ic-je pwm relay/solenoid driver rev f1, page 1/ 9 features ? wide operating voltage range of 10 to 45 vdc ? pwm control for coil currents of 40 to 300 ma ? coil current for energise and hold modes set by an external resistor ? coil current monitored during energise mode, detection of load breakage and voltage errors ? automatic current reduction after 100 ms to reduce the power consumption in hold mode ? the internal free-wheeling alteration function supports pwm operation and quick demagnetising during shutdown ? status signalled at the current-limited led output ? shutdown with excessive temperature and low voltage ? integrated oscillator needs no external components ? pwm frequency is beyond audible range ? protective circuitry against damage by esd ? minimum space requirements, few external components applications ? pwm drive for inductive loads (e.g. relays, electrovalves) ? relay low-/high-side switch packages so8 pdip8 block diagram copyright ? 2007 ic-haus http://www.ichaus.com i - mux mux t = 25 us 15 v hold ini err v 1.2 v x0.66 x1.0 ini - + 1 0 + 80 khz hold pwmok pwmok en r q s out 7 vb 86 gnd 3 in iset2 1 led gnd 10...45 v start t >= 100 ms on2.4 hz off rset10...60 k w 0.01...10 h lout ic?je control pwm delay hold modereset turn?on thermal shutdown low voltage input reference driver output turn?on current control
ic-je pwm relay/solenoid driver rev f1, page 2/ 9 description ic-je is a pwm driver for inductive loads, such as relay coils, solenoid valves and small dc motors. the setpoint for the coil current is preset with the help of the rset external resistor. 60 to 300 ma can be set for energise mode which then automatically drop to 2/3 of this value (40 to 200 ma) during hold mode. the device is switched to hold mode after 100 ms provided that the set coil current is obtained during energising (pwmok = 1). the changeover between energise and hold modes is suitable for typical relay drives which require a powerful initial energising current which can then be reduced after closing the air gap in a magnetic cir- cuit. the quadratic dependence on the current inten- sity means that the power dissipation of the system is more than halved through this reduction. the output current is measured with zero loss at the power transistors on resistance and compared to the setpoint. in order to maintain this setpoint, the switch-on time of the coil driver is modulated by the pulse width. the internal ?yback diode maintains the current during the switching pauses. the switching frequency of ca. 80 khz is provided by the internal oscillator. the device is shutdown by a low signal at input in or the removal of the power supply; the current re- duction in the coil is supported by the changeover of the free-wheeling circuit. the zener diode now ac- tive permits higher free-wheeling voltages and thus a quicker demagnetising of the coil. the status indicator led is constantly on when hold mode is functioning correctly and ?ashes with low voltage, excessive temperature or when the coil cur- rent in energise mode has not reached the setpoint. the driver output is shutdown with low voltage or ex- cessive temperature. the device is protected against destruction by esd. packages so8, pdip8 to jedec pin configuration so8 (top view) pin configuration pdip8 (top view) pin functions no. name function 1 led state monitor 2 iset pwm reference current (setpoint ad- justment) 3 in input 4 n.c. 5 n.c. 6 gnd ground 7 out pwm output 8 vb +10 to 45 v supply voltage led iset in n.c. n.c. gnd out vb 1 ic?je code ... ...yyww ... ic?je code ... ...yyww 1 23 4 87 6 5 ... led iset in n.c. n.c. gnd out vb
ic-je pwm relay/solenoid driver rev f1, page 3/ 9 absolute maximum ratings beyond these values damage may occur; device operation is not guaranteed. item symbol parameter conditions fig. unit no. min. max. g001 v(vb) voltage at vb -0.3 48 v g002 i(vb) current in vb -350 6 ma g003 v(out) voltage at out -0.3 60 v g004 i(out) output current in out -6 350 ma g005 v(led) voltage at led -0.3 vb v g006 i(led) current in led -6 8 ma g007 v(iset) voltage at iset -0.3 48 v g008 i(iset) current in iset -6 6 ma g009 v(in) voltage at in -0.3 48 v g010 i(in) current in in -6 6 ma g011 tj junction temperature -40 150 c g012 ts storage temperature -40 150 c thermal data operating conditions: vb = 10...45 v, lout = 0.01...10 h, rset = 10...60 k item symbol parameter conditions fig. unit no. min. typ. max. t01 ta operating ambient temperature range -25 80 c t02 rthja thermal resistance chip/ambient pdip8 package 110 k/w t03 rthja thermal resistance chip/ambient so8 package 140 k/w all voltages are referenced to ground unless otherwise stated. all currents into the device pins are positive; all currents out of the device pins are negative.
ic-je pwm relay/solenoid driver rev f1, page 4/ 9 electrical characteristics operating conditions: vb = 10...45 v, lout = 0.01...10 h, rset = 10...60 k , tj = -25...125 c, unless otherwise noted. led connected or pin led linked to gnd (via ca. 500 resistor or capacitor). item symbol parameter conditions tj fig. unit no. c min. typ. max. total device 001 vb permissible supply voltage range 10 45 v 002 i(vb) supply current in vb outputs out, led disabled 0.5 2 ma 003 i(vb) supply current in vb output out enabled 0.5 3 ma 004 vc()lo clamp voltage lo at all pins i() = -4 ma, other pins open -1.4 -0.3 v 005 vc()hi clamp voltage hi at vb, in, iset i() = 4 ma, other pins open 48 57 v 006 vc()hi clamp voltage hi at out i(out) = 4 ma, other pins open 60 71 v 007 vc()hi clamp voltage hi at led vs. vb vc()hi = v(led) ? v(vb); i(led) = 4 ma, other pins open 0.3 1.4 v driver output out 101 vs()lo saturation voltage lo i(out) = 200 ma 1 360 600 mv 102 vs()lo saturation voltage lo i(out) = 300 ma 1 550 850 mv 103 pwmthi permissible energising current 1 300 ma increased energising current by rc-circuit at iset, hold current 200 ma max. 5 , 6 350 ma 104 pwmthi permissible hold current 1 40 ma 105 isc() short-circuit current v(out) = vb 0.6 1 1.7 a 106 vc()hi clamp voltage hi at pwm-free-wheeling vc()hi = v(out) ? vb; in = hi, i(out) = 200 ma 1 1 1.5 v 107 vc()hi clamp voltage hi at pwm-free-wheeling vc()hi = v(out) ? vb; in = hi, i(out) = 300 ma 1 1.4 2 v 108 vc()off clamp voltage hi at turn-off vc()hi = v(out) ? vb; in: hi lo, i(out) = 200 ma 1 12 15 17 v 109 iik() leakage current in = lo, v(out) = 0...vb 1 10 a 110 twon()min minimum pwm turn-on duration in = hi, iset open 1 250 1000 ns 111 c() permissible load capacitance 1 nf input in 201 vt()on threshold voltage hi 2.6 2.85 3.2 v 202 vt()off threshold voltage lo 1.7 2.0 2.3 v 203 vt()hys hysteresis vt()hys = vt()on ? vt()off 0.7 0.85 1.1 v 204 lpd() pull-down current v(in) = 4...45 v 50 100 200 a 205 rpd() pull-down resistor v(in) = 0...4 v 20 50 80 k 206 tp(in-out) turn-on delay in: lo hi 20 s 207 tp(in-out) turn-off delay in: hi lo 10 s 208 tp(vb- out) turn-on delay when vb is powered up in = vb, vb = vboff vbon 40 s 209 tp(in-led) delay time from in to led (with light permanently on) pwmok = 1 before tppmwlo 65 100 135 ms 210 tp(in-led) delay time from in to led (with light ?ashing) pwmok = 0 130 200 270 ms status monitor led 301 ipd() pull-down current v(led) = 5 v...vb 3 5 8 ma 302 vs()lo saturation voltage lo i(led) = 200 a 0.4 v 303 ipu() pull-up current v(led) = 0 v...(vb ? 1 v) -20 -100 -300 a 304 vblo permissible supply voltage for monitoring function 6 45 v 305 vbon turn-on threshold at vb 7.6 8 8.4 v 306 vboff undervoltage threshold at vb decreasing voltage vb 7.1 7.5 7.9 v 307 vbhys hysteresis vbhys = vbon ? vboff 200 500 800 mv 308 toff thermal shutdown temperature 130 140 150 c
ic-je pwm relay/solenoid driver rev f1, page 5/ 9 electrical characteristics operating conditions: vb = 10...45 v, lout = 0.01...10 h, rset = 10...60 k , tj = -25...125 c, unless otherwise noted. led connected or pin led linked to gnd (via ca. 500 resistor or capacitor). item symbol parameter conditions tj fig. unit no. c min. typ. max. 309 ton thermal lock-on threshold decreasing temperature 110 120 130 c 310 thys thermal shutdown hysteresis thys = toff ? ton 10 20 30 c 311 f() flash frequency on error err = hi or pwmok = 0, vb = 6...45 v 1.8 2.4 3.6 hz reference iset 401 v() reference voltage 1.14 1.20 1.26 v 402 isc() short-circuit current v(iset) = 0 v -2.5 -1.8 -0.3 ma 403 k1 transfer value for energising current rset = k1 / i(out)start i(out)start = 60...300 ma 1 2900 3400 3900 a 404 crrel relative current ratio it(out)hold / it(out)start (trigger thresholds ratio: hold vs. energise mode) i(out)start = 60...300 ma 1 63 66 71 % 405 k2 transfer value for hold current rset = k2 / i(out)hold i(out)hold = 40...200 ma 1930 2315 2700 a oscillator 501 fosc oscillator frequency 1 60 80 120 khz turn-on current control 601 tppwmlo hold mode propagation delay pwmok = 1 before tppwmlo 65 100 135 ms electrical characteristics: diagrams figure 1: operation modes: energise mode, hold mode and turn-off t mag it ( out ) start lout vb (1) t dmag it ( out ) hold lout v c ( out ? vb ) hi (2) v(out) v(in) vt(in)hi vt(in)lo tppwmlo tdmag time time time vb vs(out)lo[200ma] it(out)start i(lout) it(out)hold gnd tmag vc(out?vb)off vc(out?vb)hi [300ma] vc(out?vb)hi [200ma] vs(out)lo[300ma] energise mode hold mode turn?off 1/fosc twon(out)min
ic-je pwm relay/solenoid driver rev f1, page 6/ 9 applications information setting the coil current the following equations can be given for the energise and hold modes of the pwm control using electrical characteristics nos. 403 to 408: rset = k 1 i ( out ) start (3) rset = k 2 i ( out ) hold (4) example for a relay with a starting current of 100 ma (66 ma hold current) rset is calculated as: rset = 3250 a 0.1 a = 32.5 k (5) application circuits figure 2: driver/relay combination activated via the external control input in figure 3: driver/relay combination activated via the supply pin gnd figure 4: driver/relay combination activated via the supply pin vb figure 5: increased energizing current due to the par- allel rc-circuit gnd 10...45 v rset 10...60 k w lout 0.01...10 h 100 nf led iset in gnd vb out ic?je control gnd 10...45 v rset 10...60 k w lout 0.01...10 h 100 nf led iset in gnd vb out ic?je control in 10...45 v r2 lout 0.01...10 h 100 nf led iset in gnd vb out ic?je control r1 c1 gnd 10...45 v rset 10...60 k w lout 0.01...10 h 0...100 nf led iset in gnd vb out ic?je control
ic-je pwm relay/solenoid driver rev f1, page 7/ 9 figure 6: activation via pin in with an increased en- ergizing current. an additional schottky diode discharges c1 if in is switched to low (gnd) figure 7: high-side driver for an external relay with a ?yback diode figure 8: low-side driver for an external relay with a ?yback diode 10...45 v gnd 0.01...10 h lout 100 nf 10...60 k w rset led iset in gnd vb out ic?je control 10...45 v gnd 10...60 k w rset lout 0.01...10 h 100 nf led iset in gnd vb out ic?je control gnd 10...45 v r2 10...60 k w lout 0.01...10 h 100 nf led iset in gnd vb out ic?je control in (lo = gnd) d1 r1 c1
ic-je pwm relay/solenoid driver rev f1, page 8/ 9 evaluation board the ic-je is equipped with a evaluation board for test purposes. the following ?gures show the circuit dia- gram as well as the top and bottom layout of the test pcb. the board comes with a strap between in and sense1 (application equal to fig. 4 ). the actual coil current can be measured by the voltage drop between sense1 and sense2 (1 mv/ma). figure 9: schematic diagram of the evaluation board figure 10: evaluation board (components side) figure 11: oscilloscope graph of the evaluation cir- cuit (sampled) this speci?cation is for a newly developed product. ic-haus therefore reserves the right to change or update, without notice, any information contained herein, design and speci?cation; and to discontinue or limit production or distribution of any product versions. please contact ic-haus to ascertain the current data. copying C even as an excerpt C is only permitted with ic-haus approval in writing and precise reference to source. ic-haus does not warrant the accuracy, completeness or timeliness of the speci?cation on this site and does not assume liability for any errors or omissions in the materials. the data speci?ed is intended solely for the purpose of product description. no representations or warranties, either express or implied, of merchantability, ?tness for a particular purpose or of any other nature are made hereunder with respect to information/speci?cation or the products to which information refers and no guarantee with respect to compliance to the intended use is given. in particular, this also applies to the stated possible applications or areas of applications of the product. ic-haus conveys no patent, copyright, mask work right or other trade mark right to this product. ic-haus assumes no liability for any patent and/or other trade mark rights of a third party resulting from processing or handling of the product and/or any other use of the product. r 0.5 out vb gnd in iset led rset 33.2 k w pwm coil driver ic?je h470 relais 100 nf cvb 1 rsense gnd sense2 sense1 vb led in in iset led out vb gnd led1 vb1 33.2 k w rset1 ic?je pwm coil driver cvb1 100 nf in1 vb1 out1 led1 d102 evaluation circuit application field gnd1 lout energise hold turn?off 100 ma 66 ma 0 ma 20 v 0 v 100 ms 0 ms t aus 35 v i(lout) vout
ic-je pwm relay/solenoid driver rev f1, page 9/ 9 ordering information type package order designation ic-je pdip8 ic-je pdip8 so8 ic-je so8 evaluation board ic-je eval je1d for information about prices, terms of delivery, other packaging options etc. please contact: ic-haus gmbh tel.: +49 (61 35) 92 92-0 am kuemmerling 18 fax: +49 (61 35) 92 92-192 d-55294 bodenheim web: http://www.ichaus.com germany e-mail: sales@ichaus.com
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