KA3120 查看數據表（PDF） - Fairchild Semiconductor

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KA3120

SPINDLE & VOICE COIL MOTOR ONE CHIP DRIVER

Fairchild Semiconductor 

HDD PRODUCTS

PRELIMINARY

KA3120

ELECTRICAL CHARACTERISTICS (Continued)

(Ta=25°C, unless otherwise specified)

Characteristic

START-UP HOLD CHECK

Start-up hold check1

Start-up hold check2

START-UP MODE CHECK

Start-up mode check1

Start-up mode check2

RUNNING MODE CHECK

BEMF threshold voltage

FG output high voltage

FG output low voltage

Running mode check1

Running mode check2

SPINDLE FG GENERATION

FG frequency

FG duty

SPINDLE PWM CONTROL

PWM high level input voltage

PWM low level input voltage

High input current at PWMSP

CFSP voltage2(100% duty of PWMSP)

Low input current at PWMSP

CFSP voltage1(0% duty of PWMSP)

CFSP voltage amplitude

CFSP voltage3 (50% of PWMSP)

CFSP charging current

CFSP discharge current

Symbol

Test conditions

SHM1

−

SHM2

−

STM1

−

STM2

−

VBTH

VFGH

VFGL

RM1

RM2

−

−

−

U=V=W=5V, N=100Hz

U=V=W=5V, N=100Hz

FG

DTFG

U,V,W=120° shift pulse(1KHz)

U,V,W=120° shift pulse(1KHz)

VSPMH

VSPML

IPSP1

VSP2

IPSP2

VSP1

VSPD

VSP3

ICFSP1

ICFSP2

−

−

PWMSP=100% duty

PWMSP=100% duty

PWMSP=0% duty

PWMSP=0% duty

−

PWMSP=50% duty

PWMSP=0%, CFSP=2.5V

SPMSP=100%, CFSP=2.5V

Min. Typ. Max.

0 0.2 0.5

0 0.2 0.5

0 0.2 0.5

0 0.2 0.5

65 80 95

4.5 4.8 5.0

0 0.2 0.5

90 100 110

90 100 110

2.9

3

3.1

45 50 55

3.0

−

85

1.4

−125

3.1

1.5

2.4

−180

130

−

−

105

1.7

−105

3.3

1.6

2.5

−150

150

−

2.0

125

1.9

−85

3.5

1.8

2.6

−130

180

Unit

V

V

V

V

mV

V

V

Hz

Hz

kHz

%

V

V

µA

V

µA

V

V

V

µA

µA

MIC-99D001

13

January 1999

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