TLS2205 Datasheet, PDF (1/31 Pages) Texas Instruments – VOICE - COIL MOTOR DRIVER, SPINDLE - MOTOR DRIVER, AND VOLTAGE MONITOR

SLFS040 – DECEMBER 1993
Single-Chip Voice-Coil Motor Driver and
Spindle-Motor Driver
DL PACKAGE
(TOP VIEW)
Precision Dual-Voltage Monitor
SCLK 1
56 MTRCLK
Operates From Single 5-V Supply
LinBiCMOS Technology
Low Power Dissipation
Internal Overtemperature Shutdown
Circuitry
SDATA 2
SPSZ 3
PORN 4
UV 5
CPOR 6
NC 7
55 DV_CC
54 AUXIN
53 AUXOUT
52 NC
51 HU
50 HV
Low-Profile 56-Terminal DL Package and
NC 8
49 HW
64-Terminal PM Package Available
4-V Reference Buffer
System Power-On Reset
Monotonic 8-Bit DAC
description
The TLS2205 is a combination voice-coil and
AV_CC 9
V_DD 10
VCMGND 11
VCMA 12
48 DGND
47 U
46 SPNV_CC
45 SPNSNSR2
SPNGND 13
44 SPNGND
SPNGND
14
SUBSTRATE
GROUND
43
SPNGND
SPNGND 15
AND
42 SPNGND
SPNGND 16 ^{HEAT SINK} 41 SPNGND
spindle-motor driver with voltage monitor
VCMB 17
40 SPNSNSR1
integrated circuit. This circuit is designed for
small-form-factor, high-performance hard disk
drives. The TLS2205 integrates a three-phase
brushless dc motor driver with a linear full-bridge
voice-coil driver. Additional circuitry is added for
power-up and power-down sequencing of the
driver amplifiers used for motor speed control. A
brake function can be invoked on the spindle
motor after the head is in a safe landing zone.
External sense resistors are used for precision
spindle motor and VCM current monitoring.
Automatic head retract is provided for voltage or
VCMV_CC 18
AGND 19
RETOUT 20
RETSET 21
NC 22
RSENP 23
RSENN 24
CMPI 25
CMPO 26
VIVCM 27
VCMREF 28
39 V
38 W
37 CRET
36 REFBUF
35 SPNCOMP
34 CTS
33 VPHASE
32 COMDLY2
31 COMDLY1
30 SPNSW
29 CTDRV
thermal fault conditions. The TLS2205 operates
with only 5 V of supply voltage and has a
NC – No internal connection
sleep-mode option for low-power applications. All
device functions are controlled from a three-wire serial port. Device packaging is a 56-terminal DL or 64-terminal
PM package. Center pins are tied to the die mount tab for improved heat dissipation on both packages.
Voice-Coil Motor Driver
Spindle-Motor Driver
– 0.4-A MOS H-Bridge Power Amplifier
– No Crossover Distortion
– Precision VCM Control Loop With External Sense
Resistor
– Internal 8-Bit Control DAC With Four Gain Ranges
– Controlled-Velocity Head Retract
– Compensation Adjust Terminals for Bandwidth
Control
– Capability for External Velocity Feedback
– Low r_DS(on), 2 Total
– No External Retract Power Supply Isolation
Components Required
LinBiCMOS is a trademark of Texas Instruments Incorporated.
– Hall- or Back-EMF Commutation Circuitry
– 3-Phase Driver With 1.3-A MOS Output
– Bipolar or Unipolar Drive Modes
– Programmable Frequency-Locked Speed
Control Loop
– Programmable Start-Up Current
– Linear Spindle Current Control
– Low r_DS(on), 1.3 Total
– Sector Data Tachometer Signal Input
(Optional)
– Speed Sense Tachometer Output
– Internal Schottky Diodes for Retract Power
Source
– Controlled Brake Function
Copyright 1993, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
1