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LB11975

Features: • Direct PWM drive (lower side control)• Built-in upper and lower side output diodes• Supports the use 3.3 V DSP devices.• Power saving function for standby mode• Hall FG output (1 or 3 Hall device operation)• Built-in Hall device power supply• R...

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SeekIC No. : 004390984 Detail

LB11975: Features: • Direct PWM drive (lower side control)• Built-in upper and lower side output diodes• Supports the use 3.3 V DSP devices.• Power saving function for standby mode...

LB11975 Data Sheet

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Part Number:
LB11975
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

• Direct PWM drive (lower side control)
• Built-in upper and lower side output diodes
• Supports the use 3.3 V DSP devices.
• Power saving function for standby mode
• Hall FG output (1 or 3 Hall device operation)
• Built-in Hall device power supply
• Reverse rotation detection output and drive cutoff circuit
• Voltage control amplifier
• Current limiter circuit
• Thermal protection circuit


Pinout

Connection Diagram


Specifications

Parameter Symbol Conditions Ratings Unit
supply voltage 1 VCC1 max   7 V
supply voltage 2 VCC2 max   27 V
supply voltage 3 VCC3 max Capstan motor driver 27 V
Output current IO max   2.5 A
Output current VIN max   30 V
Allowable power dissipation 1 Pd max1 Independent IC 0.9 W
Allowable power dissipation 2 Pd max2 Mounted on the specified circuit board
(114.3 *76.1*1.6 mm3 glass epoxy board)		 2.1
 W
Operating temperature Topr   20 to +75 °C
Storage temperature Tstg   55 to +150 °C



Description

The LB11975 is a monolithic bipolar IC developed for uses as a spindle motor driver for high-speed CD-ROM and DVD-ROM drives. To minimize heat generation during high-speed rotation and braking, the LB11975 adopts direct PWM drive in the output stage. During reverse braking the upper and lower side output transistors are both driven in PWM mode to implement dual PWM controlled braking. The device thus controls the current to remain under a limit value and prevent rapid heat generation. This prevents device destruction due to rapid heating. The absolute maximum voltage rating is 27 V, and the maximum current is 2.5 A.




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