sense trim -sense -out trim-down load r trim-dn where: vo = the nominal output voltage of the module with no trimming. ? ? ? ? % = the desired percentage change in the output ( ? ? ? ? % is always a positive number).
quattroverter ? dc-dc converters model: qv24-1.8-40-1 ro associates, inc. www.roassoc.com 800-443-1450 p.o.box 61419 rev 030818 408 744-1450 sunnyvale, ca 94088 email:sales@roassoc.com fax: 408 744-1521 input characteristics output characteristics input current (amps) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 0 5 10 15 20 25 30 35 output voltage (volts) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 5 10 15 20 25 30 35 40 45 50 55 input voltage (volts) output current (amps) transient response outline drawing iout = 20a ? 30a ?20a current slew rate = 1a/s part numbering scheme converter family v in (nom) v out (nom) i o (rated) logic options pin options qv 24 - 1.8 - 40 - 1 quattroverter series 24v nom. 18v - 36v 1.8v output 40a rating blank = 1 = pos. logic neg. logic (std.) blank = 6 = 0.200 pth (std.) 0.145 pth available options 8 = smt = 0.110 pth smt option negative logic ? the on/off pin must be low to turn the module on. if it?s left floating, the module turns off. this is the standard logic configuration. positive logic ? the on/off pin must be high to turn the module on. if it?s left floating, the module turns on. alternate pin lengths ? in addition to the 0.200? standard thru-hole pins, ro offers 0.145?, and 0.110? thru-hole pin lengths. smt mounting ? the module is mounted to the target pcb using a surface-mount interface. contact the factory for further information. alternate trim ? other industry standard trim options are available. contact the factory for further information. (minimum quantities and extended lead-times may apply to orders of non-standard options) 100mv/div 100sec/div qv24-1.8-40-1 full load x.xxx in. 0.010 in. [x.xx mm. 0.25 mm.] x.xx in. 0.02 in. [x.x mm. 0.5 mm.] tolerances unless specified otherwise: 0.150 [3.81] all dimensions are in * other pin lengths available 0.200 * [5.080] 0.040 [1.02] ? pin 0.070 [1.778] ? standoff 6 pl. inches [millimeters] 0.300 [7.62] 0.600 [15.24] 1.45 [36.8] 0.430 [10.92] 2.00 [50.8] pins farside on/ off -vin +vin t -vout -s +vout +s 2.30 [58.4] 0.060 [1.52] ? pin 0.090 [2.286] ? standoff 2 pl. 0.42 [10.9] 0.600 [15.24] 0.450 [11.43] 0.300 [7.62]
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