SI9993CS View Datasheet(PDF) - Vishay Semiconductors

Part Name

Description

Manufacturer

SI9993CS

12-V VCM/Spindle Motor Driver for Large Capacity HDD

Vishay Semiconductors 

Si9993CS

Vishay Siliconix

SPECIFICATIONS

Operating Conditions:

Parameter

System Manager

VDD Undervoltage Detection

Threshold (High-to-Low)

VDD Hysteresis

VCC Undervoltage Detection

Threshold (High-to-Low)

VCC Hysteresis

POR Time-out

Delay Time from PWR Failure

to POR Active

POR Charging Current

POR Comparator Hysteresis

Adjustable Internal Spindle

Brake Delay Time

Internal VCM Retract Delay

Time

VTEST Leakage

5-V Reference Initial Power-On

Tolerance

5-V Reference Drift from Initial

Power-On Tolerance

VCM Driver

Transconductance

Output Offset Current

DAC Reference Output

VCMDACIN Input Range

VCMDACIN Input Bias Current

Feedback Resistance

3-dB Bandwidth

CMRR of Current Sense

Amplifier

Head Retract Voltage Clamp

Short Circuit Head Retract

Current

Current Sense Amplifier Zero

Output Voltage

Current Sense Amplifier

Output Gain Ratio

VCC = VMOT = 12 V ±10%, VDD = 5 V ±10%, VREF(IN) = VREF(OUT), RSS = RSV = 0.2 Ω ±1%,

RSRADJ = 20 kΩ ±1%, Si9942-Si9430 LITTLE FOOT Driver, FSYSCLK = 5 MHz, TA = 0 to 70°C

Limits

Symbol

Specific Test Conditions

Mina

Typb

UVADJ Unconnected

4.500

8.5

tPOR

tPOR

IPOR

tspindly

tvcmdly

IVTEST

VREF

∆-----V----R---E----F-

VREF

GmVCM

IOS

VREF/2

Ib(L/S)

RFB

PORCAP = 0.5 µF

VCLAMP = 3.0 to 13.2 V

VDD = VCC = 0 V

D3D2(REG1) = 01

D5D4(REG1) = 01

VCLAMP = 3.0 V, VDD = VCC = 0 V

VTEST = 10 V

VREF(IN) = VREF(OUT) (Internal Reference)

IOUT = 20 mA to -2 mA

IMOTOR = 1 A, D5D4(REG0) = 11

D5D4(REG0) = 11

RLOAD = 100 kΩ

+VCMDACIN or -VCMDACIN to GND

Internal Resistor from IVCMS to COMP1

L/S, I/S and Comp Amp

Class B Power Amp

CM Input = 0 to VCC

IMOTOR = 60 mA, D7D6(REG1) = 00

V(IVCMS)

V(IVCMS)/

V(RSV)

IMOTOR = 0

D7D6(REG0) = 00, D7D6(REG5) = 11

IMOTOR = 0

D7D6(REG0) = 00, D7D6(REG5) = 11

dc Gain

350

1.0

4.75

-1.5

1.52

-25

2.09

0.1

0.32

120

2.32

4.625

0.05

9.25

0.2

500

0.8

2

192

8

5.00

1.60

0

2.2

12

1.0

0.4

70

0.4

2.5

2.67

Maxa

4.750

10.0

650

1.0

1

5.25

1.5

1.68

25

2.31

5.0

50

0.48

180

2.68

Unit

V

ms

µS

µA

V

ms

µA

V

%

A/V

mA

V

nA

kΩ

MHz

dB

V

mA

V

V/V

S-60752–Rev. A, 05-Apr-99

4

FaxBack 408-970-5600, request 70653

www.siliconix.com

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