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IC-GE pwm relay/solenoid driver rev a0.6, page 1/ 11 features ? current control for inductive actuators at 24 v (10 to 36 v) ? high ef?cient current control up to 1 a ? power saving and power dissipation reduced switching ? individual setting of energising and hold current ? monitoring of coil current, supply voltage and temperature ? status indication via led or logic output ? contact conserving switching of relays synchronous to the mains ? shutdown with overtemperature and undervoltage ? fast demagnetising due to 15 v countervoltage ? high pwm frequency mit frequency spreading for low emi ? energising time of 50 ms prolongable with external capacitor applications ? pwm drive for inductive loads (e.g. 6/12 v relays, electrovalves) from 24 v ? relay low-/high-side switch packages qfn16 4 x 4 block diagram copyright ? 2011 ic-haus http://www.ichaus.com p r e l i m i n a r y p r e l i m i n a r y s w v b i c - g e r h o l d t a c t e n l s w s y n c i a c t c a c t l e d r m i h o l d 0 . 0 1 . . 1 0 h v b r a c t g n d g n d r a c t c v b d i a g r h o l d c a c t c v b
IC-GE pwm relay/solenoid driver rev a0.6, page 2/ 11 description IC-GE is a pwm driver for inductive loads, such as relay coils, solenoid valves and other inductive loads. the setpoints for the coils energising and hold cur- rent are preset by means of external resistors ract and rhold. these currents can be set in a range from 100 ma to 1 a. the IC-GE intrinsically switches from energising to hold mode after 50 ms provided that the set energising current has been reached. a capacitor at tact prolongs the time before the switch to hold mode occurs. the changeover between energising 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 cutting the current by halv reduces the power dissipation by ca. 75%. using pwm the output current is controlled to the values set at ract and rhold. the internal ?y- back diode maintains the current during the switch- ing pauses. the switching frequency of ca. 80 khz is provided by the internal oscillator. varying this fre- quency between 70 khz and 90 khz reduces the emi. the device is shutdown by a low signal at input en 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. alternatively to using an led output diag signals the correct operating by out- putting a high signal. the input signal at en can be synchronised with the zero crossing at input sync. thus by using an ex- ternal r/c network, the switching of the coil can be synchronised with the load current of e.g. the relay. packages so8, pdip8 to jedec pin configuration qfn16 4 mm x 4 mm pin functions no. name function 1 en enable input 2 gnd ground 3 gnd ground 4 gnd ground 5 sw pwm output 6 sw pwm output 7 sw pwm output 8 vb +10...36 v supply voltage 9 vb +10...36 v supply voltage 10 vb +10...36 v supply voltage 11 diag status output 12 sync sync input 13 rm reference ground for ract and rhold 14 tact energising time prolongation 15 ihold hold current setup 16 iact energising current setup p r e l i m i n a r y p r e l i m i n a r y 1 2 16 15 14 13 12 11 10 9 8 7 6 5 4 3 tp
IC-GE pwm relay/solenoid driver rev a0.6, page 3/ 11 absolute maximum ratings beyond these values damage may occur; device operation is not guaranteed. item symbol parameter conditions unit no. min. max. g001 v(vb) voltage at vb -0.3 37 v g002 i(vb) current in vb -1100 6 ma g003 v(sw) voltage at out -0.3 53 v g004 i(sw) output current in out -6 1100 ma g005 v(diag) voltage at led -0.3 37 v g006 i(diag) current in led -6 8 ma g007 v(iact) voltage at iset -0.3 7 v g008 i(iact) current in iset -6 6 ma g009 v(ihold) voltage at ihold -0.3 7 v g010 i(ihold) current in ihold -6 6 ma g011 v(en) voltage at in -0.3 37 v g012 i(en) current in in -6 6 ma g013 v(sync) voltage at sync -7 37 v g014 i(sync) current in sync -6 6 ma g015 v(tact) voltage at tact -0.3 7 v g016 i(tact) current in tact -6 6 ma g017 v(rm) voltage at rm -0.3 1 v g018 i(rm) current in rm -6 6 ma g019 vd() susceptibility to esd at all pins hbm 100 pf discharged through 1.5 k
2 kv g020 tj junction temperature -40 150 c g021 ts storage temperature -40 150 c thermal data operating conditions: vb = 10...36 v, lsw = 0.01...10 h, ract = 5...50 k
, rhold = 5...50 k
item symbol parameter conditions unit no. min. typ. max. t01 ta operating ambient temperature range -40 85 c t02 rthja thermal resistance chip/ambient mounted to a pcb, therm. pad at ca. 2 cm2 30 40 k/w copper area all voltages are referenced to ground unless otherwise stated. all currents ?owing into the device pins are positive; all currents ?owing out of the device pins are negative. p r e l i m i n a r y p r e l i m i n a r y
IC-GE pwm relay/solenoid driver rev a0.6, page 4/ 11 electrical characteristics operating conditions: vb = 10...36 v, lsw = 0.01...10 h, ract = 5...50 k
, rhold = 5...50 k
, tj = -40...125 c. item symbol parameter conditions unit no. min. typ. max. total device 001 vb permissible supply voltage range 10 36 v 002 i(vb) supply current in vb en < 0.8 v 20 a 003 i(vb) supply current in vb en = hi 0.5 4 ma 004 vc()lo clamp voltage lo at all pins ex- cept sync i() = -4 ma, other pins open -1.4 -0.3 v 005 vc()lo clamp voltage lo an sync i() = -4 ma, andere pins offen -7 v 006 vc()hi clamp voltage hi at vb, en, diag, sync i() = 4 ma, other pins open 37 v 007 vc()hi clamp-voltage hi at iact, ihold, tact i() = 4 ma, other pins open 7 v 008 vc()hi 5 v 009 vc()hi clamp-spannung hi an sw i(out) = 4 ma, other pins open 10 17 v driver output sw 101 vs()lo saturation voltage lo i(sw) = 1000 ma (see figure 1 ) 600 mv 102 vs()lo saturation voltage lo i(sw) = 100 ma (see figure 1 ) 100 mv 103 i(sw) pwm-current range 100 1000 ma 104 isc() short-circuit current v(sw) = vb 1.1 4 a 105 vc()hi clamp voltage hi at pwm-free- wheeling vc()hi = v(sw) vb; en = hi, i(sw) = 1000 ma (see figure 1 ) 600 mv 106 vc()hi clamp voltage hi at pwm-free- wheeling vc()hi = v(sw) vb; en = hi, i(sw) = 100 ma (see figure 1 ) 100 mv 107 vc()off clamp voltage hi at turn-off vc()hi = v(sw) vb; en: hi ! lo, i(sw) = 1000 ma (see figure 1 ) 12 15 17 v 108 iik() leakage current en = lo, v(sw) = 0...vb 1 10 a 109 twon()min minimum pwm turn-on duration en = hi, i(sw) > i(sw)act resp. i(sw)hold (see figure 1 ) 250 1000 ns input en 201 vt()on threshold voltage hi 1.1 1.4 v 202 vt()off threshold voltage lo 0.8 1.1 v 203 vt()hys hysteresis vt()hys = vt()on vt()off 200 400 mv 204 ipd() pull-down current v(en) = 0.8...36 v 20 a 205 tp(vb-sw) turn-on delay after power-up en = vb, vb = vboff ! vbon 40 s 206 tp(en-sw) turn-on delay en: lo ! hi until sw active 30 s 207 tp(en-sw) turn-off delay en: hi ! lo until sw inactive 10 s 208 tp(en- diag) delay time from en to diag = hi or led permanently on no error 20 s status monitor diag 401 ipd() pull-down current v(diag) = 6 v...vb, sw active, no error 3 5 8 ma 402 vblo permissible supply voltage for led operation at diag 6 36 v 403 v()hi hi-level at diag without led 4.5 6.5 v 404 f() frequency on error 1.8 2.4 3.6 hz 405 vs()lo saturation voltage lo i(diag) = 200 a, without led 0.4 v 406 ipu() pull-up current v(diag) = 0 ...4 v -120 -100 -80 a 407 vbon turn-on threshold at vb v(diag): lo ! hi 8 8.5 9 v 408 vboff undervoltage threshold at vb decreasing voltage vb, v(diag): hi ! lo 7.5 8 8.5 v 409 vbhys hysteresis vbhys = vbon vboff 200 500 800 mv 410 toff thermal shutdown temperature 140 170 c 411 ton thermal release temperature decreasing temperature 120 150 c 412 thys thermal shutdown hysteresis thys = toff ton 10 20 30 c p r e l i m i n a r y p r e l i m i n a r y
IC-GE pwm relay/solenoid driver rev a0.6, page 5/ 11 electrical characteristics operating conditions: vb = 10...36 v, lsw = 0.01...10 h, ract = 5...50 k
, rhold = 5...50 k
, tj = -40...125 c. item symbol parameter conditions unit no. min. typ. max. referenz iact and ihold 701 v() reference voltage at iact and ihold 1.21 1.27 1.33 v 702 isc() short-circuit current in iact and ihold v(iset) = 0 v or v(ihold) = 0 v -4.5 -3.5 -2.5 ma 703 k1 transfer value for energising current ract = k1 / i(sw)act i(sw)act = 100...1000 ma 4500 5000 5500
a 704 k2 transfer value for hold current rhold = k2 / i(sw)hold i(sw)hold = 100...1000 ma 4500 5000 5500
a energising time prolongation tact c01 tppwmlo propagation delay from en = hi to changeover from iact to ihold tact not connected (ssee figure 1 ) 40 50 60 ms c02 k3 energising time prolongation tppwm = tppwmlo + k3 cact 0.8 1 1.2 ms/nf c03 vth()tact threshold at tact 1.27 v c04 ipu() pull-up current at tact v(tact) = 0.1...1.1 v 1.2 a c05 ipd() pull-down current at tact v(tact) = 0.1...1.1 v, after crossing threshold at tact 0.3 3.5 ma c06 vs() saturation voltage at tact i(tact) = 10 a 20 mv oscillator j01 fosc mean oscillator frequency (fmax + fmin) / 2 60 80 120 khz j02 df frequency variation (fmax - fmin) / (2 fosc) 12 15 % synchronisation sync s01 vth()sync trigger threshold at sync -20 20 mv s02 ilk() leakage current v(sync) = -3 v ... 3 v -100 100 na p r e l i m i n a r y p r e l i m i n a r y
IC-GE pwm relay/solenoid driver rev a0.6, page 6/ 11 electrical characteristics: diagrams figure 1: operation modes energise , hold , turn-off t mag i ( sw ) act lsw vb (1) t dmag i ( sw ) hold lsw v c ( sw vb ) off (2) p r e l i m i n a r y p r e l i m i n a r y
IC-GE pwm relay/solenoid driver rev a0.6, page 7/ 11 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. 703 resp. 704: ract = k 1 i ( sw ) act (3) rhold = k 2 i ( sw ) hold (4) example for a relay with a starting current of 200 ma and 100 ma hold current the following applies: ract = 5 k
a 0.2 a = 25 k
(5) rhold = 5 k
a 0.1 a = 50 k
(6) application circuits figure 2: activation by switching vb ract = 5 k
for 1 a energising current and rhold = 10 k
for 500 ma hold current figure 3: activation by switching gnd figure 4: activation via en feedback from diag with 5 v logic levels figure 5: 470 nf for 470 ms energising time prolon- gation p r e l i m i n a r y p r e l i m i n a r y 1 0 0 n f s y n c 1 0 k c v b g n d 5 k r m 5 k i c - g e i a c t 1 0 . . 3 6 v l e d d i a g v b i c - g e e n r a c t c v b r a c t 1 0 k r h o l d r h o l d i h o l d t a c t 1 0 0 n f s w g n d s y n c 1 0 0 n f d i a g g n d e n t a c t 1 0 . . 3 6 v c v b i a c t r h o l d v b l e d s w i h o l d i c - g e 1 0 k 1 0 0 n f r m 5 k r a c t c v b r h o l d g n d 1 0 k 5 k r a c t g n d c v b 1 0 0 n f t a c t 1 0 k c v b e n i c - g e d i a g s w s y n c g n d r m i h o l d r h o l d i a c t 1 0 . . 3 6 v 5 k r a c t e n d i a g v b 1 0 0 n f 1 0 k r h o l d r a c t 5 k 1 0 0 n f 1 0 . . 3 6 v i h o l d c a c t v b r a c t e n e n s w g n d 1 0 0 n f g n d r m s y n c 1 0 k 4 7 0 n f i c - g e 5 k c v b l e d r h o l d t a c t d i a g i a c t r a c t c a c t c v b 1 0 k r h o l d 4 7 0 n f 5 k
IC-GE pwm relay/solenoid driver rev a0.6, page 8/ 11 figure 6: high-side driver for relays with free- wheeling diode figure 7: low-side driver for relays with free-wheeling diode figure 8: utilising the sync input by means of resistors rs* and capacitors cs* a phase shifted signal at sync is derived from the 50 hz load supply. thus the relay is activated resp. deactivated with zero crossing of the load supply after sworking en. the phase shift is used to compensate the switching delay of the relay so that the load can be switched at zero current. the bene?t from synchronous switching may be utilised, if the switching times are short and repro- ducible. figure 9: utilising the sync input p r e l i m i n a r y p r e l i m i n a r y v b r h o l d c v b d i a g 1 0 k t a c t 5 k i a c t s w e n 1 0 0 n f r a c t s y n c r a c t l e d 1 0 . . 3 6 v 5 k r m g n d g n d 1 0 k i h o l d i c - g e c v b 1 0 0 n f r h o l d i a c t 1 0 0 n f 5 k 1 0 k r h o l d r a c t r h o l d 5 k c v b r m i c - g e v b d i a g 1 0 k g n d i h o l d l e d s y n c e n t a c t g n d r a c t s w 1 0 0 n f c v b 1 0 . . 3 6 v s y n c 1 n f 5 k c v b 5 k r l 1 0 p 1 0 0 k c s p 1 0 k 1 0 k c s n r s g 1 0 p r s 1 0 p r h o l d c s p c s g d i a g r a c t 1 0 0 n f r h o l d c s n i a c t 1 0 p 1 0 0 n f 1 0 . . 3 6 v g n d 2 m e g r m r a c t 1 0 0 k e n c s g r s 5 0 h z i h o l d r l r s g e n v b g n d 2 m e g s w l e d c v b i c - g e a c p t a c t a c n 1 n f i a c t t i m e i h o l d v ( s y n c ) i ( r l ) t i m e i ( s w ) t i m e t i m e v ( a c ) t i m e t r e l o n v ( e n )
IC-GE pwm relay/solenoid driver rev a0.6, page 9/ 11 application example with four relays of equal acceleration rel# relay type rel1 rel2 rel3 rel4 n no. of turns 6000 3000 1500 3000 d wire diameter 0.2 0.28 0.4 0.4 mm vbln nominal coil supply voltage 24 12 6 6 v vblmin minimum required supply voltage 75% of vbln 18 9 4.5 4.5 v vblmax maximum allowed supply voltage vbln + 25% 30 15 7.5 7.5 v iswn nominal coil current 208 416 832 416 ma ri coil resistance at room temperature 115.4 28.8 7.2 14.4
rimax elevated coil resistance at 80 c 155 38.8 9.7 19.4
pvln power dissipation in the coil vbln 2 / ri 5 5 5 2.5 w table 4: manufacturer data imin energising current vblmin / rimax, for sure switching of the realy at high temperature and low power supply 116 232 464 232 ma ract calculation: ract = k1min / imin = 4500 / imin, the selected resistor must be smaller then the calculated value 38.8 19.4 9.7 19.4 k
iswmax maximum current is iswmax = k1max / ract = 5500 / ract 142 284 567 284 ma vblact maximum voltage at coil rimax iswmax 22.0 11.0 5.5 5.5 v vs saturation voltage characteristics no. 101 and no. 102 interpo- lated, vs()lo iswmax / 1000 ma 0.1 0.2 0.4 0.2 v vbmin minimum supply voltage at IC-GE vblact + vs 22.1 11.2 10 10 v vbmax maximum supply voltage at IC-GE 36 36 36 36 v pv power dissipation at pwm vs / vblact 0.5 1.8 7.3 3.6 % ivb average current in vb for pwm at 24 v vb iswmax vblact / 24 v (1 + pv) 131 133 139 68 ma pvl power dissipation in the coil rimax iswmax 2 3.12 3.12 3.12 1.56 w pvlhold power dissipation at reduced hold current ihold of e.g. 2/3 iact 1.39 1.39 1.39 0.7 w table 5: IC-GE application rel1 would be a standard 24 v relay. it could only be used with IC-GE, if operation at 22.1 v can be guaran- teed. rel2 and rel3 are 6/12 v standard relays and thus optimal usable with IC-GE at a 24 v supply voltage. rel4 is optimised for low power dissipation, since the coils has twice the number of turns than rel3 and a p 2 wider diameter than rel2. thus the power dissi- pation in the coil is halved. by means of the optimised power control e.g. with a permanently-on 24 v mains-insulation relay of photo- voltaic or heating systems up to (5 w 0.7 w ) 24 h 365 days = 37.7 kwh may be saved per year. figure 10: energy savings p r e l i m i n a r y p r e l i m i n a r y
IC-GE pwm relay/solenoid driver rev a0.6, page 10/ 11 ic-haus expressly reserves the right to change its products and/or speci?cations. an info letter gives details as to any amendments and additions made to the relevant current speci?cations on our internet website www.ichaus.de/infoletter ; this letter is generated automatically and shall be sent to registered users by email. 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 and does not assume liability for any errors or omissions in these 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. as a general rule our developments, ips, principle circuitry and range of integrated circuits are suitable and speci?cally designed for appropriate use in technical applications, such as in devices, systems and any kind of technical equipment, in so far as they do not infringe existing patent rights. in principle the range of use is limitless in a technical sense and refers to the products listed in the inventory of goods compiled for the 2008 and following export trade statistics issued annually by the bureau of statistics in wiesbaden, for example, or to any product in the product catalogue published for the 2007 and following exhibitions in hanover (hannover-messe). we understand suitable application of our published designs to be state-of-the-art technology which can no longer be classed as inventive under the stipulations of patent law. our explicit application notes are to be treated only as mere examples of the many possible and extremely advantageous uses our products can be put to. p r e l i m i n a r y p r e l i m i n a r y
IC-GE pwm relay/solenoid driver rev a0.6, page 11/ 11 ordering information type package order designation IC-GE qfn16 4 mm x 4 mm IC-GE qfn16 4x4 for technical support, information about prices and terms of delivery 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 appointed local distributors: http://www.ichaus.com/sales_partners p r e l i m i n a r y p r e l i m i n a r y

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