ELECTRICAL CHARACTERISTICS

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Supply Voltage

12

40

V

Logic Supply Voltage

4.75

5.25

V

Storage Voltage

V

Max Drop Across Sense Resistor

1.25

V

Power on Reset

Off Threshold

6

7.2

V

Power on Histeresys

0.3

V

Power on Reset

Off Threshold

3.3

4.1

V

Both bridges ON, No Load

15

mA

Both bridges OFF

7

mA

DISABLE = LOW

7

mA

Shut Down Temperature

145

°C

Shut Down Hysteresis

25

°C

Thermal Shutdown

150

°C

Triangular Oscillator Frequency (*)

12.5

15

17.5

KHz

TRANSISTORS

Leakage Current

OFF State

500

µA

On Resistance

ON State

0.6

0.75

Ω

Flywheel diode Voltage

If =1.0A

1

1.4

V

CONTROL LOGIC

lnput Voltage

All Inputs

2

V

Input Voltage

All Inputs

0

0.8

V

Input Current

(Note 1)

-150

+10

µA

Disable Pin Input Current

-10

+150

µA

Reference Voltage

operating

0

2.5

V

-2

5

µA

FI =

PWM Loop Transfer Ratio

2

DAC Full Scale Precision

123

134

mV

Current Loop Offset

-30

+30

mV

DAC Factor Ratio

Normalized @ Full scale Value

-2

+2

%

SENSE AMPLIFIER

lnput Common Mode Voltage

Range

-0.7

V

Input Bias

sense1/sense2

-200

0

µA

ERROR AMPLIFIER

Open Loop Voltage Gain

70

dB

SR

Output Slew Rate

Open Loop

0.2

V/

µs

GBW

Gain Bandwidth Product

400

kHz

Note 1: This is true for all the logic inputs except the disable input.

(*) Chopping frequency is twice fosc value.

THERMAL DATA

Symbol

Parameter

Value

Unit

Thermal Resistance Junction Ambient

20

°C/W

Thermal Resistance Junction-case (*)

2.2

°C/W

(*) Depending on board and soldering.

L6258

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