LB8109M

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 ...

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SeekIC No. : 004391286 Detail

LB8109M: 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)...

floor Price/Ceiling Price

Part Number:
LB8109M
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/10/30

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Product Details

Description



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 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.




Pinout

  Connection Diagram


Specifications

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max   7 V
VCD pin input voltage VCDmax   10 V
H bridge output current IOUTmax Maximum per channel is 400 mA. 800 V
Allowable power dissipation Pdmax Independant IC 700 w
Operating temperature Topr   20 to +75 °C
Storage temperature Tstg   55 to +150 °C



Description

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).




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