VC2010

Product Brief November 2001 VC2010 High-Performance Spindle/VCM Control Features VCM Actuator Predriver I 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 www.DataSheet4U.com I 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 I I I I I I I Spindle Control I Other Features I I 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 ...