L6238S datasheet(6/31 Pages) STMICROELECTRONICS

6 / 31 page

ELECTRICAL CHARACTERISTICS (Tamb =0 to 70

°C; VA =VPwr = 12V; Vlogic = 5V; unless otherwise

specified)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

GENERAL

Vanalog

Analog Supply Voltage

10.5

13.5

Ianalog

Analog Supply Current

Run Mode VA = 13.5V

1.5

2.7

4.5

Brake Mode VA = 13.5V

280

800

µA

Vlogic

Logic Supply Voltage

4.5

5.0

5.5

Ilogic

Logic Supply Current

Run Mode Vlogic = 5.5V

3.2

Brake Mode

100

500

1000

µA

THERMAL SHUTDOWN

*Tsd

Shut Down Temperature

150

180

°C

*Thys

Recovery Temperature

Hysteresis

°C

*Tew

Early Warning Temperature

Tsd-25

°C

POWER STAGE

RDS(on)

Output ON Resistance per FET

Tj =25

°C; VA = 10.5V

Tj = 125

°C; VA = 10.5V

0.20

0.26

0.40

Ω

Io(leak)

Output Leakage Current

Vpwr = 15V

Body Diode Forward Drop

Im = 2.0A

1.5

dVo/dt

Output Slew Rate (Linear)

Rslew = 100K

Ω

0.15

0.30

0.45

µs

Output Slew Rate (PWM)

150

µs

Igt

Gate Drive for Ext. Power

DMOS

Vcontrol = 1V; Vsns = 0V;

VA = 10.5V

4.5

VGate-Drive

Ext Driver Disable Voltage

0.7

VCtrl-Range

Voltage Control Input Range

5.0

Iin(VCtrl)

Voltage Control Input Current

µA

PWM OFF-TIME CONTROLLER (Rslew = 100K

Ω,Coff = 120pF)

Toff

OFF Time

µs

Vchrg

Capacitor Charge Voltage

VA = 10.5V

2.31

2.65

3.1

Vtrip

Lower Trip Threshold

1.25

PWM LIMIT TIMER

Ichrg

Capacitor Charge Current

VPWM Timer = 0V; VA = 10.5V

10.0

20.0

µA

Vchrg

Capacitor Charge Voltage

VA = 10.5V

3.0

3.5

4.0

Vtrip

Lower Trip Threshold

100

400

BEMF AMPLIFIER

ZinCT

Center Tap Imput Impedance

Ω

VBemf

Minimum Bemf (Pk-Pk)

CURRENT SENSE AMPLIFIER

Isnsin

Input Bias Current

VA = 13.5V

µA

Voltage Gain

3.8

4.0

4.2

V/V

Slew Rate

0.33

0.8

µs

L6238S

6/31

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