L6245 datasheet(8/15 Pages) STMICROELECTRONICS

部品番号	L6245

部品情報	5V HARD DISK DRIVE POWER COMBO

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ELECTRICAL CHARACTERISTICS (Continued)

Over velocity detector, summing amplifier

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Units

VO

Input Offset Voltage

10

mV

IBC

Input Bias Current

1

µA

G

Open Loop Gain

60

dB

PSRR

Power Supply Rejection Ratio

at DC

50

dB

GBW

Unity Gain Bandwidth

200

KHz

VR

Output Range

0.5

3.5

V

IO

Output Current

+400

µA

Over velocity detector, window comparator

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Units

tS

Switching Time

50

µs

VTL

Low Threshold

Relative to Vref

–1.32

–1.18

V

VTH

High Threshold

Relative to Vref

1.18

1.32

V

Solenoid pre-driver (Note 7)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Units

IOH

Output Current

VOH = 1.5V, VCC = 4.4V

10

mA

Three phase sensorless motor driver

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Units

IO

Max. Load Current

0.5

A

RDS(on)

Out On Resistance

Tj = 125

°C

0.75

Ω

dV/dt

Slew Rate

0.05

V/

µs

VF

Body Diode Forward Drop

I = 0.5A

1.2

V

Motor Current Sense Amplifier

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Units

IBC

Input Bias Current

1

µA

G

Closed Loop Voltage Gain

Low Gain mode

High Gain mode

19.4

4.85

20.6

5.15

V/V

PSRR

Power Supply Rejection Rate

at DC

50

dB

BW

Bandwidth

200

KHz

IO

Output Range

0

3.2

V

Spin DAC (Notes 8, 9)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Units

Res

Resolution

8

bit

NL

Differential Nonlinearity

±0.5

LSB

INL

Integral Nonlinearity

±0.5

LSB

CT

Conversion Time

From 50% point of –WR falling to

1% settling

5

µs

Zo

Output Z

14

K

Ω

FSTC

Full Scale Temp. Coeff.

200

ppm/

°C

VOH

High Output Voltage

2.85

3.15

V

VOL

Low Output Voltage

Unloaded

0

20

mV

L6245

8/15

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