cmi capella microsystems inc. 3777 stevens creek blvd., suite 320 santa clara, ca 95051 - 7364 u.s.a tel: (408) 260 - 3400 fax: (408) 248 - 3416 copyright ? capella microsy stems 1999 1 confidential CMI8804 btl driver for cd/cd - rom preliminary data sheet revision 0.1 07/16/99 this preliminary data sheet indicates that this product is still in the design cycle. all specifications are based on design goals only. capella microsystems inc . assumes no responsibility for the use of this product. capella microsystems inc. reserves the right to make changes in specifications or discontinue this product at any time without notice. please contact capella microsystems inc. for possible updates b efore starting a design. capella microsystems inc. products are not designed for use in life support applications. any parties who use these products in such applications do so at their own risk and agree to fully indemnify capella microsystems inc. for an y damages resulting from such improper usage or sale. .com .com .com 4 .com u datasheet
cmi 3777 stevens creek blvd., suite 320 santa clara, ca 95051 - 7364 u.s.a tel: (408) 260 - 3400 fax: (408) 248 - 3416 copyright ? capella microsystems 1999 2 confidential general description the CMI8804 is a silicon monolithic integrated circuit and is a four channel driver for optical disc motor drivers. the CMI8804 has a wide dynamic range of 4.0v(typ.) at prevcc= 12v, pvcc=5v, and rl=8 w . by separating the into pre+power of sled driver, power of a loading driver, and power of an actuator, the CMI8804 has made the power efficiency better by using low supply voltage. the CMI8804 has integrated and built in to itsel f a level shift circuit, a thermal - shut - down circuit, and a stand - by mode. the actuator drive is a current feedback type and the current phase lag influenced load inductance is little. on the sled motor driver, input pins consist of (+) and ( - ), which thus provides various input types, such as the differential input. the loading driver is a single input linear btl driver. features focus actuator which controls the height of the pickup to maintain the proper focus. tracking actuator which moves the pickup along the closet track. sled motor control which moves the pickup to a track other than the immediate track. tray motor control which opens and closes the tray when inserting or removing the disc. applications cd - rom drives cd drives stand-by 1 2 3 4 5 6 7 8 9 11 12 13 14 18 17 16 15 21 20 26 25 24 23 28 27 thermal shut down + - + - + - + - + - + - 10 19 22 sled driver actuator driver loading driver actuator driver + - 7.5k 10k 20k 7.5k 10k 20k 7.5k 7.5k x2 x2 det. amp det. amp 10k 25k 10k 15k pregnd pvcc2 pgnd pvcc2 pgnd pvcc1 vcc pvcc1 vcc figure 1: CMI8804 block diagram .com .com .com .com 4 .com u datasheet
cmi 3777 stevens creek blvd., suite 320 santa clara, ca 95051 - 7364 u.s.a tel: (408) 260 - 3400 fax: (408) 248 - 3416 copyright ? capella microsystems 1999 3 confidential pin description pin # pin name description pin # pin name description 1 vinfc input for focus driver 28 stby input for stand - by control 2 cfcerr1 connection with capacitor 27 bias input for referenc e voltage 3 cfcerr2 for error amplifier 26 vintk input for tracking driver 4 vinsl+ non inverting input for op - amp 25 ctkerr1 for error amplifier 5 vinsl - inverting input for op - amp 24 ctkerr2 connection with capacitor 6 vosl output of op - amp 23 vin ld input for loading driver 7 vnffc feedback for focus driver 22 pregnd gnd for pre - drive block 8 vcc vcc for pre - drive block and power block of sled 21 pvcc2 vcc for power block of actuator 9 pvcc1 vcc for power block of loading 20 vnftk feedback for t racking driver 10 pgnd gnd for power block 19 pgnd gnd for power block 11 vosl - inverted output of sled 18 vold - inverted output of loading 12 vosl+ non inverted output of sled 17 vold+ non inverted output of loading 13 vofc - inverted output of focus 1 6 votk - inverted output of tracking 14 vofc+ non inverted output of focus 15 votk+ non inverted output of tracking note: symbol of + and ? (output of drivers) means polarity to input pin. (for example, if the voltage of pin 1 is high, pin 14 is high.) absolute maximum ratings characteristic symbol rating unit supply voltage vcc, pvcc1/2 13.5 v power dissipation pd 1.7* w operating temperature topr - 35 ~ 85 c storage temperature tstg - 55 ~ 155 c * on less than 3% (percentage occupied by coppe r foil), 70x70mm 3 , t=1.6mm, glass epoxy mounting. reduce power by 13.6mw for each degree above 25 c. recommended operating conditions characteristic symbol rating unit vcc 4.3 ~ 13.2 pvcc1 4.3 ~ vcc supply voltage pvcc2 4.3 ~ vcc v .com .com .com .com 4 .com u datasheet
cmi 3777 stevens creek blvd., suite 320 santa clara, ca 95051 - 7364 u.s.a tel: (408) 260 - 3400 fax: (408) 248 - 3416 copyright ? capella microsystems 1999 4 confidential electrical characteristics (ta=25 c, vcc=12v, pvcc1=pvcc2=5v, bias=2.5v, rl=8 w w , rd=0.5 w w , c=100pf) description signal condition min typ max unit quiescent current i - 1.8 2.7 ma stand - by quiescent current i - - 0.5 ma voltage for stand - by on v ston - - 0.5 v v oltage for stand - by off v stoff 2.0 - - v actuator driver output offset current i co - 6 - 6 ma maximum output voltage v ou 3.6 4.0 - v trans conductance gm v in = bias 0.2v 1.3 1.5 1.7 a/v sled motor driver/pre op - amp common mode input range v icn - 0.3 - 11.0 v input bias current i sop - 30 300 na low level output voltage v olop - 0.1 0.3 v output source current i so 0.3 0.5 - ma output sink current i st 1 - - ma sled motor driver output offset voltage v oopsl - 100 0 100 mv maximum output volt age v omsl 7.5 9.0 - v closed loop voltage gain g vsl v in = 0.2v 18.0 20.0 22.0 db loading motor driver output offset voltage v ooplo - 50 0 50 mv maximum output voltage v ould 3.6 4.0 - v closed loop voltage gain g vld v in = bias 0.2v 13.5 15.5 17.5 db gain error by polarity d g vld v in = bias 0.2v 0 1 2 db note: for reference to electrical characteristics, see figure 4 (page 6), CMI8804 test circuit. this product is not designed for protection against radioactive rays. 25 50 75 100 125 150 175 3 2 1 0 ambient temperature - ta (c) pd (w) note: on less than 3% (percentage occupied by copper foil), 70x70mm 3 , t=1.6mm, glass epoxy mounting. figure 2: CMI8804 power dissipation/electrical characteristic curves .com .com .com .com 4 .com u datasheet
cmi 3777 stevens creek blvd., suite 320 santa clara, ca 95051 - 7364 u.s.a tel: (408) 260 - 3400 fax: (408) 248 - 3416 copyright ? capella microsystems 1999 5 confidential stand-by 1 3 4 7 8 9 11 12 13 14 18 17 16 15 21 20 24 28 thermal shut down + - + - + - + - + - + - sled driver actuator driver loading driver actuator driver + - 7.5k 10k 20k 7.5k 10k 20k 7.5k 7.5k x2 x2 det. amp det. amp 10k 25k 10k 15k pregnd pvcc2 pgnd pvcc2 pgnd pvcc1 vcc pvcc1 vcc 2 25 23 22 19 10 6 5 27 26 m m 5v or 12v 5v or 12v 12v sled motor focus coil loading motor tracking coil rd rd sled focus tracking vccenter stand-by loading dsp m -com figure 3: CMI8804 application circuit .com .com .com .com 4 .com u datasheet
cmi 3777 stevens creek blvd., suite 320 santa clara, ca 95051 - 7364 u.s.a tel: (408) 260 - 3400 fax: (408) 248 - 3416 copyright ? capella microsystems 1999 6 confidential stand-by 1 3 4 7 8 9 11 12 13 14 18 17 16 15 21 20 24 28 thermal shut down + - + - + - + - + - + - sled driver actuator driver loading driver actuator driver + - 7.5k 10k 20k 7.5k 10k 20k 7.5k 7.5k det. amp det. amp 10k 25k 10k 10k pregnd pvcc2 pgnd pvcc2 pgnd pvcc1 vcc pvcc1 vcc 2 25 23 22 19 10 6 5 27 26 a v v v a vo1 vo3 v v a vo2 vo4 v io2 8 w 8 w 0.5 w 100 m h io1 8 w 8 w 0.5 w 100 m h 5v 12v iq ioop voop vin3 vbop 1m 100pf v 1m vbop sw 1 1 2 2 vin1 5v vin4 100pf vin2 vst 2.5v figure 4: CMI8804 test circuit .com .com .com .com 4 .com u datasheet
cmi 3777 stevens creek blvd., suite 320 santa clara, ca 95051 - 7364 u.s.a tel: (408) 260 - 3400 fax: (408) 248 - 3416 copyright ? capella microsystems 1999 7 confidential switch table input voltage parameter sw vin1 vin2 vin3 vin4 vst condition measure point quiescent current 1 2.5v 2.5v 2.5v 2.5v 5.0v 1 w stand - by quiescent current 1 2.5v 2.5v 2.5v 2.5v 0. 5v 1 w voltage for stand - by on 1 2.5v 2.5v 2.5v 2.5v 0.5v 1 w voltage for stand - by off 1 2.5v 2.5v 2.5v 2.5v 2.0v 1 w actuator driver output offset current 1 2.5v 2.5v 2.5v 2.5v 5.0v vo1/2 maximum output voltage 1 0v 5v 0v 5v 2.5v 2.5v 5.0v vo1/2 t rans conductance 1 2.3v 2.7v 2.3v 2.7v 2.5v 2.5v 2.5v vo1/2 sled motor driver input bias current 2 2.5v 2.5v 2.5v 2.5v 5.0v vbop/1m low level output voltage 1 2.5v 2.5v 0v 2.5v 5.0v voop output source current 1 2.5v 2.5v 2.5v 2.5v 5.0v i oop =+0.2ma v oop output sink current 1 2.5v 2.5v 2.5v 2.5v 5.0v i oop = - 1ma voop output offset voltage 1 2.5v 2.5v 2.5v 2.5v 5.0v vo3 maximum output voltage 1 2.5v 2.5v 0v 5v 2.5v 5.0v vo3 closed loop voltage gain 1 2.5v 2.5v 2.3v 2.7v 2.5v 5.0v vo3 loading drive r output offset voltage 1 2.5v 2.5v 2.5v 2.5v 5.0v vo4 maximum output voltage 1 2.5v 2.5v 2.5v 0v 5v 5.0v vo4 voltage gain 1 2.5v 2.5v 2.5v 2.3v 2.7v 5.0v vo4 .com .com .com .com 4 .com u datasheet
cmi 3777 stevens creek blvd., suite 320 santa clara, ca 95051 - 7364 u.s.a tel: (408) 260 - 3400 fax: (408) 248 - 3416 copyright ? capella microsystems 1999 8 confidential 0.250.1 0.3 min CMI8804 28 15 1 14 5.150.1 7.50.2 18.50.2 9.90.3 2.20.1 0.11 0.8 bsc 0.40.1 0.15 figure 5: CMI8804 package dimensions (in millimeters) .com .com .com .com 4 .com u datasheet
cmi 3777 stevens creek blvd., suite 320 santa clara, ca 95051 - 7364 u.s.a tel: (408) 260 - 3400 fax: (408) 248 - 3416 copyright ? capella microsystems 1999 9 confidential note s on use: 1. thermal - shut - down circuit built - in. in case ic chip temperature rises to 175 c (typ.), thermal - shut - down circuit operates and output current is muted. next time ic chip temperature falls below 150 c (typ.), the driver blocks start. 2. in case st and - by - pin voltage under 0.5vor opened, quiescent current is muted. stand - by - pin voltage should be over 2.0v for normal application. 3. in case supply voltage falls below 3.5v (typ.), output current is muted. next time supply voltage rises to 3.7v (typ.), the driver blocks start. 4. bias - pin (pin 27) should be pulled up more than 1.2v. in case bias - pin voltage is pulled down under 0.9v (typ.), output current is muted. 5. insert the by - pass capacitor between vcc - pin and gnd - pin of ic as possible as near (approx imately 0.1 m f). 6. heat dissipation fins are attached to the gnd on the inside of the package. make sure to connect these to the external gnd. supplement current feedback driver trans conductance (output current/input voltage ) is shown as follows: 1 rd + r wire r wire 1 0.15 w ( 0.05 w ) :au wire gm = (a/v) .com .com .com 4 .com u datasheet
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