Ordering number: EN5233 Monolithic Digital IC LB8109M Actuator Driver for Portable CD Players Overview The LB8109M is an actuator driver IC designed for portable CD players that operate at 2.4 V (two Ni-Cd batteries) or 3.0 V (two dry cells). Package Dimensions unit : mm 3148-QIP44MA [LB8109M] SANYO : QIP44MA Functions and Features . H bridge drivers (output dynamic range maximum is about 2 V) on chip for four channels to drive each CD actuator (the focus the tracking coil, the spindle motor, and the sled motor). . coil, Step-up circuit (voltage to be set by an external resistor) on chip that is used to apply voltage to the CD DSP, ASP and . . . . . . . . . . microcontroller. Center-tap coil for step-up circuit makes it possible to supply the driver control voltage. (However, the drive Tr, L, C, and Di are all external.) Oscillator circuits for each converter on chip. (C and R are external.) Four-channel driver control output is divided into two groups (the focus/tracking group and the spindle/sled group) for minimum loss at double-speed play. Higher operating voltage in each group is converted to power supply of each 2ch H bridge driver by PMW conversion. (However, the PWM PNP-Tr, NPN-Tr, L, C, and Di are all external.) Sled motor driving mode is switchable between step drive mode for lower power dissipation, and normal V-type drive mode. (The other three channels are fixed to V-type.) In the spindle motor drive circuit, the control gain can be doubled for double-speed play. (Switching port provided.) PWM step-down circuit for external power operates when external power (8 V or more) is supplied. In this function, external power is converted to VCC power supply, and two type voltage setting is possible. In play mode, step-up voltage for DSP has to be set lower than VCC, but in charging the battery, it has to be set higher than VCC. So step-down voltage (VCC) setting of two types is possible with two pairs of external resistor. (Switching port is provided.) (However, the PWM PNP-Tr, NPN-Tr, L, C, and Di are all external.) Battery pulse charging function on chip. (However, the drive NPN-Tr, and the current feedback C and R are external.) Having one 358-type OP amplifier on chip, it is suitable for a variety of applications. (Power supply: VCD) The system can be started up and stopped by outputs from the microcontroller. Actuator muting function on chip (for all four channels simultaneously). Thermal shutdown circuit on chip. SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 13096HA (II) No.5233-1/9 LB8109M Specifications Absolute Maximum Ratings at Ta = 25 °C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCCmax 7 VCD pin input voltage VCDmax 10 V H bridge output current IOUTmax Maximum per channel is 400 mA. 800 mA Allowable power dissipation Pd max Independant IC V 700 mW Operating temperature Topr –20 to +75 °C Storage temperature Tstg –55 to +150 °C Ratings Unit Allowable Operating Ranges at Ta = 25°C Parameter Symbol Conditions Supply voltage VCC 1.6 to 5.0 V VCD pin input voltage VCD 3.6 to 9.0 V VCC(EXT) 3.0 to 5.0 V VCC drop setting voltage when external voltage input is applied Electrical Characteristics at Ta = 25 °C, VCC = 3 V, VCD = 4 V Parameter Symbol [Power Supply Block] Standby current drain ICCO VCC no-signal current drain ICC VCD no-signal current drain ICD [Externally set step-up circuit] ASP drive output current IO ASPDRV Reference voltage of step-up Vref ASP circuit IB V ASP VASP pin input bias current UPBASE pin saturation VO UPBASE voltage Load regulation RLD ASP Line regulation RLN ASP Minimum off duty Dmin ASP [S/S Pin Function] S/S start voltage VSSON S/S off voltage VSSOFF [H Bridge Output Block, PWM Block] Output saturation voltage VH sat VOUT pin maximum output VOUT max voltage PWM applied offset voltage VPWMOFF DNB – 1,2 pins output current Io DNB1,2 Load regulation RLDVOUT Line regulation RLNVOUT [Drive Control Block] CH1 to 4 input voltage range VIN1–4 ASP REF input voltage range VASPR Input bias current IB IN Input offset voltage Voff IN CH1,2,4 transfer gain G124IN CH3 L side transfer gain G3LIN CH3 H side transfer gain G3HIN Conditions min S/S = [H], the total of VCC and VCD S/S = [L], VCC line only S/S = [L], with no driver input typ max Unit 7.0 5.0 20 10.0 8.0 µA mA mA 2.2 2.8 3.4 mA 1.23 1.28 1.33 V VASP = 1.5 V 200 nA IO = 1 mA 0.2 V VASP = 1 V Determined at ASP drive pin VASP = 3.5 V, L = 30 µH, C = 220 µF VASP = 3.5 V, L = 30 µH, C = 220 µF 20 1000 mV/A 100 mV/V % VCC–1.0 V V 0.45 V VCC–0.5 IO = 200 mA, TOP + BOTTOM 0.30 2.25 At mute state (each output = 0) 0.23 VOUT = max, L = 30 µH VOUT = max, L = 30 µH 0.5 1.2 Each VIN = VASP REF = 2 V VASP REF = 2 V RL = 10 Ω RL = 10 Ω RL = 10 Ω –30 7.1 7.1 13.6 0.26 VOUT/600 V 0.29 V A 1000 mV/A 100 mV/V VCD–0.5 VCD–1.3 2.0 +30 8.3 9.5 8.3 9.5 14.8 16.0 V V µA mV dB dB dB Continued on next page. No.5233-2/9 LB8109M Continued from preceding page. Parameter Negative/positive transfer gain difference Symbol ∆GIN RL = 10 Ω Input dead zone voltage range VDZ RL = 10 Ω, output voltage difference 5 mV or less G-SELECT pin low-gain side selection voltage G-SELECT pin high-gain side selection voltage [SLED Drive Circuit] SL REF pin input voltage range SL REF pin input bias current Positive side setting offset voltage between IN4 and SL REF Dual side step width difference voltage SL MODE pin high voltage SL MODE pin low voltage [Muting Block] Mute on voltage Mute off voltage [OP Amplifier Block] Input offset voltage Input bias current for each input Common-mode input voltage range Open-loop voltage gain [External Voltage Input Block] Minimum operating input voltage when external voltage input is applied EXTDRV pin output current VZ pin voltage VZ pin inflow current VEXT, VEXT-CHG pin Input bias current VEXT, VEXT-CHG pin Step-up circuit reference voltage EXTBASE pin saturation voltage [OSC Block] OSCPWR pin output voltage Maximum oscillation frequency Input bias current [Pulse Charging Function] Internal reference voltage CHG-ON pin ON voltage CHG-ON Pin OFF voltage CHG-MON pin input bias current CHGDRV pin output current [TSD Block] Operating temperature Temperature hysteresis width Conditions min typ –1.0 0 0 Unit +1.0 dB 30 mV 2.0 VGSELL-TH V VGSELH-TH VASP REF+0.1 VSL REF IB SL REF max VSL REF = 2 V 1.0 V VCD–1.0 V 200 nA Voff SL REF VSL REF = 2.3 V, VASP REF = 2 V –20 +20 mV VSL DIFF VSL REF = 2.3 V, VASP REF = 2 V –25 +25 mV 1.0 V V 1.0 V V +5 mV 200 nA VCD–1.5 V 37 dB VH SL MODE VL SL MODE 2.0 VON MUTE VOFF MUTE 2.0 VOFF OP –5 IB OP OPin(+) = OPin(–) = 2 V VCM OP GV OP at f = 10 kHz 31 VI EXT RIN = 1 kΩ 8.0 VEXT = 1 V (CHG-ON [L]) VEXT = 10 V, RIN = 1 kΩ 170 6.4 IO EXT DRV VZ IVZ IB EXTCHG IB EXT VEXT = 1.5 V VEXT-CHG = 1.5 V (CHG-ON [H]) VrefE-CHG Vref EXT Both determined at EXTDRV pin EXT-CHG side: CHG-ON [H] VEXTBASE IO = 1 mA VOSCPWR FOSC max IB OSC V 210 6.9 1.28 250 7.4 20 µA V mA 200 nA 1.33 V 0.2 V 100 V kHz µA VCC–0.15 VOSC = 0 V VCHG REF VCHG-ON VCHG-OFF –2.0 0.32 2.0 IB CHG MON VCHG MON = 0.3 V IO CHG DRV VCHG MON = 0 V TTSD ∆TTSD 1.23 34 Design target value, Note 1 Design target value, Note 1 2.4 0.35 3.0 0.38 1.0 V V V 200 nA 3.6 mA 180 20 °C °C Note 1: For parameters which have an entry of ‘‘design target value’’ in the ‘‘Conditions’’ column, no measurements are made. No.5233-3/9 Allowable power dissipation, Pd max — W LB8109M Pd max — Ta Ambient temperature, Ta — °C Pin Assignment No.5233-4/9 LB8109M Pin Functions Pin No. 1, 2 32, 33 Symbol Equivalent circuit IN1, IN2 IN3, IN4 Actuator control signals for each driver: IN1: Focus, IN2: Tracking, IN3: Spindle, IN4: Sled. These signals are input from the ASP (DSP). to 30 Function ASPREF Control reference signal input pin for each driver. This signal is input from the ASP (DSP). 43, 42 OUT1+, 1– 41, 40 OUT2+, 2– 38, 37 36, 35 OUT3+, 3– OUT4+, 4– Focus coil actuator drive output pins. Tracking coil actuator drive output pins. Spindle motor drive output pins. Sled motor drive output pins. (Each channel includes built-in spark killer diodes.) 3 31 VOUT1 VOUT2 Power supply pins for the H bridge driver. VOUT1 is for the focus/tracking group and VOUT2 is for the spindle/sled group. Maximum value + α (α : saturation voltage of upper/lower output Tr) of control output for each 2CH is set by external PWM step-down circuit. 4 VCD Power supply for the actuator driver controller, maximum value circuit for PWM, sled controller, and MUTE block. 5 CHGDRV Base drive output pin for the external NPN-Tr for the battery pulse charging circuit. 10 EXTDRV Base drive output pin for the external step-down NPN-Tr used when external voltage input is applied. 15 DNB-1 16 DNB-2 Constant current value of each Base drive output pin for the PNP-Tr for the step-down PWM that generates the power supply for the H bridge driver that drives the focus/tracking group actuators. Constant-current circuit which changes with the input of CH1 through 4. (3 mA max) 17 ASPDRV Base drive output pin for the PNP-Tr for the step-down PWM that generates the power supply for the H bridge driver that drives the spindle/sled group actuators. Base drive output pin for the external NPN-Tr for the step-up circuit that sets the external voltage for the DSP. Continued on next page. No.5233-5/9 LB8109M Continued from preceding page. Pin No. Symbol Equivalent circuit Function 6 CHG MON Constant-current feedback input pin for the charging circuit. The charging current is determined by comparing this input voltage and the internal reference voltage (0.35 V typ.). 13 EXTBASE Connection pin for the resistor that is used to set the voltage for the external step-down circuit. This prevents invalid current at no power supply. 7 GND GND pin for small-signal block. (GND except output power Tr) 8 OSC Input pin for the free-running oscillation circuit that is used to operate the PWM step-down circuit and step-up circuit. The oscillating frequency is determined by external CR. 9 OSCPWR CR power supply pin that is used to prevent invalid current for the oscillation circuit in standby mode. 11 VEXT Voltage feedback input pin for the external power supply step-down circuit. VCC for playback is set by comparing this pin voltage with the internal reference voltage (1.28 V typ.). 12 VEXTCHG Voltage feedback input pin for the external power supply step-down circuit. VCC for charging is set by comparing this pin voltage with the internal reference voltage (1.28 V typ.). 18 VASP Voltage feedback input pin for the step-up circuit. The step-up voltage is determined by comparing this pin voltage with the internal reference voltage (1.28 V typ.). 19 UPBASE Connection pin for the resistor that is used to set the voltage of the step-up circuit. This prevents invalid current in standby mode. Continued on next page. No.5233-6/9 LB8109M Continued from preceding page. Pin No. 20 Symbol Equivalent circuit Function VZ Zener diode Reference voltage startup circuit S/S function shant External power input Forced startup Input pin for start-up circuit when an external voltage input is applied. The external voltage input is applied through a resistor inserted in series. The voltage is basically determined by the Zener diode + 2VBE; this pin has a current draining capacity up to 20 mA. 24 S/S LB8109M start-up input. (Start on a low-level input.) 21 OPIN− Inverting input pin for internal OP amplifier. 22 OPIN+ Noninverting input pin for internal OP amplifier. 23 OPOUT Output pin for internal OP amplifier. The output circuit type is ‘‘push-pull.’’ 14 CHG-ON Pin for selecting battery charging when external voltage input is applied. This pin determines the drop voltage for the external voltage input. When low, the drop voltage set by VEXT is selected; when high, the drop voltage set by VEXT-CHG is selected. 25 MUTE Input pin for simultaneously muting the drivers for the four channels. (High: mute) 26 G-SELECT Pin for switching the spindle driver transfer gain between 8.3 dB and 14.8 dB (typ. value each). (Low: high gain) 27 SLMODE Pin for switching the sled driver between V-type control and step control. (High: V-type control; low: step control) 28 VCC Power supply voltage pin. 29 33 SLREF IN4 Threshold input pin for driving the sled motor stepwise. Both the positive and negative step levels (with positive-negative symmetry) are determined by the voltage differential between the pin voltage and the ASPREF pin voltage. 39 PGND Output Tr. GND for the fourchannel H bridge drivers. This pin is not internally connected to the small-signal system GND. Continued on next page. No.5233-7/9 External power input Jack Battery Using high hfe Current feedback resistance Bias to internal block Forced start-up control Power supply to control stage (Shaded blocks) Offset Approx. 0.3 V S/S trigger control Error amplifier Clamp Dead time Sawtooth waveform oscillation circuit Start-up S/S reactive output 1.2 V output Spindle and sled Error amplifier Buffer Start-up with external voltage input Dual-side step drive circuit Inversion detection Offset Bidirectional SW & Drive control Abs. value amp. Oscillation blocking Maximum value circuit Op amp. Bidirectional SW & Drive control Abs. value amp. Oscillation blocking Battery pulse charging circuit Dead time Error amplifier Error amplifier Judge ext. power/battery Clamp Focus & Tracking Buffer Maximum value circuit Bidirectional SW & Drive control Abs. value amp. Dead time Thermal circuit Error amplifier Mute circuit Bidirectional SW & Drive control Abs. value amp. Oscillation blocking Note: It should be noted that Type Nos., contants specified herein are for example only, with no guarantee for characteristics implied. Approx. 3.3 V Approx. 4.3 V Coil with center tap Playback setting Supply (approx. 3.5 V) to DSP, ASP, etc. Set when charging Oscillation blocking ASP power supply LB8109M Block Diagram and Sample Application Circuit No.5233-8/9 LB8109M Supplementary Explanation 1. 2. VCD supply The VCD line is the power supply for the driver control blocks of channels 1 to 4. The VCD line can be supplied from the DSP step-up circuit by using a coil with center tap (as shown in the Block Diagram). However, because the allowable operating range for VCD is 3.6 V to 9.0 V, it is recommended that in order to reduce power dissipation, the voltage should be set to the low end of this range. (Even if this power supply does not affect the control performance such as the transfer gain.) Sled step drive Stepping control in this IC for the sled actuator is as described below. Normal V-type control is used if the SLMODE pin is set high, but by setting this pin low it is possible to use step drive mode, which has a marked effect in reducing power dissipation. (This only affects channel 4.) The step drive starting level is input from the SLREF pin (only a voltage higher than ASPREF will be accepted), and the positive side step start is determined by comparing the input voltage with IN4. For the negative side, the step start is determined automatically by setting the differential voltage between the SLREF and the ASPREF on the opposite side, and then comparing that voltage to IN4. In other words, the control characteristics become as defined by the solid line in the diagram below. (The rise on the positive and negative steps has no hysteresis.) Voltage between outputs SLREF (greater than ASPREF) If this voltage is set, the negative side step start is determined automatically by setting the differential voltage betwwen SLREF and ASPREF on the opposite side as well. No 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. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 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: 2 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. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of January, 1996. Specifications and information herein are subject to change without notice. No.5233-9/9