L7250 datasheet(6/46 Pages) STMICROELECTRONICS

6 / 46 page

L7250

6/46

NPORpull

NPOR internal pull_up resistor to

V33

6Kohm

CPORIc

CPOR charging current

Vout = 0V

CPORlow

CPOR low level output voltage

VCV > 4.5V Iol = 1mA

Vref25

2.5V reference voltage

-5%

2.5

+5%

THERMAL WARNING AND THERMAL SHUTDOWN

Twarn

Thermal warming temperature

Characterized, tested by

correlation.

130

140

150

°C

Tsoff

Thermal Shutdown temperature

Characterized, tested by

correlation

150

165

180

°C

Thys

Thermal Hysteresis

valid for both temperature

thresholds

°C

VM ISOLATION FET

IsoR

Rds ON

@ 125°C , I=2.5A

0.1

Ohm

IsoI

Continuous current

2.5

SPINDLE DRIVER SECTION

POWER STAGE

Rds(on)

Total output ON resistance

(Source + Sink)

@ 125°C, I=2.5A

0.9

Ω

Idsx

Output leakage current

-200

-500

µA

CTlkg

Centarl tap leakage

µA

DiodeFw Clamp diode forward voltage

If = 2.5A

0.6

1.2

Slew

Output slew rate

OUTx 10% to 90%

Reg04H ‘b7b6b5’ = 011

µS

BACK EMF COMPARATOR

Vie

Common mode input voltage

range.

Guaranteed by design

Input voltage range where output

shall not invert.

Guaranteed by design

-1

VM+1

BEMFoff

BEMF input offset

CT = 6V

-15

+15

BEMFhy

BEMF hysteresys

CT = 6V

SPINDLE CURRENT LIMITING

Iin

RSENSE Input bias current.

0 < Vin < 3.3V

µA

CURoff

Comparator offset

-15

+15

ELECTRICAL CHARACTERISTCS (continued)

POWER SUPPLY [VCC5 & VCV] VCC5 = 5V ±10%, VCV = 12V ±10%. Tamb = 25°C (unless otherwise specified)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

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