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da6240c.000 1 november, 2010 1 (11) MAS6240C piezo driver with multi-mode charge pump ? both single ended and differential output ? three-step volume adjusting ? up to 18vpp output from 3v supply ? one wire audio & shutdown control ? high efficiency ? solution without inductors ? low external part count description mas6240 is a piezo driver device that can drive outputs up to 18vpp from 3v supply. an internal thr ee- mode charge pump generates boosted supply voltage for piezo driver. for adjusting the piezo element s ound volume, the charge pump can operate in either of a 1x, 2x or 3x mode. in 1x mode the output voltage is same to the input voltage, in 2x or 3x mode the inp ut voltage is boosted up accordingly 2 or 3 times. cha rge pump mode is selected by control pins en1 and en2 (see table 1 on page 2). mas6240 is an easy and low-cost solution for piezo driver, since only 4 small value capacitors are nee ded in addition to sound element - the use of inductors can be avoided. the inductorless design also causes significantly less disturbance to the surrounding circuits making it an ideal choice for sensitive de signs. its charge pump switches at 1mhz, allowing to using as small as 100nf external capacitors. control logic is switching the charge pump on at fi rst rising signal of digital input (din) pin. the switc h-off signal will be generated while the signal at din ha s been at low mostly for 50ms. the piezo driver is enabled at a second rising edge of a pulse at din a nd the signal is transferred to piezo output vo1. the same signal is inverted into output vo2 for using differential output. continuous logic high level at din input causes the charge pump to be turned on but leaves the audio amplifier disabled. in that state the charge pump output can be used to power the external leds or an y other external circuit. the output voltage is still selectable at three steps. in "disabled" mode (din has been low for 15ms typically) all functional blocks are switched off t o achieve the quiescent current less than 1 a. two qfn packaged device versions are available. c1 version has short circuit protection which limits i nput current taken from the supplies. it is suitable for driving piezo in single ended configuration. c2 ver sion does not have input current limitation but it provi des maximum output current drive capability and loudest sound pressure level. it is suited for driving piez o in both single ended and differential configurations. in the die form version d1 the input current limitatio n is selectable by bonding. features applications piezo driver & charge pump ? thin 0.75 mm qfn 12 package ? three-step volume adjusting ? both single ended and differential output ? up to 18vpp output from 3v supply ? one wire audio & shutdown control ? low external part count ? solution without inductor ? wrist watches ? alarm clocks ? handheld gps devices ? pdas ? portable device with sound feature ? 1 mhz switching frequency ? multi-mode charge pump (1x/2x/3x)
da6240c.000 1 november, 2010 2 (11) block & application diagram 1x/2x/3x charge pump vout cp1 cn1 vin (3v) gnd din control logic oscillator 1mhz 0.1uf 0.1uf 0.1uf en1 piezo sounder cp2 cn2 0.1uf en2 short circuit protection vo1 vo2 900k pull down resistor MAS6240C1/c2 figure 1: c1 or c2 version charge pump + single end piezo driver (max 9vpp) 1x/2x/3x charge pump vout cp1 cn1 vin (3v) gnd din control logic oscillator 1mhz 0.1uf 0.1uf 0.1uf en1 piezo sounder cp2 cn2 0.1uf en2 short circuit protection vo1 vo2 900k pull down resistor MAS6240C2 figure 2: c2 version charge pump + differential pie zo driver (max 18vpp) table 1 charge pump boosting mode selection din en1 en2 charge pump 0 - - off 1 0 0 off 1 0 1 1x mode (vin) 1 1 0 2x mode (2xvin) 1 1 1 3x mode (3xvin) note: pulsed signal at digital input din is taken as ?1? if pulse low time is less than 5 ms!
da6240c.000 1 november, 2010 3 (11) absolute maximum ratings parameter symbol conditions min max unit supply voltage vin charge pump in 1x mode. charge pump in 2x or 3x mode. -0.3 -0.3 5.5 4.0 v outputs and flying capacitors pins voltages vout, cp2, vo1, vo2 -0.3 12 v cp1, cn2, -0.3 8 v voltage range for input pins din, en1, en2, cn1 -0.3 vin + 0.3 v vout short-circuit duration t sc valid for c1 version which has short circuit limitation. indefinite storage temperature -55 +150 o c esd rating human body model (hbm) 2 kv note: stresses beyond the values listed may cause a perm anent damage to the device. the device may not operate under these conditions, but it will not be destroyed. recommended operating conditions all voltages with respect to ground. parameter symbol conditions min typ max unit operating junction temperature t j -40 +125 c operating ambient temperature t a -40 +27 +85 c operating supply voltage v in 2.2 3.0 3.3 v
da6240c.000 1 november, 2010 4 (11) electrical characteristics t a = -40c to +85c, typical values at t a = 27c, v in = 3.0 v, c 1 = 100 nf, c 2 = 100 nf, c out = 100 nf, c in = 100 nf, c piezo = 15 nf, digital input din=4khz; unless otherwise specified parameter symbol conditions min typ max unit output voltage vout vout pin voltage towards ground at vin = 3 v c1 version: load 0? 2 ma c2 version: load 0?5ma 1x mode 2x mode 3x mode 2.8 5.2 7.2 3 6 9 v current consumption i cc charge pump (no load): 1x mode 2x mode 3x mode 85 800 2100 150 1500 3000 a single ended application (c piezo = 15nf; f=4khz): 1x mode 2x mode 3x mode 0.3 1.7 4.2 ma differential application (c piezo = 15 nf; f=4khz): 1x mode 2x mode 3x mode 0.8 3.5 8.2 ma signal frequency f audio 0.2 4 8 khz shutdown current i sd din = 0v, note 1 1 a internal switching frequency (charge pump) f osc 0.6 1 1.8 mhz vout turn-on time (from din signal high to 90% vout steady state) t on c1 version 1x mode 2x mode 3x mode 10 130 400 100 300 800 s c2 version 1x mode 2x mode 3x mode 6 30 60 100 200 300 s shut down delay t off time before device shutdown after din signal goes to low 5 15 50 ms short circuit current limit i sc from vin pin c1 version c2 version 5 10 50 150 ma control input threshold v ih v il en1, en2, din pins 1.6 0.55 v v control input current i ih i il v din = 3v, (900k pull down) v din = 0v 3.4 0 7 1 a a i ih i il v din = 3v v en1,en2 = 3v, (900k pull down) v en1,en2 = 0v 3.4 0 7 1 a a i ih i il v din = 0v, note 2 v en1,en2 = 3v v en1,en2 = 0v 0 0 1 1 a a note 1: din has been low at least 50 ms. note 2: en1 and en2 pins are at high-z state while v din =0v.
da6240c.000 1 november, 2010 5 (11) pin description pin description symbol type x-coordinate y-coordina te control signal input for setting charge pump mode e n1 di 121 695 control signal input for setting charge pump mode e n2 di 121 527 enable signal + digital signal input din di 121 360 flying capacitor negative terminal cn1 i/o 403 121 supply ground gnd g 574 121 digital audio signal output vo2 do 765 201 digital audio signal output vo1 do 929 407 flying capacitor negative terminal cn2 i/o 929 529 flying capacitor positive terminal cp1 i/o 929 682 charge pump output vout ao 684 849 flying capacitor positive terminal cp2 i/o 570 849 power supply vin p 393 929 control signal for current limitation c1 current limitation on: xcurl=floating or gnd c2 current limitation off: xcurl=vin xcurl di 285 929 g = ground, p = power, d = digital, a = analog, i = input, o = output. note: because the substrate of the die is internally conn ected to gnd, the die has to be connected to gnd or left floating. please make sure that gnd is the fir st pad to be bonded. pick-and-place and all compone nt assembly are recommended to be performed in esd pro tected area. note: pad coordinates are measured from the left bottom corner of the chip to the center of the pads. the coordinates may vary depending on sawing width and location, however, distances between pads are accur ate. ic outlines en1 en2 din cp1 cn2 vo1 vo2 vin cp2 vout gnd cn1 id: mas6240d1 1050 ? m 1130 ? m xcurl die size = 1130 x 1050 mm; pad size = 80 x 80 m
da6240c.000 1 november, 2010 6 (11) detailed description mas6240 first pulse skipping -1 0 1 2 3 4 5 6 7 8 9 10 -20 0 20 40 60 time [ms] voltage [v] vo1 din figure 3: enabling output vo1 the piezo driver is enabled at the second rising ed ge of the pulse at din, thus the signal is transfer red to the piezo output vo1. an output vo2 is enabled at the s ame time, but it is optional to take it in use. con trol logic is switching the charge pump on at first rising signal of digital input din pin. if only one continuous p ulse is fed to the input din, the output vo1 is not enabled. this make it possible to control e.g. a white led or oth er device through pin vout while charge pump is enabled, with out enabling the piezo output vo1. mas6240 first pulse skipping & power down delay -1 0 1 2 3 4 5 6 7 8 9 10 -20 0 20 40 60 time [sec] voltage [v] din vo2 figure 4: disabling vo2 figure 4 is drawn in the case of vo2. the switch-of f signal will be generated after the signal at din has been low at mostly for 50 ms. in the figure 4 the switch-off delay is about 15 ms. again when new pulses are fe d into din, the charge pump and piezo driver will be enabled.
da6240c.000 1 november, 2010 7 (11) device outline configuration 1 4 7 10 1234 gcv yww qfn 3x3 12ld top marking information: 1234 = product number cv = version number g = lead free, rohs compliant package yww = year week pin nr. pin name pin nr. pin name pin nr. pin name pin nr. pin name 1 en1 4 cn1 7 vo1 10 vout 2 en2 5 gnd 8 cn2 11 cp2 3 din 6 vo2 9 cp1 12 vin
da6240c.000 1 november, 2010 8 (11) 3000 components on each reel reel material: conductive, plastic antistatic or st atic dissipative carrier tape material: conductive cover tape material: static di ssipative package (qfn 3x3x0.75 12ld) outline terminal tip package center line x or y e detail a symbol min nom max unit package dimensions a 0.700 0.750 0.850 mm a1 0.000 0.020 0.050 mm a3 0.178 --- 0.228 mm b 0.180 --- 0.280 mm d 2.950 3.000 3.050 mm d2 (exposed.pad) 1.200 --- 1.500 mm e 2.950 3.000 3.050 mm e2 (exposed.pad) 1.200 --- 1.500 mm e 0.500 bsc mm l 0.350 --- 0.450 mm dimensions do not include mold or interlead flash, protrusions or gate burrs. d/2 e / 2 seating plane a 1 side view top view d 2 d 2 / 2 e 2 / 2 e 2 b bottom view d a 3 pin 1 mark area a exposed pad shape of pin #1 identification is optional l detail a optional pin #1 identification pad 1 2 3
da6240c.000 1 november, 2010 9 (11) user direction of feed w p o p 1 d 0 x x e f t b 0 k 0 r 0.25 typ p 2 a 0 soldering information u for lead-free / green qfn 3mm x 3mm x 0.75mm resistance to soldering heat according to rsh test iec 68-2-58/20 maximum temperature 260 c maximum number of reflow cycles 3 reflow profile thermal profile parameters stated in ipc/jedec j-std-020 should not be exceeded. http://www.jedec.org lead finish 7.62 - 25.4 m, matte tin embossed tape specifications orientation on tape dimension min/max unit a o 3.30 0.10 mm b o 3.30 0.10 mm d o 1.50 +0.1/-0.0 mm e 1.75 mm f 5.50 0.05 mm k o 1.10 0.10 mm p o 4.0 mm p 1 8.0 0.10 mm p 2 2.0 0.05 mm t 0.3 0.05 mm w 12.00 0.3 mm all dimensions in millimeters
da6240c.000 1 november, 2010 10 (11) d a b c n w 1 w 2 tape slot for tape start components trailer leader carrier tape cover tape start end reel specifications dimension min max unit a 330 mm b 1.5 mm c 12.80 13.50 mm d 20.2 mm n 100 mm w 1 (measured at hub) 12.4 14.4 mm w 2 (measured at hub) 18.4 mm trailer 160 mm leader 390, of which minimum 160 mm of empty carrier tape sealed with cover tape mm
da6240c.000 1 november, 2010 11 (11) ordering information product code product package comments MAS6240C1hp06 piezo driver with multi-mode charge pump with input current limiting qfn 3x3x0.75 12ld, pb free, rohs compliant tape and reel 3000 pcs / r MAS6240C2hp06 piezo driver with multi-mode charge pump without input current limiting qfn 3x3x0.75 12ld, pb free, rohs compliant tape and reel 3000 pcs / r mas6240d1tc00 piezo driver with multi-mode charge pump, input current limiting selectable by bonding ews tested 8? wafers, thickness 395 m die size 1.13 x 1.05 mm mas6240d1tc05 piezo driver with multi-mode charge pump, input current limiting selectable by bonding 395 m thick dies in waffle pack die size 1.13 x 1.05 mm the formation of product code an example for MAS6240C1hp06: mas6240 c 1 hp 06 product name design version product version package: hp = qfn 3 x 3 x 0.75 (pb free, rohs compliant) delivery format: 00 = tested wafer 05 = tested dies 06 = tape and reel 08 = in tube local distributor micro analog systems oy contacts micro analog systems oy kutomotie 16 fi-00380 helsinki, finland tel. +358 10 835 1100 fax +358 10 835 1119 http://www.mas-oy.com notice micro analog systems oy reserves the right to make changes to the products contained in this data shee t in order to improve the design or performance and to supply the best possible product s. micro analog systems oy assumes no responsibilit y for the use of any circuits shown in this data sheet, conveys no license under any patent or other rights unless otherwise specifi ed in this data sheet, and makes no claim that the circuits are free from patent infrin gement. applications for any devices shown in this data sheet are for illustration only and micro analog systems oy makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification. these products are not designed for use in life sup port appliances, devices, or systems where malfunct ion of these products can reasonably be expected to result in personal injury . customers of micro analog systems oy using or sel ling these products for use in such applications do so at their own risk and agree to f ully indemnify micro analog systems oy for any dama ges resulting from such improper use or sale.

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