LB8106

LB8106M SANYO | Alldatasheet

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SANYO fi Actuator Driver for Portable CD Players Overview Pin Assignment The LB8106M is a four-channel actuator. driver for driving the focus coil, tracking coil, spindle motor and é 58 Q 990 ee 2 sled motor in portable CD players. ue ooBEEE 88 The LB8106M features a 3.9 V (typ) output up con- Ns U0 Ne verter, an integrating amplifier to allow the future use of Ne =n a digital servomotor for the spindle, and a battery check veos veces comparator. It supports system startup and stop func- veo: Co} f= ais tions, a selectable sled actuator driver step mode for i a =Fr) reduced power consumption, and a defect function to we EE vere improve tracking when there is a disk fault, wo She The LB8106M operates from a 2.0 to 4.0 V supply and ose MUN Unn ae is available in 44-pin QIPs, eees an poaggggegee 8 2 Features 8 * Four H-bridge actuator drivers for the focus coil, tracking coil, spindle motor and sled motor Package Dimensions * On-chip 3.9 V (typ) up converter 9 * System startup and stop functions Unit: mm * Selectable sled actuator driver step mode * On-chip battery check comparator 3148-QIP44MA * PWM power supply reduces power consumption, 492 noise and the number of external components 104 16 oat required. . . Tgqggqqqnan L * On-chip integrating amplifier for future digital spindle ————E—_E_r servomotor == =a * Defect function to improve tracking when there is a = F= 0.26 disk fault 2 0 Se =a * 2.0 to 4.0 V supply =| Ef © 44-pin QIP mn B= 12 TARA AATF HHOUOUUDODUD J woh od dL SANYO Electric Co.,Ltd. Semiconductor Business Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 01694TH(ID)/7012TS No. 4105—1/10

eSeSSSSSSSSSSSSSSSsssssssssSsSsSSSSsSSSsSSsSsssSSsSsSSsSsssssssssseeee Sample Application Circuit vec 390p 1k | ASP I. ang 7 uo fo_fe_ir fs Js ic [a |e fre

12 We] osc Pow ey = FB © OUT laa FOCUS

Tr 3] UPB ° ouri- ia Marcon om S/S} ourz 10 Jor 14] 42 KEY Input ot sca wry ike 15] {s | GF) Ger) ig ete LB8106M cob G GEF) sont] oF , oe we outs! i 10 Jo.1ue Merron BO ouT3~ iw = Veo 29 |* w B) outst 10 [oy 11 ai] . in 4 Bos .oun- ig SLED ; oee<s yg Bz 3 4 5p Uy D1 | 23 ss 2 Fa aw = 2 2 2 fu ‘fe fe [es ae | fe fs bo [a fae u +o asp 47K . C1 Tak 10m A aD A 33k 2.2k 22k psp Microcontroter ‘Unit (resistance: 2, capacilance: F) Notes . 1, T1 is a 2SB815, T2 is a 2SC3650, D1 and D2 are $BO7-03Cs, L1 = L2 = 30 pH and Cl = C2 = 100 uF. 2, Values shown are for reference only. 3. When using a digital spindle servomotor, connect the PWM output to IAI, set the integration constant using external components and connect AO to the spindle servomotor input. SSeS No. 4105—2/10

DEFECT ee. 20 koa Veo tt Up converter npn-transistor driver output Veo soko

4 System startup input 1

‘Veo 50 ka 16 ‘System startup input 2 16, 17, 18 " 38, 89, 40 Frame ground eee No, 4105—3/10

‘WP @® ® Microcomputer startup output cle) CER | oo Veo 200 Battery check input 50 HA Voo 22 @ Down converter pnp-transistor driver output Veo gong = cuK @ So Clock input 80Kn 80 ka a eT Veo 50 HA sis bd Sled changeover input 80K No, 4105—4/10

a So Recommended Operating Conditions Ta = 25 °C a ee Sup vole Surly volo are

Electrical Characteristics

Voc = 2.4 V, T, = 25 °C eymba condtion oe [|| Send con cosumpin | xo [sstent sseaownars [7 [= | |_| a 2 SD No. 4105—5/10

Vov = 2.4 V, T, = 25 °C ~ ee Ot vt ee ee a fowese ye Oscillator Voo = 2.4 V, Ta = 25 °C a A OSGPOW oul vip ee od SL a H bridge Vpn = 2.4 V, T, = 25 °C Actuator drivers : Vpo = 2.4 V, Ta = 25 °C | me | mn [| mm | a CT A Tranenisonvlap go [om Ps ‘Single-channel transmission voltage +10 - gain differential . Dead band ip vole fe Pesveimee hamot [0 To Te Tow | eee : No. 4105—6/10

PWM . Vpo = 2.4 V, Ta = 25 °C : [wasinun cups etge Pw me [psi ve cunt | |Seerom T= Monto | Tm | a ee [votay otaeouitcs | atotce PT TT Note This parameter is guaranteed by the design and is not tested. Sled driver Von = 2.4 V, T, = 25 °C ee eee [paw woowe wie | wwe deve | Step mode Voo = 2.4 V, Ty = 25 °C S18 OW vote [| voom [we a [svt sore Tw Pm DEFECT OWwotee ee System startup and stop Von = 2.4 V, T, = 25 °C ee eee $81 and $82 LOW-evel input _ epee Te ee $81 and $82 HIGH-evel input _ ferrets Tome TO fee Reference voltage Vpp = 2.4 V, Ty = 25 °C pm tm om Le re OO [pera ouput ete ee Pe No. 4105—7/10

. LB8106M a Microcomputer startup Vpn = 24 V, Ty = 25 °C [wears |W mes] - | - | vd Battery check Von = 2.4 V, Ts = 25 °C a Clock . Von = 2.4 V, T, = 25 °C [ox rea wie ee Pe Pe Integrating amplifier Vop = 2.4 V, T, = 25 °C LO [iat conor won isis | - |» | - | @ | Tt gain First stage output eaturation voltage mee iad | - [| - | v fem - fp Second slg ou eaten a EE velar Le Note This parameter is guaranteed by the design and is not tested. Typical Performance Characteristics Power dissipation vs. ambient temperature aL wt [TT Td ert INE aw | | NEE ee a pot tt wt) | Toy i wt PT PP | a _[ T | Ti | a a a Aen wernt °C) Se . No. 4105—8/10

Focus, Tracking, Spindle and Sled Actuator Drivers —— cutee ‘po arpiter out The reference voltage, Vreri, from the CD player’s DSP, The V-type actuator driver, using Vreri as a reference, is boosted to 3.9 V ('Vep2). The actuator’s voltage generates a reverse polarity output. Note that there is a characteristic is shown in the following figure. dead band in the range V; = Vrem +100 mV (max) where Vo remains constant. The driver also incorporates Vo a feedback loop for accurate gain. Positve 7.95 dB plore Sled Actuator Driver Step Mode In normal operating mode, the sled actuator driver func- Dead | ¥ tions as described in the previous section. When SLS is y, LOW, however, tbe sled actuator driver is in step mode, N " and the drive current is reduced. ©, Vacrd The sled actuator control input signal is obtained by integrating the tracking output. The sled actuator starts and stops when this signal crosses thresholds determined Negative by the external resistors connected between REF] and REFO as shown in the following figure. ‘S-motor startup level j +4 ‘Tracking control input (\\ —— MY f ( \\~ input ‘S-motor stop level f f\\ Meal fp Veer val ty The voltage characteristic of the sled actuator driver in Up Converter step mode is shown in the following figure. In step mode, maximum voltage is applied to the H-bridge. The up converter steps up the supply voltage for the Note that the control input is usually lower than Var. control of each of the four actuator drivers. These drivers can also be powered externally from a supply Yo with Voo = 3.9 V (typ) and Io = 150 mA (max). At system startup, the up converter operates at the free-running frequency of the built-in oscillator. The oscillator’s free-running frequency is determined by the capacitor and resistor connected to OSCPOW. If R = Ven Yn 30 kQ and C = 400 pF, then the oscillator frequency is approximately 80 kHz. vou After system startup, the oscillator synchronizes to the extemal clock, CLK. The external clock frequency must be in the range 80 to 100 kHz. Note that 88.2 kHz is the optimum frequency. eee No, 4105—9/10

The oscillator duty cycle is limited to 50% (max), maximum efficiency, an output transistor with a high bre Protecting the output transistor under heavy load. For and a Schottky diode are recommended. PWM Power Supply To maximize power efficiency, the LB8106M uses a The output characteristic of the absolute value amplifier PWM power supply for the H-bridge drivers. The output is shown in the following figure. voltage of the absolute value amplifier for each actuator driver is summed with an offset voltage and then applied arrpir outpet to each H-bridge after PWM switching. If actuator operating voltages are similar and small, the actuators use a minimum of power. Also, only one inductor and capacitor are needed for all four actuator drivers. Since the actuator drivers are linear, output noise is Vw minimized. 2.4 V (typ) is supplied to the H-bridges and | this is only prone to small variation with fluctuations in the supply voltage. When DEFECT is HIGH, indicating the presence of a fault on the disk, or when the sled actuator driver is in step mode, the supply to each H-bridge is at maximum. System Startup and Stop The LB8106M can start and stop the system through Vem powers the integrating amplifier, the inverting connection to a microcomputer. amplifier, the sled actuator driver mode change circuit . ircuil ie rest of the Setting SS1 LOW tums system power ON and sets WP and the PWM power circuit. Voc powers th HIGH. SS2 activates the key inputs and is ORed with circuits, including the up converter, the down converter, . y mp the reference voltage regulator, the battery checker and SS1. I the oscillator. Setting both SS1 and S$2 HIGH, puts the power supply in standby mode. WENo products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss, Ml Anyone purchasing any products described or contained herein for an above-mentioned use shall: ® Accept full responsibility and indemnify and defend SANYO ELECTRIC CO, LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: ® Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO, LTD, its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Wi Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guarant- eed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees fare made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties, eee No, 4105—10/10