LB8109M

LB8109M SANYO | Alldatasheet

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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 coil, the tracking coil, the spindle motor, and the sled motor). .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 V CC 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 V CC . 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. Monolithic Digital IC LB8109M 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

Absolute Maximum Ratings a tT a=2 5°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage V CC max 7V VCD pin input voltage V CD max 10 V H bridge output current I OUT max Maximum per channel is 400 mA. 800 mA Allowable power dissipation Pd max Independant IC 700 mW Operating temperature Topr –20 to +75 °C Storage temperature Tstg –55 to +150 °C Allowable Operating Rangesat Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage V CC 1.6 to 5.0 V VCD pin input voltage V CD 3.6 to 9.0 V VCC drop setting voltage when external voltage input is appliedVCC(EXT) 3.0 to 5.0 V Electrical Characteristicsa tT a=2 5°C, VCC =3V ,V CD =4V Parameter Symbol Conditions min typ max Unit [Power Supply Block] Standby current drain I CCO S/S = [H], the total of VCC and VCD 20 µA VCC no-signal current drain I CC S/S = [L], VCC line only 7.0 10.0 mA VCD no-signal current drain I CD S/S = [L], with no driver input 5.0 8.0 mA [Externally set step-up circuit] ASP drive output current I O ASPDRV VASP = 1 V 2.2 2.8 3.4 mA Reference voltage of step-up circuit Vref ASP Determined at ASP drive pin 1.23 1.28 1.33 V VASP pin input bias current I B V ASP VASP = 1.5 V 200 nA UPBASE pin saturation voltage VO UPBASE IO = 1 mA 0.2 V Load regulation R LD ASP VASP = 3.5 V, L = 30 µH, C = 220 µF 1000 mV/A Line regulation R LN ASP VASP = 3.5 V, L = 30 µH, C = 220 µF 100 mV/V Minimum off duty D min ASP 20 % [S/S Pin Function] S/S start voltage V SS ON VCC –1.0 V S/S off voltage V SS OFF V CC –0.5 V [H Bridge Output Block, PWM Block] Output saturation voltage V H sat IO = 200 mA, TOP + BOTTOM 0.30 0.45 V VOUT pin maximum output voltage VOUT max 2.25 V PWM applied offset voltage V PWMOFF At mute state (each output = 0) 0.23 0.26 0.29 V DNB – 1,2 pins output current Io DNB1,2 V OUT /600 A Load regulation R LD VOUT VOUT = max, L = 30 µH 1000 mV/A Line regulation R LN VOUT VOUT = max, L = 30 µH 100 mV/V [Drive Control Block] CH1 to 4 input voltage range V IN1–4 0.5 V CD –0.5 V ASP REF input voltage range V ASPR 1.2 V CD –1.3 V Input bias current I BI N Each VIN =V ASP REF = 2 V 2.0 µA Input offset voltage V off IN VASP REF = 2 V –30 +30 mV CH1,2,4 transfer gain G124 IN R L =1 0Ω 7.1 8.3 9.5 dB CH3 L side transfer gain G3L IN R L =1 0Ω 7.1 8.3 9.5 dB CH3 H side transfer gain G3H IN R L =1 0Ω 13.6 14.8 16.0 dB Continued on next page. LB8109M No.5233-2/9

Continued from preceding page. Parameter Symbol Conditions min typ max Unit Negative/positive transfer gain difference ΔG IN R L =1 0Ω –1.0 0 +1.0 dB Input dead zone voltage range V DZ R L =1 0Ω , output voltage difference 5 mV or less 03 0 m V G-SELECT pin low-gain side selection voltage VGSELL-TH 2.0 V G-SELECT pin high-gain side selection voltage VGSELH-TH 1.0 V [SLED Drive Circuit] SL REF pin input voltage range VSL REF VASP REF +0.1 V CD –1.0 V SL REF pin input bias current IB SL REF VSL REF = 2 V 200 nA Positive side setting offset voltage between IN4 and SL REF V off SL REF VSL REF = 2.3 V, VASP REF = 2 V –20 +20 mV Dual side step width difference voltage VSL DIFF VSL REF = 2.3 V, VASP REF = 2 V –25 +25 mV SL MODE pin high voltage V H SL MODE 2.0 V SL MODE pin low voltage V L SL MODE 1.0 V [Muting Block] Mute on voltage V ON MUTE 2.0 V Mute off voltage V OFF MUTE 1.0 V [OP Amplifier Block] Input offset voltage V OFF OP –5 +5 mV Input bias current for each input IBO P OPin(+) = OPin(–)=2V 2 0 0 n A Common-mode input voltage range VCM OP VCD –1.5 V Open-loop voltage gain G VO P a tf=1 0k H z 3 1 3 4 3 7 d B [External Voltage Input Block] Minimum operating input voltage when external voltage input is applied V I EXT R IN =1k Ω 8.0 V EXTDRV pin output current I O EXT DRV VEXT = 1 V (CHG-ON [L]) 170 210 250 µA VZ pin voltage V Z VEXT =1 0V ,RIN =1k Ω 6.4 6.9 7.4 V VZ pin inflow current I VZ 20 mA VEXT ,V EXT -CHG pin Input bias current IB EXTCHG IB EXT VEXT = 1.5 V VEXT-CHG = 1.5 V (CHG-ON [H]) 200 nA VEXT ,V EXT -CHG pin Step-up circuit reference voltage Vref E-CHG VrefEXT Both determined at EXTDRV pin EXT-CHG side: CHG-ON [H] 1.23 1.28 1.33 V EXTBASE pin saturation voltage VEXTBASE IO = 1 mA 0.2 V [OSC Block] OSCPWR pin output voltage V OSCPWR VCC –0.15 V Maximum oscillation frequency FOSC max 100 kHz Input bias current I B OSC VOSC = 0 V –2.0 µA [Pulse Charging Function] Internal reference voltage V CHG REF 0.32 0.35 0.38 V CHG-ON pin ON voltage V CHG-ON 2.0 V CHG-ON Pin OFF voltage V CHG-OFF 1.0 V CHG-MON pin input bias current IB CHG MON VCHG MON = 0.3 V 200 nA CHGDRV pin output current I O CHG DRV VCHG MON = 0 V 2.4 3.0 3.6 mA [TSD Block] Operating temperature T TSD Design target value, Note 1 180 °C Temperature hysteresis width ΔTTSD Design target value, Note 1 20 °C Note 1: For parameters which have an entry of ‘‘design target value’’ in the ‘‘Conditions’’ column, no measurements are made. LB8109M No.5233-3/9

Allowable power dissipation, Pd max — W Ambient temperature, Ta —°C Pd max — Ta LB8109M No.5233-4/9

Pin No. Symbol Equivalent circuit Function 1, 2 32, 33 IN1, IN2 IN3, IN4 to Actuator control signals for each driver: IN1: Focus, IN2: Tracking, IN3: Spindle, IN4: Sled. These signals are input from the ASP (DSP).

30 ASP

REF Control reference signal input pin for each driver. This signal is input from the ASP (DSP). 43, 42 41, 40 38, 37 36, 35 OUT1 +,1– OUT2 +,2– 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.) V OUT 1 VOUT 2 Power supply pins for the H bridge driver. VOUT 1 is for the focus/tracking group and VOUT 2 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. CD Power supply for the actuator driver controller, maximum value circuit for PWM, sled controller, and MUTE block.

5 CHGDRV

Constant currentvalue of each Constant-current circuit which changes with the input of CH1 through 4. (3 mA max) 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 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.

16 DNB-2 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.

17 ASPDRV 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. LB8109M No.5233-5/9

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 V EXT Voltage feedback input pin for the external power supply step-down circuit. V CC for playback is set by comparing this pin voltage with the internal reference voltage (1.28 V typ.). 12 V EXTCHG Voltage feedback input pin for the external power supply step-down circuit. V CC for charging is set by comparing this pin voltage with the internal reference voltage (1.28 V typ.). 18 V ASP 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. LB8109M No.5233-6/9

Continued from preceding page. Pin No. Symbol Equivalent circuit Function 20 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 + 2V BE ; 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 V CC Power supply voltage pin. 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 four- channel H bridge drivers. This pin is not internally connected to the small-signal system GND. Continued on next page. LB8109M No.5233-7/9

Block Diagram and Sample Application Circuit Oscillation blocking Oscillation blocking Oscillation blocking Oscillation blocking Error amplifier Error amplifier Error amplifier Error amplifier Playback setting Power supply to control stage (Shaded blocks) Note: It should be noted that Type Nos., contants specified herein are for example only, with no guarantee for characteristics implied. S/S reactive outputSawtooth waveform oscillation circuit Bidirectional SW Drive control Bidirectional SW Drive control Bidirectional SW Drive control Bidirectional SW Drive control Supply (approx. 3.5 V) to DSP, ASP, etc. Mute circuit Thermal circuit Offset Offset Buffer Buffer Coil with center tap Battery External power input Jack Using high hfe Bias to internal block Set when charging Approx. 3.3 VApprox. 4.3 V Dead time Clamp Focus & Tracking Clamp Spindle and sled S/S trigger control Approx. 0.3 V Dead time Current feedback resistance Battery pulse charging circuit Start-up with external voltage input Dead time Op amp.

1.2 V output

Judge ext. power/battery Dual-side step drive circuit Error amplifier Maximum value circuit Inversion detection Maximum value circuit LB8109M No.5233-8/9

1. V CD 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 V CD 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.) 2. 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.) 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. 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. LB8109M No.5233-9/9