L7207 Datasheet, PDF (1/3 Pages) STMicroelectronics – Dual mode disk drive spindle and VCM motor driver

L7207
Dual mode disk drive spindle and VCM motor driver
Data Brief
General features
■ Dual operative mode (Desktop and Mobile)
■ Register based architecture
■ Serial communication interface up to 40 MHz
Spindle driver
■ 3A peak current drive capability
■ Internal power devices with 0.5Ω max bridge
impedance at 125°C.
■ ST SmoothDrive architecture
■ Inductance sense start-up capability
■ Current sensing via integrated sense FET
TQFP64
VCM driver
■ 2.4A peak current drive capability
■ Internal power devices with 0.5Ω max bridge
impedance at 125°C
■ Linear and PSM VCM driving
■ Dual 14-bit linear DACs for current command
■ Power on/off ramp load and unload capability
■ Voltage retract mode
Other functions
■ 2 linear regulators.
■ Programmable switching regulator
■ Negative switching regulator
■ Internal isolation FET
■ Voltage monitoring
■ Power On Reset with integrated delay
■ Shock sensor circuitry
■ 8-bit ADC with multiplexed inputs
■ Thermal sense circuit and over temperature
shutdown
Description
L7207 is a motor controller IC designed for both
desktop and dobile hard disk drive applications.
The spindle motor driver subsystem integrates all
power FETs driven by ST's SmoothDrive
commutation technology. The voice coil driver
block includes the power FETs, as well as ramp
load and unload capability.
Linear voltage and switching regulators are
included, as well as a negative regulator and
power monitoring function.
L7207 embeds a serial interface with a maximum
speed of 40 MHz.
April 2006
Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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