1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com hv826 features 1.8 to 3.5v operating supply voltage dc to ac conversion output voltage regulation adjustable output lamp frequency adjustable converter frequency enable/disable function applications pagers portable transceiver cellular phones remote control units calculators ? ? ? ? ? ? ? ? ? ? ? general description the supertex hv826 is a high voltage driver designed for driving el lamps. the input supply voltage range is from 1.8v to 3.5v. the device uses a single inductor and a minimum number of passive components. the nominal regulated output voltage that is applied to the el lamp is 80v. the chip can be enabled/disabled by connecting the resistor on the rsw-osc pin to vdd/gnd. the hv826 has two internal oscillators, a switching mosfet, and a high voltage el lamp driver. the frequency for the switching mosfet is set by an external resistor connected between the rsw-osc pin and the vdd supply pin. the el lamp driver frequency is set by an external resistor connected between rel-osc pin and the vdd pin. an external inductor is connected between the lx pin and vdd pin. a 0.01-0.1f capacitor is connected between the cs pin and gnd. the el lamp is connected between the va pin and the vb pin. the switching mosfet charges the external inductor and discharges it into the capacitor at the cs pin. the voltage at cs will start to increase. once the voltage at cs reaches a nominal value of 80v, the switching mosfet is turned off to conserve power. the output pins va and vb are con?gured as an h bridge and are switching in opposite states to achieve 160v peak-to-peak across the el lamp. hv826 block diagram c _ disable gnd vdd va cs lx vb rsw -osc rel-osc v sen + output osc q q q q switch osc v ref high voltage el lamp driver ic
2 hv826 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com l = lot number yy = year sealed ww = week sealed = green packaging h826 llll yyw w top marking bottom marking absolute maximum ratings parameter value supply voltage, v dd -0.5v to +4.5v output voltage, v cs -0.5v to +100v operating temperature range -25c to +85c storage temperature range -65c to +150c 8-lead soic power dissipation 400mw 8-lead msop power dissipation 300mw sym parameter min typ max units conditions electrical characteristics dc characteristics (over recommended operating conditions unless otherwise speci?ed - t a = 25c) absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditions is not implied. continuous operation of the device at the absolute rating level may affect device reliability. all voltages are referenced to device gnd. r ds(on) on-resistance of switching transistor - - 6.0 i = 100ma i in v dd supply current (including inductor current) - 35 45 ma v in = 1.5v. see fig.1 i ddq quiescent v dd supply current - - 100 na rsw-osc = low v cs output voltage on cs 75 80 85 v v dd = 1.8 - 3.5v v a-b differential output voltage across lamp 150 160 170 v v dd = 1.8 - 3.5v f el v a-b output drive frequency 300 375 450 hz v in = 1.5v. see fig.1 f sw switching transistor frequency - 80 - khz v in = 1.5v. see fig.1 d switching transistor duty cycle - 88 - % see fig.1 recommended operating conditions v dd supply voltage 1.8 - 3.5 v --- f el v a-b output drive frequency 60 - 1000 hz --- t a operating temperature -25 - +85 o c --- enable/disable function table en-l logic input low voltage 0 - 0.5 v v dd = 1.8 - 3.5v en-h logic input high voltage v dd -0.5 - v dd v v dd = 1.8 - 3.5v pin con?guration lx cs rsw -osc vdd rel-osc va vb gnd 1 2 3 4 5 6 7 8 8-lead soic (lg) / 8-lead msop (mg) (top view) product marking 8-lead soic (lg) 8-lead msop (mg) y = last digit of year sealed ww = week sealed l = lot number = green packaging yww hv826 llll device package options 8-lead soic 4.90x3.90mm body 1.75mm height (max) 1.27mm pitch 8-lead msop 3.00x3.00mm body 1.10mm height (max) 0.65mm pitch hv826 hv826lg-g HV826MG-G -g indicates package is rohs compliant (green) ordering information package may or may not include the following marks: si or package may or may not include the following marks: si or
3 hv826 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com fig.1: typical application typical performance lamp size v in i in v cs f el brightness 1.6in 2 1.5v 35ma 66v 345hz 5.00ft-lm notes: * murata part # lqh4n221k04 (dc resistance < 14.5) el lamp + _ 0.1f 100v v in l x * 220h 1n4148 4.7f 1.0m 560k enable signal on = v dd off = 0 v dd = 3.0v hv826 1 7 2 3 4 8 6 5 lx gnd vb va rel-osc vdd rsw -osc cs v cs vs v in 0 20 40 60 80 100 1 2 3 4 v in (v ) v cs (v) i in vs v in 1 2 3 4 v in (v ) i in (ma) brightness vs v in 0 2 4 1 2 3 4 v in (v ) brightness (ft-lm) i in vs v cs 0 10 20 30 40 60 70 80 90 v cs (v) i in (ma) i in , v cs , brightness vs inductor value v dd = 3.0v, v in = 1.5 v 0 10 20 30 40 50 60 70 80 90 10 0 2 20 33 0 5 60 90 0 inductor value (h) 0. 0 1. 0 2. 0 3. 0 4. 0 5.0 brightness (ft-lm ) i in (ma) v cs (v) brightness (ft-lm) i in (ma), v cs (v) 0 10 20 30 40 6 6.0 typical performance curves for fig.1 (1.6in 2 lamp)
4 hv826 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com fig.2: typical application (v in = 3.0v = v dd ) typical performance lamp size v in i dd v cs f el brightness 3.0in 2 3.0v 23ma 80v 195hz 4.0ft-lm notes: * murata part # lqh4n561k04 + _ 0.1f 100v v in = v dd l x * 560h 1n4148 4.7f 2.0m 750k enable signal on = v dd off = 0 hv826 1 7 2 3 4 8 6 5 2.0k 10nf equivalent to 3in 2 lamp lx gnd vb va rel-osc vdd rsw -osc cs v cs vs v in 0 20 40 60 80 100 1 2 3 4 v in (v ) v cs (v) i in vs v in 0 5 10 15 20 25 1 2 3 4 v in (v ) i in (ma) brightness vs v in 0 1 2 3 4 5 1 2 3 4 v in (v ) brightness (ft-lm) i in vs v cs 0 5 10 15 20 25 50 60 70 80 90 v cs (v) i in (ma) i in , v cs , brightness vs inductor valu e 0 10 20 30 40 50 60 70 80 90 10 0 3 30 47 0 5 60 90 0 inductor value (h) 0. 0 1. 0 2. 0 3. 0 4. 0 5. 0 brightness (ft-lm) i in (ma) v cs (v ) brightness (ft-lm) i in (ma), v cs (v) typical performance curves for fig.2 (3.0in 2 lamp)
5 hv826 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com 8-lead soic (narrow body) package outline (lg) 4.90x3.90mm body, 1.75mm height (max), 1.27mm pitch 1 8 seating plane gauge plane l l1 l2 e e1 d e b a a2 a1 seating plane a a to p v iew side v iew vi ew b vi ew b 1 note 1 (index area d/2 x e1/2) vi ew a-a h h note 1 symbol a a1 a2 b d e e1 e h l l1 l2 1 dimension (mm) min 1.35* 0.10 1.25 0.31 4.80* 5.80* 3.80* 1.27 bsc 0.25 0.40 1.04 ref 0.25 bsc 0 o 5 o nom - - - - 4.90 6.00 3.90 - - - - max 1.75 0.25 1.65* 0.51 5.00* 6.20* 4.00* 0.50 1.27 8 o 15 o jedec registration ms-012, variation aa, issue e, sept. 2005. * this dimension is not speci?ed in the jedec drawing. drawings are not to scale. supertex doc. #: dspd-8solgtg, version i041309. note: this chamfer feature is optional. a pin 1 identi?er must be located in the index area indicated. the pin 1 identi?er can be: a molded mark/identi?er; an embedded metal marker; or a printed indicator. 1.
supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such appl ications unless it receives an adequate product liability indemnification insurance agreement. supertex inc. does not assume responsibility for use of devices described, and limits its liabilit y to the replacement of the devices determined defective due to workmanship. no responsibility is assumed for possible omissions and inaccuracies. circuitry an d specifications are subject to change without notice. for the latest product specifications refer to the supertex inc . (website: http//ww w. supertex.com ) ?2009 supertex inc. all rights reserved. unauthorized use or reproduction is prohibited. supertex inc. 1235 bordeaux drive, sunnyvale, ca 94089 te l: 408-222-8888 www .supertex.com 6 hv826 (the package drawing(s) in this data sheet may not re?ect the most current speci?cations. for the latest package outline information go to http://www.supertex.com/packaging.htm l .) doc.# dsfp-hv826 a100809 8-lead msop package outline (mg) 3.00x3.00mm body, 1.10mm height (max), 0.65mm pitch 1 8 seating plane gauge plane l l1 l2 e e1 d e b a a2 a1 seating plane a a to p v iew side v iew vi ew a-a vi ew b vi ew b 1 (x4) note 1 (index area d/2 x e1/2) symbol a a1 a2 b d e e1 e l l1 l2 1 dimension (mm) min 0.75* 0.00 0.75 0.22 2.80* 4.65* 2.80* 0.65 bsc 0.40 0.95 ref 0.25 bsc 0 o 5 o nom - - 0.85 - 3.00 4.90 3.00 0.60 - - max 1.10 0.15 0.95 0.38 3.20* 5.15* 3.20* 0.80 8 o 15 o jedec registration mo-187, variation aa, issue e, dec. 2004. * this dimension is not speci?ed in the jedec drawing. drawings are not to scale. supertex doc. #: dspd-8msopmg, version h041309. note: a pin 1 identi?er must be located in the index area indicated. the pin 1 identi?er can be: a molded mark/identi?er; an embedded metal marker; or a printed indicator. 1.
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