Product Brief November 2001
VC2010 High-Performance Spindle/VCM Control
Features
VCM Actuator Predriver
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Voltage Moni...
Product Brief November 2001
VC2010 High-Performance Spindle/VCM Control
Features
VCM Actuator Predriver
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Voltage Monitor, System Reset, and Auxiliary Supplies
5 V, 12 V, and 3.3 V undervoltage fault comparators Power-on reset signal output 3.3 V
regulator with voltage margin control and current limit Resistor adjustable negative voltage
regulator for MR preamplifiers Programmable output voltage switching and linear
regulators with undervoltage monitoring
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Transconductance amplifier with selectable class B or AB mode 14-bit DAC for actuator current control Regulated 3-stage retract on voltage fault or command Programmable on-chip transconductance compensation reduces external component count
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Spindle Control
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Other Features
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Motor inductance sense mode for determination of motor start position Microprocessor controlled ramp-to-start speed in start mode Sinusoidal current mode or 6-state commutation in run mode Programmable wave shape for optimized acoustic performance Transconductance configuration in run mode, using PWM for efficiency Peak current-limit control in start mode, using constant off-time method 10-bit DAC with 4-step gain ranging Fast restart from partial spindown, using phase frequency comparison of BEMF Automatic spindle dynamic brake at programmable RPM after retract
12-bit DAC to drive external microactuator driver 10-bit ADC to digitize selected internal and external signals Special diagnostic features for ...