providing interface between low-level logic and power loads, the udk/udn/UDQ2547b and udk/udn/UDQ2547eb quad power drivers combine logic gates and high-current bipolar outputs with complete output protection. each of the four outputs will sink 600 ma in the on state. the outputs have a minimum breakdown voltage (load dump) of 60 v and a sustaining voltage of 40 v. the inputs are compatible with ttl and 5 v cmos logic systems and include internal pull-down resistors to ensure that the outputs remain off if the inputs are open-circuited. over-current protection for each channel has been designed into these devices and is activated at approximately 1.3 a. it protects each output from short circuits with supply voltages up to 25 v. when a maximum driver output current is reached, that output drive is reduced linearly, maintaining a constant load current. if the over-current or short circuit condition continues, each channel has an independent thermal limit circuit which will sense the rise in junction temperature and turn off the individual channel that is at fault. foldback circuitry decreases the output current if excessive voltage is present across the output and assists in keeping the device within its soa (safe operating area). each output also includes diagnostics for increased device protec- tion. if any output is shorted or opened, the diagnostics can signal the controlling circuitry through a common fault pin. these devices can be used to drive various resistive loads includ- ing incandescent lamps (without warming or limiting resistors). with the addition of external output clamp diodes, they can be used to drive inductive loads such as relays, solenoids, or dc stepping motors. the suffix ??devices are 16-pin power dips while the suffix ?b devices are 28-lead power plccs for surface-mount applications. both packages are of batwing construction to provide for maximum package power dissipation. udx2547b (dip) 2547 protected quad power driver absolute maximum ratings at t a = 25 c output voltage, v out ............................ 60 v over-current protected output voltage, v out ............................................... 25 v output current, i out .......................... 1.3 a* fault output voltage, v f ................... 40 v supply voltage, v cc ............................ 7.0 v input voltage, v in or v en ...................... 7.0 v package power dissipation, p d ........................................ see graph operating temperature range, t a prefix ?dk ............... -40 c to +125 c prefix ?dn ................. -20 c to +85 c prefix ?dq ................. -40 c to +85 c storage temperature range, t s ............................... -55 c to +150 c *outputs are current limited at approximately 1.3 a per driver and junction temperature limited if current in excess of 1.3 a is attempted. see circuit description and application for further information. always order by complete part number: a prefix to indicate operat- ing temperature range + the basic four-digit part number + a suffix to indicate package style, e.g., udk2547eb . features output soa protection low output-saturation voltage diagnostic fault output ttl and 5 v cmos compatible inputs independent over-current protection for each driver independent thermal protection for each driver 600 ma output current per channel data sheet 29317.4c* 1 2 3 14 4 5 6 7 89 10 11 12 13 15 16 enable ground ground out 3 no connect. ground ground out 2 out 1 fault out 4 v cc in 4 dwg. pp-018a in 1 in 2 in 3 supply
2547 protected quad power driver 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 udx2547eb (plcc) functional block diagram <<1 ? out dwg. fp-007 n fault common control one of four drivers a ble in n current limit thermal shutdown 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 ground ground ground ground dwg. pp-019 no connection nc enable supply nc cc v out 1 out 2 out 3 out 4 in 4 in 3 in 2 in 1 no connection no connection fault nc fault copyright ? 1989, 2002 allegro microsystems, inc. 50 75 100 125 150 10 6 4 2 0 allowable package power dissipation in watts temperature in c 8 25 r = 6 c/w jt dwg. gp-004-1a suffix 'eb', r = 36 c/w ja suffix 'b', r = 43 c/w ja
2547 protected quad power driver status in n enable out n fault normal load h h l h lh hh xl hh over-current or short to supply h h r l thermal fault h h h l open load or short to ground l h l l electrical characteristics at t a = +25 c (prefix udn) or over operating temperature range (prefix udk or udq), v cc = 4.75 v to 5.5 v limits characteristic symbol test conditions min. typ. max. units output leakage current* i out v out = 60 v, v in = 0.8 v, v en = 2.0 v 30 150 a v out = 60 v, v in = 2.0 v, v en = 0.8 v 30 150 a output sustaining voltage v out(sus) i out = 100 ma, v in = 0.8 v, v cc = open 40 v output saturation voltage v out(sat) i out = 400 ma 300 mv i out = 500 ma 400 mv i out = 600 ma 550 mv over-current limit i out 5 ms pulsetest, v out = 5.0 v 1. 3 1.7 a input voltage logic 1 v in(1) or v en(1) 2.0 v logic 0 v ln(0) or v en(0) 0.8 v input current logic 1 v in(1) or v en(1) = 2.0 v 60 a logic 0 v in(0) or v en(0) = 0.8 v 10 a fault output leakage current i f v f = 40 v <1.0 2.0 a fault output current i f v f = 40 v, driver outputs open, v in = 0.8 v, v en = 2.0 v 40 60 80 a fault output saturation voltage v f(sat) i f = 30 a 0.1 0.4 v total supply current i cc all outputs on 45 50 ma all outputs off 6.0 10 ma thermal shutdown t j 165 c thermal hysteresis ? t j 15 c typical data is for design information only. *measurement includes xor input current and other elements. x = don t care. r = linear drive, current limited. truth table
2547 protected quad power driver 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 circuit description and application these devices monitor their outputs for open or shorted conditions. both conditions are sensed by comparing the input and output states. note that the fault output is operational only if the enable input is high. when a fault condition is sensed, the fault output will go to a low state. an external fault output filter capacitor (0.1 f) is recom- mended to eliminate erroneous switching. incandescent lamp driver high incandescent lamp turn-on/in-rush currents can contribute to poor lamp reliability and destroy semiconductor lamp drivers. warming (parallel) or current-limiting (series) resistors protect both driver and lamp but use significant power either when the lamp is off or when the lamp is on, respectively. lamps with steady-state current ratings up to 600 ma can be driven without the need for warming or current-limiting resistors, if lamp turn-on time is not a concern. when an incandescent lamp is initially turned on, the cold filament is at minimum resistance and would normally allow a 10x to 12x in-rush current. with these drivers, during turn-on, the high in-rush current is sensed by the internal low-value sense resistor, drive current to the output stage is diverted by the shunting transistor, the output stage operates in a linear mode, and the load current is limited to approxi- mately 1.3 a. during lamp warmup, the filament resistance increases to its maximum value, the output driver goes into saturation and applies maximum rated voltage to the lamp. inductive load driver with the addition of external clamp diodes, bifilar (unipolar) stepper motors and other inductive loads can be driven directly. the external diodes prevent damage to the output transistors by suppressing the high-voltage spikes that occur when turning off an inductive load. for rapid current decay (fast turn-off speeds), the use of zener diodes will raise the flyback voltage and improve performance. however, the peak voltage must not exceed the speci- fied minimum sustaining voltage (v supply + v z + v f v out(sus) ). over-current conditions in the event of a shorted load, or stalled motor, the load current will attempt to increase. as described above, the drive current to the affected output stage is linearly reduced (limiting the load current to about 1.3 a), causing the output stage to go linear. as the junction temperature of the output stage increases, the thermal shutdown circuit will shut off the affected output. if the fault condition is corrected, the output driver will return to its normal saturated condition. normal lamp in-rush current time dwg. wp-005a not to scale lamp current current limit thermal shutdown thermal hysteresis short circuit
2547 protected quad power driver udn2547b and UDQ2547b dimensions in inches (controlling dimensions) dimensions in millimeters (for reference only) 0.508 0.204 7.62 bsc dwg. ma-001-17a mm 10.92 max 16 1 8 7.11 6.10 5.33 max 1.77 1.15 0.39 min 0.558 0.356 2.54 bsc 0.13 min 3.81 2.93 9 19.68 18.67 note 4 notes: 1. exact body and lead configuration at vendor s option within limits shown. 2. lead spacing tolerance is non-cumulative 3. lead thickness is measured at seating plane or below. 4. webbed lead frame. leads 4, 5, 12, and 13 are internally one piece. 0.020 0.008 0.300 bsc dwg. ma-001-17a in 0.430 max 16 1 8 0.280 0.240 0.210 max 0.070 0.045 0.015 min 0.022 0.014 0.100 bsc 0.005 min 0.150 0.115 9 0.775 0.735 note 4
2547 protected quad power driver 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 udn2547eb and UDQ2547eb dimensions in inches (controlling dimensions) dimensions in millimeters (for reference only) 0.51 min 4.57 4.20 1.27 bsc 12.57 12.32 11.582 11.430 1 28 index area dwg. ma-005-28a mm 0.812 0.661 0.331 0.533 12.57 12.32 26 25 19 18 12 11 4 5 11.58 11.43 5.56 4.85 5.56 4.85 notes: 1. exact body and lead configuration at vendor s option within limits shown. 2. lead spacing tolerance is non-cumulative 3. webbed lead frame. leads 5 through 11 and 19 through 25 are internally one piece. 18 12 0.020 min 0.050 bsc 1 28 index area dwg. ma-005-28a in 0.026 0.032 0.013 0.021 26 25 19 11 4 5 0.165 0.180 0.495 0.485 0.456 0.450 0.495 0.485 0.456 0.450 0.219 0.191 0.219 0.191
2547 protected quad power driver the products described here are manufactured under one or more u.s. patents or u.s. patents pending. allegro microsystems, inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. before placing an order, the user is cautioned to verify that the information being relied upon is current. allegro products are not authorized for use as critical components in life-support devices or systems without express written approval. the information included herein is believed to be accurate and reliable. however, allegro microsystems, inc. assumes no responsibility for its use; nor for any infringe- ment of patents or other rights of third parties which may result from its use.
2547 protected quad power driver 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 power sink drivers in order of 1) output current, 2) output voltage, 3) number of drivers output ratings * features serial latched diode internal ma v # input drivers clamp outputs protection part number ? 75 17 8 x x C constant current C6275 17 16 x x C constant current C6276 100 20 8 CC Csaturated C 2595 30 32 x x CC C5833 40 32 x x Csaturated C 5832 50 8 addressable decoder/driver dmos C6b259 50 8 Cx Cdmos C 6b273 50 8 x x Cdmos C 6b595 120 24 8 x x C constant current C6277 250 50 8 addressable decoder/driver dmos C6259 50 8 Cx Cdmos C 6273 50 8 x x Cdmos C 6595 50 8 CCx saturated C2596 60 4 CC x saturated x 2557 350 50 4 Cx x C C 5800 50 7 CCx C C2003 50 7 CCx C C2004 50 8 CCx C C2803 50 8 Cx x C C 5801 50 8 x x CC C5821 50 8 x x x CC5841 50 8 addressable decoder/driver dmos C6a259 50 8 x x Cdmos C 6a595 80 8 x x CC C5822 80 8 x x x CC5842 95 7 CCx C C2023 95 7 CCx C C2024 450 30 28 dual 4- to 14-line decoder/driver CC6817 600 60 4 CC Csaturated x 2547 60 4 CC x saturated x 2549 and 2559 700 60 4 CC x saturated x 2543 750 50 8 CCx saturated C2597 1000 46 4 stepper motor controller/driver mos C7024 and 7029 1200 46 4 microstepping controller/driver mos C7042 1250 50 4 stepper motor translator/driver Cx 5804 1800 50 4 CCx C C2540 3000 46 4 stepper motor controller/driver mos C7026 46 4 microstepping controller/driver mos C7044 4000 50 4 CCx C C2878 * current is maximum specified test condition, voltage is maximum rating. see specification for sustaining voltage limits or over-current protection voltage limits. ? complete part number includes additional characters to indicate operating temperature range and package style.
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