Ldic LD7000
The LD7000 Servo and Spindle Predriver, a CMOS monolithic integrated circuit housed in a 64-lead TQFP package operates from +5 V and +12 V supplies. It is designed to drive a voice coil actuator and a 3-phase, Hall-sensorless motor with external power MOSFETs. The device is intended for use in 12 V disk drive applications.| Part No. | LD7000 |
|---|---|
| Datasheet | LD7000 Download |
| Manufacturer |  Ldic |
| Description | Spindle/VCM Controller and Pre-driver |
| Buy | Stock & Price |
DESCRIPTION
The actuator driver includes a saturation detector to monitor the loop compensation amplifier for saturation, an uncommitted opamp for input signal conditioning, a voltage reference to provide a precise voltage level for internal PWM buffers, and reduced power dissipation. The spindle driver includes a µP controlled startup ramp to replace the imprecise analog ramp, an external PWM input to allow PWM frequencies above the audible range, active pullup on the P driver, adjustable N-channel slew rate, and improved spindle brake performance. A precision low voltage monitor circuit is also added DataSheet4U.com to monitor +5 V and +12 V supplies and to initiate servo head retracts during voltage faults. All functions are controlled by an SSI compatible read/write serial port. Three DC-DC converter circuits for 2.5V,3.3V,&-3/5Vsupplies are also available for digital chips and MR bias negative supply.FEATURES
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● Small footprint 64 or 48 pin TQFP package Spindle dri...
