EEWORLDEEWORLDEEWORLD

Part Number

Search

8980

Description
SUPERSERVO SPINDLE & VOICE-COIL ACTUATION MANAGER/DRIVER
File Size82KB,8 Pages
ManufacturerAllegro
Websitehttp://www.allegromicro.com/
Download Datasheet Compare View All

8980 Online Shopping

Suppliers Part Number Price MOQ In stock  
8980 - - View Buy Now

8980 Overview

SUPERSERVO SPINDLE & VOICE-COIL ACTUATION MANAGER/DRIVER

8980
S
UPER
S
ERVO
SPINDLE & VOICE-COIL
ACTUATION MANAGER/DRIVER
8980
TM
The A8980CJT provides complete drive, management, and control
of the voice-coil and spindle motor power actuation subsystems used
in hard disk drives. Extensive programmable control features and
system diagnostics are provided via a serial interface under the
direction of an external microcontroller. The large-scale integration
and use of advanced DABiC
(digital/analog-BiCMOS) merged
technologies results in minimum power dissipation, minimum operating
voltage requirements, and minimum external components.
The spindle drive function incorporates a three-phase MOS power
driver and a back-EMF sensing motor commutation scheme. Internal
logic and analog circuitry provide complete start-up and
µC-assisted
run modes without the need for snubbers or other external compo-
nents. Additional headroom is achieved by a proprietary circuit, which
eliminates the need for an external current-sense resistor. Intrinsic
ground clamp and flyback diodes are also provided.
Data Sheet
26310
S
UPER
S
ERVO
SPINDLE & VOICE-COIL
ACTUATION MANAGER/DRIVER
C TAP
MULTIPLEXER
BACK-EMF and
COMMUTATION LOGIC
8
SPIN-DEMAND
12
SERVO-DEMAND
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25°C
Load Supply Voltage, V
CC(PWR)
..........
7.0 V
Spindle Output Current, I
OUT(S)
.........
±
1.6 A
Voice-Coil Output Current, I
OUT(S)
....
±
0.9 A
Output Current, I
OUT(S)
......................
±
1.6 A
Logic Supply Voltage V
CC(D)
...............
6.0 V
Operating Temperature Range,
T
A
.....................................
0
°
C to +70
°
C
Output current rating may be restricted to a value
determined by system concerns and factors.
These include: system duty cycle and timing,
ambient temperature, and use of any heatsinking
and/or forced cooling.
T
C
U Y
D L
O N
R O
P E
D C
E N
U E
IN ER
T F
N E
O R
C
IS OR
D F
SER DATA IN
SERIAL INTERFACE
SERVO CONTROL
ENERGY MANAGER
ADJUST
VOLTAGE REF.
V
REF(X2)
V
REF
Dwg. PP-048
Dwg. PP-048
The voice-coil function contains a 12-bit DAC, tunable low-pass
and notch filters, and a full-bridge power driver. The MOS outputs
provide increased available voltage and lower power dissipation over
bipolar devices. Voice-coil current is sensed by internal circuitry that
eliminates the need for an external current-sense resistor. Additional
internal circuitry can be configured to provide an over-velocity fault
limit by utilizing the internally monitored current of the voice-coil motor.
The spindle and voice-coil control functions are supplemented by
an E
NERGY
M
ANAGER
™ subsystem, which efficiently channels available
power to protect the heads and the data disk during system failure or
normal system shutdown. Synchronous rectification of spindle
back-EMF voltage provides nearly lossless conversion of spindle
rotational inertia into power to operate the voice coil motor for parking
the heads. A dc-to-dc converter provides continuous operation at
minimum supply voltages. In addition, the E
NERGY
M
ANAGER
subsystem
provides several sleep modes and latched fault states for undervoltage
or thermal faults.
The A8980CJT is supplied in a 64-lead thin quad flatpack for
surface-mount applications.
FEATURES
Voice Coil Motor Driver:
s
Low r
DS(on)
MOS Outputs
s
Lossless Current Sensing
s
Zero Deadband
s
User-Adjustable Transconductance Gain
s
Retract Circuitry Functional to 0 V

8980 Related Products

8980 A8980CJT
Description SUPERSERVO SPINDLE & VOICE-COIL ACTUATION MANAGER/DRIVER SUPERSERVO SPINDLE & VOICE-COIL ACTUATION MANAGER/DRIVER
MSP430-G2 outputs ACLK through the P1.0 pin, and the duty cycle is seriously disproportionate.
[i=s] This post was last edited by helloxieyu on 2014-8-23 11:43 [/i] MSP430-G2 outputs ACLK through P1.0 pin, and the duty cycle is seriously disproportionate Problem: 1. There is a 32.768K crystal c...
helloxieyu Microcontroller MCU
USB Interface Firmware Design for CY7C68013 Chip
The USB interface (Universal Serial Bus) is a universal high-speed serial interface. Its main feature is the high-speed transmission characteristic, which can well solve the problem of mass data trans...
songbo MCU
Mitsubishi's programming software FXWINC
This software is small in size, but it is also very easy to use and suitable for low-configuration computers....
xingmiao Industrial Control Electronics
Can a hub solve the problem?
Our school uses the campus network. There is only one socket in the dormitory. Now there are five people who want to go online, and the socket is obviously not enough. Now I want to buy a hub to expan...
jxpxlee Embedded System
About 485 transmission issues
We undertook a project with 10 instruments, which were about 30m away from the host computer and used two-wire RS485 transmission. When the transmission rate was 57600 bps, the two instruments farthes...
yiwu MCU
Access to register of unclocked peripheral at 0x40010C00 cause BUS_FAULT What...
[color=#333333][font="][size=14px]For the same schematic, stm32f103test.hex and 10.hex files are loaded respectively. Loading stm32f103test.hex file can simulate normally, but loading 10.hex file give...
csz9981 stm32/stm8

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2462  1201  1499  953  1964  50  25  31  20  40 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号