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Si9990ACS

Features: • On-Board Half-Bridge Drivers Spindle = 2.3 Total at 1 A VCM = 3.3 Total at 0.3 A• Spindle Driver Features: Back EMF Commutation Linear Current Control Internal Current Sense Resistor Start-Up Current Limit (10% Accurate)Application• Over-Temperature Protection...

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SeekIC No. : 004490998 Detail

Si9990ACS: Features: • On-Board Half-Bridge Drivers Spindle = 2.3 Total at 1 A VCM = 3.3 Total at 0.3 A• Spindle Driver Features: Back EMF Commutation Linear Current Control Internal Current...

Si9990ACS Data Sheet

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Part Number:
Si9990ACS
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: 2025/12/26

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Product Details

Description



Features:

• On-Board Half-Bridge Drivers
  Spindle = 2.3 Total at 1 A
  VCM = 3.3 Total at 0.3 A
• Spindle Driver Features:
  Back EMF Commutation
  Linear Current Control
  Internal Current Sense Resistor
  Start-Up Current Limit (10%
  Accurate)


Application

• Over-Temperature Protection
• System Voltage Monitor
• Undervoltage Head Retract
• Sleep Mode and Idle Mode
• Reference Generator
• Two Uncommitted Amplifiers


Specifications

Voltages Referenced to Common Pin
VDD Supply Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3 V to 7 V
Pin (Output A, B and C) . . . . . . . . . . . . .. . . . -0.3 V to VCLAMP + 0.3 V
Pin (Output + and -) . . . . . . . . . . . . . . . . .. . . . . -0.3 to VMOT + 0.3 V
Pin (CHS, CP1H, CP2H) . . . . . . . . . . . . . . . . .... . . . . . . .-0.3 V to 16 V
Maximum Output Currenta
Output A, B and C (Peak) . . . . . . . . . . . . . . . . . . . . . . .... .. . . . . 1.2 A
Output A, B, and C (Continuous) . . . . . . . . . . . . . . . . . . . ...... . . 0.4 A
Output + and - (Peak) . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . 0.5 A
Output + and - (Continuous) . . . . . . . . . . . . . . . . . . . . . . . . .... . 0.3 A
Pin (All Others) . . . . . . . . . . . . . . . . . . . . . . .... . .-0.3 V to VDD + 0.3 V
Maximum Clamp Currentb
Output A, B and C. . . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . ±1.2 A
Output + and -. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . ±0.5 A
(Pulsed 10 ms at 10% duty cycle)
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . ...... . . . . . . . . ±20 mA
VMOT to VCLAMP Diode (Peak) . . . . . . . . . . . . . . . . . . . . ...... . .100 mA
VMOT to VCLAMP Diode (Continuous) . . . . . . . . . . . . . . . ...... . . .50 mA
VMOT to CHS Diode (Peak) . . . . . . . . . . . . . . . . . . . . . . ...... . . .50 mA
VMOT to CHS Diode (Continuous) . . . . . . . . . . . . . . . . . . ...... . .25 mA
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . .. . -65 to 150°C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . .. . . 0 to 70°C
Junction Temperature (TJ) . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 150°C
Power Dissipationc - 64-Pin SQFP . . . . . . . . . . . . . . . . . . ... . . 2.0 W
Thermal Impedance (QJA)c - 64-Pin SQFP . . . . . . . . . . . ... 62.5°C/W
Notes
a. Output current rating is dependent on the system duty cycle, startup
timing and heat dissipation capability.
b. Diode currents depend on power supply start-up transient and
bypass capacitor values.
c. Device mounted with all leads soldered or welded to PC board.


Description

The Si9990ACS has a 3-phase brushless dc (spindle) motor driver and a linear transconductance amplifier suitable for driving a voice coil motor (head actuator).


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