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PDF KA3120 Data sheet ( Hoja de datos )
| Número de pieza | KA3120 | |
| Descripción | SPINDLE & VOICE COIL MOTOR ONE CHIP DRIVER | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de KA3120 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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HDD PRODUCTS
PRELIMINARY
KA3120
SPINDLE & VOICE COIL MOTOR ONE CHIP DRIVER
The KA3120 is an ASIC combination chip, which was
designed for the HDD, includes the following functions:
spindle motor drive, voice coil motor drive, retract and
power management.
To drive and control the spindle, the digital ASIC provides
the appropriate control signals (Start up, commutation,
speed control) to the KA3120. The spindle motor condition
is monitored by the FG output and the motor speed control
is accomplished via the PWMSP input. The ASIC controls
www.DataShteheet4Uvo.ciocme coil motor current via PWMH and PWML inputs
and the power management circuit always monitors the
power supply voltages.
48-QFPH-1414
FEATURES
ORDERING INFORMATION
SPINDLE MOTOR DRIVE PART
Device
Package
• Soft switching
KA3120 48-QFPH-1414
• Spindle brake after retract
• Adjustable brake delay time
• 2.0A max. current power driver
• Low output saturation voltage: 1V typical @1.6A
• PWM decoder & filter for soft switching
• The digital circuit (ASIC) based start-up, commutation and motor speed control
Operating Temperature
0 ~ 70°C
VOICE COIL MOTOR DRIVE PART
• Trimmed low offset current
• 1.2A max. current power driver
• Gain selection and adjustable gain
• Automatic power down retract function
• Class AB linear amplifier with no dead zone
• Low output saturation voltage: 0.8V typical @1.0A
• Internal full bridge with VPNP (Vertical PNP) & NPN
• VCM offset monitoring
© 1999 Fairchild Semiconductor Corporation
MIC-99D001
January 1999
Rev. B
1
1 page  
HDD PRODUCTS
PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
www.DataSheet4U.com
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Symbol
PWMSF
CFSF
ADJ
SENSE5
VDD
FG
VREF
MCLK
VCMOFF
POR
CDLY
GAINSEL
PWMH
PWML
CFVCM
CRET
VCC
FILOUT
SENSE
CRET2
PVCC
VCM(−)
SUBGND
RRET
SENSEOUT
PGND
VCM(+)
ERRIN
VDD
ERROUT
SUBGND
W
PRELIMINARY
KA3120
I/O Description
I PWM input for spindle soft switching
− Capacitor for spindle PWM soft switching filter
− Reference voltage adjustable
I Adjustable threshold voltage to 5V
− 5V power supply
O Frequency generation to spindle speed
O Voltage reference output for ASIC power
I Clock from ASIC for switching
O VCM output offset monitoring pin
O Power On Reset
− Delay capacitor for power on reset
I VCM Amplifier gain selection
I PWM signal input (MSB)
I PWM signal input (LSB)
− Filter capacitor for VCM PWM control
− Delay capacitor for retract
− 12V power line
O VCM PWM output
I VCM current sense input
− Power for VCM retract
− 12V power line for VCM output
− VCM negative output
− Ground
I Adjustable maximum retract current
O VCM current sense Amplifier output
− Ground
− VCM positive output
I VCM error Amplifier negative input
− 5V power supply
O VCM error Amplifier output
− Ground
O Spindle motor W phase output
MIC-99D001
January 1999
5
5 Page 
HDD PRODUCTS
ABSOLUTE MAXIMUM RATING (Ta=25°C)
Characteristics
Symbol
Maximum signal block supply voltage for 5V line
Maximum signal block supply voltage for 12V line
Maximum power block supply voltage for 12V line
Maximum output current
Power dissipation
Storage temperature
www.DataSheet4U.com
Maximum junction temperature
Operating ambient temperature
VDDMAX
VCCMAX
PVCCMAX
IOMAX
PD
TSTG
TJMAX
TA
NOTE:
1. When mounted on 50mm × 50mm × 1mm PCB (Phenolic resin material)
2. Power dissipation is reduced 16mV / °C for using above Ta=25°C.
3. Do not exceed Pd and SOA.
PRELIMINARY
KA3120
Value
6
15
15
2
3.0 note
−55 ~ 125
150
0 ~ 70
Unit
V
V
V
A
W
°C
°C
°C
Pd[mW]
3,000
2,000
1,000
0
0
25 50
75 100 125 150 175
Ambient temperature, Ta [°C]
RECOMMENDED OPERATING CONDITIONS
Characteristics
Supply voltage
Supply voltage in logic part
Symbol
VCC, PVCC2
VDD
Min.
10.8
4.5
Typ.
12.0
5.0
Max.
13.2
5.5
Unit
V
V
MIC-99D001
January 1999
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet KA3120.PDF ] | |
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